Home

Three Phase Power Thyristor Units User Manual - E

1. EUROTHERM User Manual 7300A ADVANCED CONTROLLERS THREE PHASE POWER THYRISTOR UNITS 7000 series User Manual O Copyright Eurotherm Limited 2002 All rights reserved All reproduction or transmission in any form whatsoever and using any procedure electronic or mechanical including photocopying and recording without written permission from Eurotherm is strictly prohibited Ref HA 176659 ENG Issue 2 1 12 2005 i COMMISSIONING FLOWCHART Note If the code does not correspond go to the next step Check characteristics Wiring Auxiliary power supply Control and limit in I2 V2CL Calibrate minimum current ICO option Over current alarm Calibrate maximum current Power control VICL code Calibrate Imax and Pmax while not firing for given load Apply control signal Power up Check firing Alarms signalled Characteristics correspond to product code Supply protection protective earth power control If external supply electronics or fan I lim potentiometer I lim VI lim potentiometers Control signal HRC terminal ANA terminal block GRE DLE ICO LEDs Normal operation Adjust ICO calibrations and threshold while firing at full conduction Optimise firing delay for inductive load
2. To ensure that 7300A power thyristor units comply with Electromagnetic Compatibility requirements ensure that the panel or DIN rail to which they are attached is correctly grounded The ground connection designed to ensure ground continuity is not in any way a substitute for the protective earth connection 7300A user Manual Installation 2 2 MOUNTING 2 2 1 TYPES OF MOUNTING Two types of mounting are possible DINrail mounting or bulkhead mounting with screws DIN rail mounting Bulkhead mounting Attachment plate DIN rail Attachment plate Screws 16A to40A Two horizontal Two EN 50022 Two horizontal plates symmetrical rails plates gt 63A N A Two horizontal plates Table 2 1 Attachment details for both mounting types 2 2 2 ATTACHMENT PLATES Two factory fitted attachment plates on the rear of the 7300A thyristor units are used to clip the unit to a DIN rail or to screw the unit to a bulkhead Each attachment plate has attachment holes for bulkhead mounting and two fixed hooks and two mobile hooks for clipping to a DIN rail the mobile hooks are moved using a catch and spring 2 2 3 MOUNTING ON DIN RAILS Upper For DIN rail mounting pa fix two symmetric DIN rails for units plate rated 16 A to 40 A in accordance with the unit dimensions and safety JENNI recommendations TT Till mp Attachment bring the unit up against the top rail H
3. Adjust DLF alarm if conditions met 11 ON HEAT LEDs I lim potentiometer DLY potentiometer XFMR code CHK SET push button Chapter 1 Chapter 2 Page 2 11 Pages 4 3 to 4 5 5 7 Pages 4 4 Page 2 10 Chapter 2 Chapter 3 Chapter 5 Chapter 3 Chapter 4 Page 3 3 Page 5 5 to 5 7 7300A User Manual Contents CONTENTS Page Commissioning flowchart li European Directives and applicable standards IV Chapter 1 Identification of power thyristor units 1 1 Chapter 2 Installation 2 1 Chapter 3 Firing modes 3 1 Chapter 4 Control and Limits 4 1 Chapter 5 Alarms 5 1 Chapter 6 Digital Communication 6 1 Chapter 7 Maintenance 7 1 Eurotherm worldwide sales and service 8 1 PURPOSE OF MANUAL This manual Issue 2 1 describes the Basic Version and all options for 7300A series three phase power thyristor units with current ratings up to 160 A 7300A User Manual 111 European directives and applicable standards EUROPEAN DIRECTIVES AND APPLICABLE STANDARDS COMPLIANCE WITH PRODUCT STANDARD 7300A products co
4. 2 4 2 Power connection details Terminal capacity Torque Stripping length AWG Nm mm 13 13 20 16 4 or 28 8 M10 nut 10 or o 12 to attach eyelet and terminal Table 2 2 Power connection details for ratings from 16 A to 160 A Conductor cross sections should comply with IEC 60943 Use at 75 C min copper wire only 2 4 3 Three phase load wiring schemes Power connections to the thyristor unit depend on the load configuration scheme The following four configuration schemes may be used for three phase loads star without neutral 8 connection wires code 8S figure 2 7 star with neutral 4 connection wires code 4S figure 2 8 closed delta 3 connection wires code 3D figure 2 9 open delta 6 connection wires code 6D figure 2 10 7300A user Manual 2 7 Installation Protection and cutout 12 Three Phase installed by user 13 _ Protective Terminals lt supply side EUROTHERM 40 A 500V EN 60947 4 3 i 2 T1 4 12 6 T3 3 Power Terminals 7 load side Three phase load star without neutral Figure 2 7 Connecting a three phase load using star without neutral configuration 3S Protection and cut out 2 Three Phase installed by user 13 Terminals supply side E EUROTHERM 7300A C oaov EN 60947 4 3 gt L 2 TI 4 12 6 T3 3 Power Terminals 7 load side Three phase load Closed Delta Figure 2 8 Connecting
5. PLF or TLF fault channel 2 7200 and 7300 only Reserved State 1 Power unit conduction stopped due to an alarm State 1 Over temperature alarm activated fan cooled unit State 1 Link failure with the communication option for S basic versions with DLF and A versions State 1 Time out exceeded 9a15 Not used NO TR ONE eo 7300A User Manual 6 9 Digital Communication Serial Number SN Each power units has a unique serial number at the address 65520 Communication software version number V0 Board version number V1 This parameter is divided into bytes Bits 8 to 15 correspond to the board version number and Bits 0 to 7 correspond to the software version number Device Identifier DI Read Value This parameter is a unique factory configured code which identified the type of unit 7300A Modbus functions supported MF Returns the value 186 decimal which means that the product supports the functions 3 7 8 16 Communication Time Out CTO Sets the time in seconds for which the interface listens between two validated communica tion frames sent to the interface If the parameter is set to 0 monitoring is disabled The time out is disabled by default CTO 0 The authorised values are between 1 s and 65535 s and are stored in permanent memory If the time out is exceeded the interface behaves as follows The green ON Dxch front panel LED flashes at a frequenc
6. Danger High speed fuses do not provide protection for the installation Upline protection must be fitted non high speed fuses circuit breakers cut outs With the FUSE or MSFU Micro Switch FUse codes fuses and fuse holder assembly corresponding to the current rating are supplied with the product for code FUSE the fuses is not fitted with a striker bar for code MSFU the fuses has a striker bar and the fuse holder is fitted with a blown fuse microswitch If the user does not order a thyristor protection fuse or if a short wave infrared load is used no fuses is supplied code NONE A fuse part number Fuses and fuse holder assembly Part number Dimensions mm H x Wx D FU3038 16A FU3038 25A FU3451 40A FU2258 63A FU2258 80A FU2760 100A CH260024 CH260034 CH330054 CS173087U080 CS173087U100 CS173246U125 Table 7 1 Fuses without microswitch recommended for ratings 16 A to 100 A code FUSE A fuse Fuses and fuse holder assembly part number CS176513U020 CS176513U032 CS176513U050 CS176461U080 CS176461U100 Part number MFU1451 16A MFU1451 25A MFU1451 40A MFU2258 63A MFU2258 80A Dimensions mm H x Wx D CS173246U125 MFU2760 100A Table 7 2 Fuses with microswitch recommended for ratings 16 A to 100 A code MSFU Fuse part number with or without fuse holder assembly CS176762U160 CS176762U250 Important For all loads other than short wave infrared elements using
7. Figure 2 11 Control signal connection self powered unit base version a external signal e g from Eurotherm series 2000 controller b manual command from external potentiometer 2 5 3 Connecting the reference neutral voltage In 4S load configuration to enable the Diagnostic DLF and the power control VICL the neutral voltage of the three phase supply reference neutral must be applied to terminal 21 marked N EXT connector This connection of reference neutral voltag enables to measure the real load potential This connection must be protected by a 1 A fuse see figure 2 12 Loss of the reference neutral connection causes an alarm see Alarms section Coupling neutral connexion for 4 wire option DLF VICL To the network Neutal Figure 2 12 Connecting the supply neutral voltage code 4S and DLF VICL 2 10 7300A user Manual Installation 2 5 4 External power supply terminal block Power supply for electronics and fan A F The power supply for the electronics may be either internal self powered code SELF or external 115 V or 230 V depending on the product code Only one terminal 16 for 230 V or 17 for 115 V is available depending on the product code The power supply for the fan For units from 125 A and above the fan must be powered on with an external power supply115 V or 230 V depending on the product code The same code A F is used terminal 16 for 230 V or 17 for 115 V depending on
8. Diagnostic Alarm V OON VI LIM 86000 Pe Power Supply Diagnostic Diagram Firing request LED IM VICL Option Power Control Control Terminal Pinouts Control Connector Power Terminals load size Figure 1 1 General view of 7300A power thyristor unit from 16 to 40 A 1 2 7300A User Manual Identification l Protective Earth Power Terminals Terminal Supply side Te 7300A L PE Internal po aie ae power wiring diagram GRF Option PN Serious Alarm O Im ILIM ost DLY DLF Option CHK Diagnostic alarm L U O PF ser vi LIM Firing Request Control Terminal Pinouts Control Connector Power Terminals Load side Figure 1 2 General view of 7300A unit from 63 A to 100 A 7300A User Manual 1 3 Identification Power Terminals SA a ay ANN R BNN K ETUI Supply side mess f li A II i f PR DS W T N PTT 0 N n D Ur D NN E A T t I TL UU l Internal fuse i Compartment 5 Protective earth BN terminal t 2 attachement screws for internal fuse compartment P 8 7300A E EUROTHERM PR fr TI yu 3 2 4 43 E Inte
9. Nominal line to line voltage 200 volts 220 volts 230 volts 240 volts 277 volts 380 volts 400 volts 415 volts 440 volts 460 volts 480 volts 500 volts 3 Power supply for electronics Self powered External 115 V supply External 230 V supply 4 Fan power supply 100 A No fan gt 125 A 115 V fan and 115 V 230 V fan and 230 V 1 10 Basic selection 5 Load configuration Star without Neutral Star with Neutral Closed delta Open delta 6 Thyristor fuse Fuse without fuse blown microswitch Fuse with fuse blown microswitch No fuse Short wave infrared elements Burst mode or single cycle or Phase angle without limit 7 Firing mode Phase angle Burst mode base time 16 cycles base time 64 cycles Single cycle 1 base cycle Advanced single cycle 1 base cycle non firing by half cycles 4S and 6D coupling only Analogue signal current from 0 mA to 20 mA current from 4 mA to 20 mA voltage from 0 V to5 V voltage from 0 V to 10 V 9 Manual language French English German 10 Selected options Base version No options Standard V control End of code Version with options Selection of options 7300A User Manual Identification Options Communication and Certification Voltage control PA only Current control Open loop PA or C16 Voltage control and Current Limitation V2CL Power control and Current Limitation Digital Communication ModBus Pro
10. 5 7 Functions of DLF alarm push button The push button on the front panel of the unit with the DLF option is labelled CHK SET Checking Setting Pushing this push button as shown on the diagrams below sets and diagnoses the status of the PLF detection circuit 5 7 1 Setting request Push and hold until DLF LED flashes CHK Push button SET Setting LED O DIF performed LED DIF Setting not performed Figure 5 2a PLF detection setting request 5 7 2 Diagnostic y Press and hold until DLF LED is lit Push CHK lt 3 ush button SET S t 0 Monitoring LED QDbrF enabled Monitoring LED Qr disabled LED Gor PLF fault Alarm relay Alarm on amp Alarm off gt Alarm on Figure 5 2b PLF monitoring diagnosis 5 7 3 Disabling Push and hold until DLF LED stops flashing Push button S gt 86 t Monitoring LED O DLF disabled Figure 5 2c Disabling PLF monitoring 5 6 7300A User Manual Alarms 5 8 OVER LOAD ALARM ICO option The type 2 alarm Over current alarm monitors the maximum current value This alarm and option is known as ICO Intellisent Chop Off 5 8 1 Availability The ICO option is available in zero crossing firing modes Burst mode and Single cycle provided the DLF option is fitted The ICO option is not available for short wave infrared elements and transformers code SWIR or XFMR or in control with current
11. Action Thyristor unit current recalibration set threshold I max Operation of limit Current limit by threshold If the maximum of the three currents lu gt Imax firing angle variation V2 control in Burst mode 16 Thyristor unit current recalibration set threshold I max Power limitation set ratio between P and setpoint Current limit by threshold If the maximum of the three currents lu gt Imax firing angle variation P control in Burst mode 16 Power limit by control in Burst mode 16 taking P nax into account Thyristor unit current recalibration set ratio between I and setpoint Thyristor unit current recalibration set ratio between I and setpoint Power limitation set ratio between P and setpoint Current limit by transfer If the mean of the 3 currents squared I gt V 96 automatic transfer to I control by firing angle variation Current limit by transfer If the mean of the 3 currents squared I gt V2 94 automatic transfer to I control by firing angle variation Power limit by control variation of firing angle new ratio between P and setpoint Setpoint Relinearisation Thyristor unit current recalibration set ratio between I and setpoint Table 4 2 Operation of current and power limits 7300A User Manual Current limit using E Pi gt 25 L7 automatic transfer to 1 Mean value of the 3
12. Wa RE ES Pe EAE E E EUER A E War ee ed 6 2 6 1 4 Parameters Status 2 2446 oss or RE Ra a 6 2 6 1 5 Power Fdilure escorias ados tomate OE HC OP ac OR EH No 6 2 6 2 Configuring the Physical address and speed 6 3 6 2 1 Physical address 5 4066 30205 04404 be te RAUS ated ew ew da 6 3 6 2 2 Transmission speed s coins rta ew ae as 6 3 6 2 3 Addressing by message broadcasting 6 4 6 9 Diagnostic LEDS ccc van bas mor m Bane die eke R N EGRE K Ec HORROR RR 6 4 6 4 Error COJE 22 2 ee e ok A ee Ee ae E 6 4 6 5 Digital Communication Parameters 6 5 BGreg Lunes seen euer Pe PE e oe eee eae NR 6 10 7300A User Manual 6 1 Digital Communication Chapter 6 DIGITAL COMMUNICATION 6 1 GENERAL Digital communication option can control 7300A thyristo units monitor all operating parameters via the Supervisor 6 1 1 Exchange type Message are exchanged in Master Slave mode The digital communication option always operates as a slave with the supervision system or PLC as Master All exchange comprise a request from the Master and an answer from the slave except in broadcast mode 6 1 2 Communication protocol The Modbus amp RTU communication protocol is used Communication complies with the specifications given in GOULD MODICON Protocol Reference Guide PI MBUS 300 rev J 6 1 3 Transmission Transmission standard
13. a thyristor protection fuse other than the recommended fuse voids the product guarantee AN 7300A User Manual 7 3 EUROTHERM For over thirty years Eurotherm Limited have been providing an unparalleled level of service and expertise to customers in the control of Processes and Power From requirement assessment through to equipment specification and plant commissioning Eurotherm Limited is able to offer expertise and equipment in the following areas Input conditioning Process and Temperature Indicators Single Loop Process and Temperature Controllers with Programming facilities Programmable Multi loop Process Controllers Solid State Contactors Power Controllers Paper and Paperless Data Recorders e Data Acquisition and Management Instrumentation e Supervisory Systems SCADA Process Automation Systems Eurotherm Limited is part of the Production Management Division of Invensys plc one of the world s leading automation and controls companies Eurotherm manufactures at a number of locations in Europe and the USA and is a major supplier to the world s processing and manufacturing industries The company is ISO9000 approved and operates TickIT protocols for software management Please contact your local Sales Office 8 1 7300A User Manual
14. currents squared 4 5 Control Limits NOTE P current Control and Limitation operating condifiotns Standard If the gap between of the three currents squared is less than 25 of the calibrated nominal current L then the control is achived at the mean value of the three currents squared AI lt 25 I then P 11 12 18 8 1 12 3 2 Inthe case of an unbalanced load If the gap is more than 25 then the control is achieved at the squared value of the highest current value Al gt 25 I then P Imax i 1 2 3 4 6 7300A User Manual Alarms Chapter 5 ALARMS Contents Page Alarm diagnostic summary 0 2 5 1 Safety mechanisms 0 9 5 2 Alarm strategy odes REESE RR GUY bow we o oe 0 9 5 2 1 Firing EULO 2 6 52 lt 0ebd58 a4 ob EE Gao desc RE 0 9 b2 2 Alarm priority ied ERES RE IRE ERU PE 0 9 5 2 9 Memorisation Rac9 RO REC OE EE Yd 0 9 5 9 Load MONDES lt 24006542545 D ie eu ROBES ES 5 4 5 3 1 Setting the DLF alarm 0 0 5 3 2 PLF or TLF detection 229 2443 cita dr 5 5 5 3 3 PLF detection sensitivity 5 5 5 4 Signalling of channel for load fault 5 5 5 5 Load type matching 2222299 b Ru ER 0 0 5 6 Disabling alarms for load failure signalling 5 5 5 7 Functions of DLF alarm push button
15. impedance matching resistor e Two RS485 bus polarisation resistors The intertface as standard with the following internal resistors 100 kO polarisation resistors e a 100 KQ resistor betweeen the A and B terminals Important To ensure correct operation we recommend installing a matchig resistor typical value 220 Q on the last unit on the communication bus If the last unit on the bus is one of the 7000S series with digital communication this resistor must be connected between terminals A and B 2 6 4 POWER SUPPLY CONNECTION AUX2 The digital communication option auxiliary power supply is 24 Vac or 24 Vdc The typical power consumption is 1 5 VA A 2 Amps slow blow fuse is required to protect the connection leads E T 7 N N JE 24V 0VS GND 6 9 92 19 20 29 2A I Digital Supply Communication connector connector 24 Vac or 24 Vdc not polarised Figure 2 16 Power supply connection diagram 2 14 7300A user Manual Installation 2 6 5 Digital communication wiring Supervisor Master SESS pem 220 Q E pbs ine Ground U On the last unit of the bus Communication bus RS485 Shield Bus line B 220 Q i Fuse 2A EE 24 Vac or 24 Vdc Sr To the next OOO interface Auxiliary supply Y Oenr Opr SK Y OON n OHEAT EN 60947 4 3 173 74 ty 24V 0VS GND 3 19 20 29 Ll loo TE A earth D
16. selected 5 9 1 2 Alarm actions If an alarm is detected thyristor firing is cut off at the end of the half cycle for a supply fault after approx 5 s of integration for loss of reference neutral Alarms are signalled by the position of the Alarm relay contact changes the relay is only fitted if one of the alarm options is selected the green ON LED flashes Also if an alarm option is fitted loss of reference neutral is indicated by the red GRF LED lit steadily Important If the supply voltages upline from the thyristor unit are absent and the internal auxiliary supply option is used code SELF all LEDs on the unit will be unlit 5 9 1 3 Memorisation Supply Fault alarms voltage or frequency are not memorised The indicators for faults detected return to normal ON LED and relays in non alarm position after the fault condition ceases If the reference neutral voltage connection is lost the installation needs to be repaired and the unit is therefore switched off It is however possible to acknowledge this alarm using the ACK input with the ICO option 5 8 7300A User Manual Digital Communication Chapter 6 6 DIGITAL COMMUNICATION Contents Page Gl General percances Cea ee aaa eK EN NEN RI PI E LUE M 6 2 6 1 1 Exchange Type a REY NERO AC REM REC CD CC ERR 6 2 5 1 2 Communication Protocol m doe CR t a da 6 2 6 1 9 Transmissi eua sed REF
17. unit Authorised value between 0 and 255 Fast Setpoint Transfer FS Used to store prepared in advance setpoints in live memory The setpoint is transferred to the active setpoint address 01 by sending code 05 in the command word High Setpoint Limit HS Sets the maximum value of the digital setpoint Authorised value between 0 and 255 stored in permanent memory Current Limit CL Allows nominal current calibration This recalibration LS parameter is equal to the product between the digital current CL parameter and the front panel current limitation Ilim LL parameter Authorised value between 0 and 255 stored in permanent memory Only writable for units with the U I option Optional Status word OS This parameter allows the modification of some of the product configuration bit at the same time and without using the Command Word CW and its codes Parameter stored in permanent memory Note If the configuration loaded using the Optional Status Word OS is not available the only way to verify the effective result is to read the Status Word SW Bit to bit definition Bit Number Configuring status word for a basic unit Setpoint after time out exceeded 0 analogue 1 digital Working setpoint 0 analogue 1 digital Not used Firing Mode PA 001 FC1 010 FC16 011 C64 SCA 101 reserved HC16 111 reserved Control Mode U U 001 U U I I PA only FT PA only 011 res
18. 2 7300A User Manual Firing modes FIRING DELAY XFMR option In Burst mode firing with pure resistive loads the thyristors are fired at zero voltage crossing to avoid sharp current rises For an inductive load e g transformer primary switching the thyristors at zero crossing generates transient over currents see figure 3 3a This transient could cause the high speed thyristor protection fuse to blow in certain cases a Transient b Without Transient Over Current lload Vload Delay Angle 0 90 Figure 3 2 Typical switching with inductive load at zero crossing a and with delay b To avoid the over current the first thyristor Delay Angle 70 firing must be delayed relative to the Setting D LY corresponding zero for each phase E LN The delay before thyristor firing starts may be d 2 punc adjusted with the DLY potentiometer available 0 90 with the XFMR option C16 or C64 Burst mode Figure 3 3 First firing delay adjustment potentiometer XMFR option The DLY potentiometer is a 3 4 turn type and is used to set the delay angle for the first firing from 0 turned anticlockwise to end stop to 90 turned clockwise to end stop The factory setting for the first firing delay with the XMFR option is 70 typical value suitable for starting most applications The optimum firing angle can be adjusted with the DLY pote
19. 5 6 5 7 1 Setting Request 5 6 De 7 2 DIAPDOSLIC 2 544 64 xv Ib S a ee 0 6 5 7 0 DISADIIIS 24454644 642 croata r r r ii 0 6 5 8 Over Load Alarm eva dus uad A 5 7 5 0 1 NADIA Le cedo eden eed RE IE a 5 7 5 8 2 Alarm conditions sn esenee eeen 5 7 5 8 3 Alarm Actions Memorisation Acknowledgement 5 7 5 9 Standard alarms 4 4 425644444445 ORURA Ae REC 0 8 5 9 1 Faults detected 0 8 5 9 1 1 Availability ss rra uy Redes 5 8 5 9 1 2 Alarm actions 2 eos RE bes tei 5 8 5 9 1 3 Memorisation 0 8 7300A User Manual o 1 Alarms ALARM DIAGNOSTIC SUMMARY The table below summarises all status LED information needed to diagnose the fault OPTIONS gt LEDs Front panel Basic version and all options ICO ICO GRF DLF GRF DLF DIAGNOSIS MN No alarm Firing Zero crossing or Phase angle V Supply fault Firing stopped y V Y Y Y Y Over current Firing stopped zzz Neutral lost Firing stopped Over heating Firing stopped Thyristor short circuit or Total Load Failure Thyristor short circuit Table 5 1 Diagnosing operation and ala
20. 55 High Local Limit HL Value of the local setpoint limit Adjustable by VIlim potentiometer Read value between 0 and 255 Delay Triggerring DT Value of the first firing delay in degree Adjustable by DLY potentiometer Read value between 0 and 90 6 8 7300A User Manual Digital Communication Manufacturer Identifier MI This parameter returns EUROTHERM Automation as an ASCII character string 32 consecutive bytes read starting at address 65280 Command Word CW This parameter is used to modify the operation of the digital communication Codes and associated functions are given in the following table Inhibit firing Enable firing Enable supply variation compensation Disable supply variation compensation Modify reference for compensation Transfer waiting setpoint to active setpoint Alarms Acknowledgement PLF rating demand PLF monitoring disabled 0 1 2 3 4 5 6 7 8 The operations coded 2 3 4 7 and 8 are stored in permanent memory General Status Word GSW This parameter indicates the status of the main alarms from 1 to 7 and the status of moni toring during the time between communication frames The byte containing 0 to 7 may be read by Modbus function 7 Quick Read Bit definition State 1 GRF alarm TLF and THSC active State 1 PLF or TLF fault channel 1 7100 7200 and 7300 State 1 PLF or TLF fault channel 2 7200 and 7300 only State 1
21. 7 Firing Mod s 2 2 rs 55 3 ue 0 1 6 12 9 CODIEUL 572 oi ile ue 1 6 1 229 ANOS serenata e Eek RE CE eee aed ad 1 7 1 2 10 Protection ess arae id Gace qo woe Bae 1 8 I 5222922992227 52289922 9299522 5 225225999 953 1 8 1 2 12 6 x eih 1 xa acce does cr Ea ami eco ae be D ce 1 8 1 2 13 Digital Communication 1 9 LO COUTE 1oc5522 5959 0999929992 2 Sabes 1 10 7300A User Manual 1 1 Identification Chapter 1 IDENTIFICATION 1 1 GENERAL PRESENTATION 7300A series power thyristor units are used to control the electrical power of three phase industrial loads of all types The load controlled may comprise high or low temperature coefficient resistive loads short wave infrared elements or transformer primaries Current ratings vary from 16 A to 160 A per phase at line to line voltages of 200 V to 500 V A 7300A series thyristor unit comprises three channels controlled by thyristors Power Terminals Protective Earth supply side Terminal RA d al lel Tall llo l 7300A DH EN 60947 4 3 1 11 3 12 5 13 PE Current Limitation Internal AN Option io BI diagram 11 4 12 6 13 XFMR Option Current Firing Delay Limitation dus TII GRF Option i Q Im ILIM Communication Option i Transmission LEDs and Serious Alarm e e I om Der configuration microswitch CHK OOF eS DLF Option
22. Power supply fault flashing No reference Neutral flashing Thyristor firing request in Burst mode Single cycle and Advanced single cycle modes d eu Reminder Advanced single cycle is only available with 4S and 6D three phase load configuration Ny OHEAT Thyristor firing request in Phase angle mode Table 3 1 Firing modes and base LEDs on front panel During normal operation with zero crossing switching the HEAT LED flashes to match the thyristor firing periods In normal operation in Phase angle mode the HEAT LED varies in brightness depending on the firing angle with maximum brightness during full firing 3 2 BURST MODE codes C16 and C64 Burst mode firing is a proportional cycle which delivers a series of whole supply cycles to the load Thyristor firing and cut off is synchronised with the supply and occurs at zero crossing Thyristor firing in Burst mode can be A A described by the firing time Tp non firing PAL cee time Thr and modulation time T where Ty T Typ and the Base Cycle Time is equal to the number of cycles firing at 50 of the duty ratio or 50 of the power supplied to TF vt A m the load T Tr Typ Load Voltage The Base Cycle time is equal to 16 cycles for Figure 3 1 Thyristor firing for one of the code C16 and 64 cycles for code C64 phases in Burst mode 3
23. RS485 2 wires The transmission frame uses binary characters Format of each character start bit e 8 data bits stop bit Transmission is asynchronous Two transmission speeds are available 9 6 or 19 2 kbaud The speed can only be selected by the microswitch SWS on the interface 6 1 4 Parameters status The status of a parameter may be Read Read and Write or Memorised Read Write Read only parameters are labelled R e Read and Write parameters are labelled R W e Memorised Read and Write parameters are labelled R W M 6 1 5 Power failure If the power supply AUX fails the interface stops communicating and the output is set to zero When power is restored the interface enters waiting for communication state 6 2 7300A User Manual Digital Communication 6 2 CONFIGURING THE PHYSICAL ADDRESS AND SPEED In order to design the power unit and the different parameters the Modbus protocoles The 7000 series unit Physical address on the communication bus The parameter addresses which determine the parameter required Important The physical address is configured by microswitches on the front panel of the unit and cannot be chosen or changed using digital communication Configuring the digital communication involves selecting the physical Interface address communication the communication bus The transmission speed 6 2 1 PHYSICAL INTERFACE ADDRESS The interface address on the
24. V see code Use from 47 to 63 Hz automatic matching 1 3 W approx per amp and per phase ratings x 100 A Natural convection ratings gt 125 A Fan cooled Three phase Industrial Load The categories of use applicable for each unit are indicated on the identification label AC 51 Non inductive or low inductance loads furnace resistances Resistive load with low temperature coefficient AC 55b Switching of incandescent lamps for units lt 100 A Short wave infrared elements SWIR AC 56a Switching of transformers Transformer primaries and high temperature coefficient resistive loads Options must be fitted to 7300A units in order to comply with certain categories of use Independent of phase rotation order Star with or without neutral open or closed delta Configuration on order Electronics supply present green ON LED and supply fault detection CON LED flashing Thyristor firing request green HEAT LED Depth mm Base One Option Option only or Comms Comms only 16A 40A 220mm 96 mm 164 63A 100A 305 mm 144 mm 125 A 160A 498 mm 144 mm 7300A User Manual 1 5 Identification 1 2 6 Command Supply Control type 1 2 7 Firing modes Zero crossing firing Firing angle variation 1 2 8 Control Control parameter Linearity and Stability Current limit Safety ramp Calibration Transient current limit 1 6 Self powered from line or ex
25. a three phase load using closed delta configuration 3D 2 8 supply side Protection L1 and cutout i2 Three Phase installed by user N supply Thyristor Fuses WW i E 0 Protective supply side Earth EUROTHERM 7300A 40A 500V EN 60947 4 3 gt b 2 TI 4 12 6 13 Terminals 7 load side Three phase load star with neutral Figure 2 8 Connecting a three phase load using star with neutral configuration 45 Note Connection to EXT terminal only with DLF or VICL options Protection and cutout 12 Three Phase installed by user 13 Terminals Protective 40 A 500V EN 60947 4 3 gt gt gt L 2 11 4 12 6 T3 Terminals 7 load side Three phase load Open Delta Figure 2 10 Connecting a three phase load using open delta configuration 6D 7300A user Manual Installation 2 5 CONTROL CONNECTIONS Terminal blocks on the underside of the 7300A power thyristor unit are used to connect the control signals analogue and logic the auxiliary or electronics supply and the neutral alarm relay and acknowledgement contacts The wires used should be stripped for a length of 6 to 7 mm 2 5 1 Control terminal blocks The control terminal blocks are plug in screw connectors The terminal blocks available depend on the power thyristor unit version and the selected options in the product code The terminal names and num
26. al Identification 1 2 9 ALARMS Standard alarms Supply fault Operation Signalling Open circuit Neutral Operation Signalling Over temperature alarm Signalling Supply voltage absent on one or three phases Frequency outside operating frequency Cut off Without options ON LED With alarm option ON LED and alarm relay In Star with neutral coupling and for DLF option and or power control Cut off VII2 and VICL options ON and GRF LEDs DLF option ON and GRF LEDs alarm relay For all fan cooled units gt 125 A the unit cuts out if the temperature threshold is exceeded Red T LED if one of the monitoring alarms is selected Alarm relay contact with any alarm Load monitoring alarms Options Serious alarms GRF option Signalling Diagnostic alarm DLF option Signalling Settings Sensitivity Extension Over Load alarm Option Operation ICO option Signalling Alarm relay 7300A User Manual Total load failure and thyristor short circuit detection Red GRF LED and alarm relay contact Partial load failure detection Orange DLF LED and alarm relay contact Monitoring diagnosis alarm adjustment and resetting using push button on front panel Detects the failure of at least one heating element for three or four identical elements connected in parallel depending on the configuration The DLF option includes Serious alarm monitori
27. an ACK logic input terminal 62 available on the DIG IN terminal block Over load e Partial Load Failure e Total Load Failure Alarms can be acknowledged in 2 ways by connecting a contact between terminal 63 labelled 5VD 5 V user output and the ACK input see figure 2 15a by applying an external 5 V source between terminals OVD and ACK see figure 2 15b Note The DLF alarm can also be reset with the CHK SET push button a Acknoledgement by b User External Source for the contact or push button alarm acknowledgement Alarm Acknowledgement connector w e ee eH HK d 0 V 5V External source Figure 2 15 Typical external alarm acknowledgement contact connections 7300A user Manual 2 13 Installation 2 6 COMMUNICATION BUS CONNECTION 2 6 1 Polarity By convention the voltage on line A of the bus is higher than the voltage on line B of the bus when the RS485 line is active 2 6 2 Wires screening To guarantee reliable operation of the digital communication link the bus must be connected using shielded twisted pairs Important e The shield of the communication cable must be connected to ground using the shortest possible connection at both ends We recommend connecting the shieleding to the DIN mounting rails as near as possible to the interface 2 6 3 Termination resistors The communication bus must have termination resistors fitted at each end One line
28. at fixed addresses allowing the Master Modbus in order to obtain data from the slave whatever power units from the 7000 range is used with the digital communication option Decimal Address Abbreviation Parameters name Format Measure 7300A User Manual Setpoint Local Fast Setpoint transfer High Setpoint Limit Current Limit Optional Status Word Status Word eXtended Status Word Output Power Process Value Working Setpoint Power Voltage Value Current value channel 1 Current value channel 2 Current value channel 3 Current Value Remote Input Local Limit Limit Setpoint High Local limit Delay Triggerring Manufacturer Identifier Command Word General Status Word Serial Number Version 0 Version 1 Device Identifier Modbus Function Comm Time Out Setpoint Time Out aa 22 0 255 0 100 0 255 0 100 0 255 0 100 0 255 0 100 HEX HEX HEX 0 255 0 100 0 255 0 125 0 255 0 100 0 255 0 125 0 255 0 125 0 255 0 125 0 255 0 125 0 255 0 125 0 255 0 100 0 255 0 100 01 255 0 100 0 255 0 100 0 255 0 100 0 90 0 100 ASCII 0 7 HEX HEX HEX HEX 0 65535 HEX 0 65535 0 255 6 5 Digital Communication PARAMETERS DESCRIPTION Setpoint Local SL Corresponds to the value required for the internal regulation loop of the
29. be included 6 3 DIAGNOSTIC LEDs Three LEDs on the front panel show the interface status Green LED Green ON Dxch diagnostic LED supply and date exchange Initialisation phase Waiting for Orange LED on power up frame Master established Communication bus reception SA Orange LED P Communication bus transmission Flashes 5 times Flashes at Lit standily 400 ms on 0 5 Hz 400 ms off 1son 1sSs off Figure 6 2 Interface status diagnostic LEDs Table 6 1 operation of green ON Dxch LED Important If 00 address reserved for broadcast is selected by mistake the interface remains in the initialisation phase Orange Rx LED Linked to data received and flashes as requests are sent by the master Important If the Rx LED is lit steadily the polarity of the communication signals may be inverted Orange Tx LED linked to data sent and flashes as responses are sent by the Slave 6 4 ERROR CODES If the interface detects an error in the frame received it returns an error code Error Code Error type decimal Prohibited function Prohibited parameter address unauthorised code sent Internal link failure if present Prohibited data value No data in request Too much data in request Table 6 2 Meaning of communication error codes 6 4 7300A User Manual Digital Communication 6 5 DIGITAL COMMUNICATION PARAMETERS PARAMETERS The following parameters are
30. bers are marked on the front panel for available terminal blocks The table below gives details of all terminals and terminal blocks Version Terminal Terminal description Terminal Torque block name No Purpose capacit Nm 0 V for analogue signals for analogue signals o V user output A F 230 V aux supply except 115 V aux supply SELF Neutral or second phase DIG 0 V logic signal Alarm acknowledgement o V user output Alarm relay contact code NC Alarm relay contact code NO Supply Neutral for 4S Not connected ADJ CAL 0 V calibration Calibration control Auxiliary power supply Comme connector Table 2 3 Description of control terminal blocks 7300A user Manual 2 9 Installation 2 5 2 Control signal The analogue control signal terminal block is labelled ANA Input Signal The input available corresponds to the input type selected in the product code specified range of voltage or current The signal must be connected between terminals 32 and 31 The of the control signal must be connected to terminal 32 labelled RI A typical external signal connection is shown on figure 2 11a Manual Control Figure 2 11b shows how to use the internal 5 V voltage terminal 33 labelled 5VA for manual control with an external 10 kQ potentiometer input code 0V5 only Analogue conector signal connector 10 kQ Control Potentiometer Signal 5 V internal LJ
31. communication bus is set by switches SW1 LSB bit 0 to SW MSB bit 6 The address may be set between 1 to 127 Example Switch positions to set the unit s address to 74 1001010 binary in 7 bits Address 74 in binary 7 bits Switch position Switch number SW 6 2 2 TRANSMISSION SPEED The transmission speed is determined by switch SWS ON position bit 1 the OFF position corresponds to a speed of 9 6 kbaud C NUT e the ON position corresponds to a speed of 19 2 kbaud R Important The factory default settings are for an address of 32 and the transmission SW1 to SW7 position speed corresponding to the product code correspond to the address 74 SW8 position corresponds to the transmission speed 9 6 kbauds Coinfigurration switches SW1 SW8 Figure 6 1 Example Switch positions 7300A User Manual 6 3 Digital Communication 6 2 3 ADDRESSING BY MESSAGE BROADCASTING 00 address is reserved for the message diffusion to all the units connected to the bus In this case all the Slaves carry out the order but none will answer Writing diffusion is available on every parameters with the Read and Write status Important User is responsible for ensuring that a write command broadcast does not A affect the operation of other units on the same communication bus In a program loop the Writing of a parameter which is saved in permanent memory must not
32. d mounting 2 9 NN L RS EE dr eee ie 2 4 Power connections 2 4 1 General 1143 b044e tartas obs 2 4 2 Power connection details 2 4 3 Three phase load configuration diagram 2 5 Control connections 2 5 1 Control terminal blocks 2 5 2 Control signal aar ret on R N AR 2 5 3 Connecting the reference neutral voltage 2 5 4 External power supply terminal block 2 5 5 Alarm relay contact 2 2 2 2 5 6 Acknowledgement signal 2 6 Communication bus connection 2 6 1 POIArIty A 2 6 2 Wires screening 2 6 3 Termination resistors 2 6 4 Power supply connection AUX 2 6 5 Digital communication wiring 7300A user Manual 2 1 Installation Chapter 2 INSTALLATION 2 1 SAFETY DURING INSTALLATION MOUNTING AND WIRING 2 2 Danger e 7300A power thyristor units must be installed and wired by qualified staff authorised to work on low voltage industrial electrical facilities Units must be installed in a fan cooled cabinet to ensure that condensation and pollution are excluded with a class of at least 2 according to IEC 60664 We recommend fitting fan cooled cabinets with a fan failure detection device or a thermal sa
33. ducted disturbances induced by radio frequency fields EN 61000 4 6 Voltage dips short interruptions and voltage variation EN 61000 4 11 EMISSIONS The EMC emissions test standards required by the standard EN 60947 4 3 Contactors and motor starters AC semiconductor motor controllers and contactors for non motor loads are presented below Emission type Firing mode Test standard Radiated at radio frequencies All firing CISPR 11 Class A modes Conducted at radio frequencies Burst mode and CISPR 11 Class A Group 2 Class A 2 S ingle cycle Phase angle CISPR 11Product compliant if external filter fitted EMC GUIDE To help you deal with installation dependent electromagnetic interference effects Eurotherm provides an Electromagnetic compatibility installation guide ref HA 025464 ENG which sets out best current practice regarding EMC DECLARATION OF CONFORMITY CE is available on request iv 7300A User Manual Identification Chapter 1 IDENTIFICATION OF POWER THYRISTOR UNITS Contents Page 1 1 General presentation 1 2 1 2 Technical specifications 1 5 m A 1 5 LA OWED es Saree he antes ra cs red 1 5 1 DOO ore he roto ra ca 1 5 L2 4 a IHE Sus osea a eee EIE EE SERES 1 5 1 2 5 Dimensions suertes mue IARE ed ated oe cee MO OM S 1 5 1 2 6 COMIMNANG 40546445444 ERROR XE Peter e dob dob du EXER E 1 6 1 2
34. e allowed From UT to P and reciprocally From U P to UxIF and reciprocally see note 4 From P to UxIP and reciprocally see note 4 From Open Loop OL or U to I2 but not the other way round see note 5 From OL or U to UT but not the other way round see note 5 From OL or U to UXIF but not the other way round see notes 4 and 5 If the unit is configured in burst firing mode the following changes are allowed From V2CL to VICL and reciprocally this corresponds to a change between the control modes U and UxI with HC16 firing mode active see note 2 From U2 to V2CL but not the other way round a current limitation is applied with U2 control threshold see note 5 NOTES 1 On inductive loads FC1 or SCA is automatically switched to in C16 in order to avoid the 2 HC16 V2CL C16 or VICL C16 which is a C16 firng mode with current limitation by threshold thyristor conduction angle limitation 3 UTD automatic transfer from a U control to a P control and reciprocally UxID automatic transfer from a UxI control to a P control and reciprocally 4 In order to be allowed the out of factory configuration must be UxIP 5 When in P or V2CL control mode it is possible to get back to U2 or OL control mode depend ing on the case after having switched off the unit 6 When swithching from burst firing mode to phase angle the control loop is restre to zero in order toi achieve a ramp start When swithching from phase angle t
35. e following conditions no over temperature or thyristor short circuit faults the rms voltage across load is greater than 40 of the nominal voltage 5 3 3 Partial Load Failure Detection Sensitivity Partial Load Failure Detection Sensitivity can be expressed in terms of a maximum number of load elements connected in parallel for which the unit can detect the failure of one element The DLF sensitivity guaranted for identical three phase loads connected in parallel is 3D coupling 1 element out of 3 3S 4S and 6D coupling 1 element out of 4 5 4 Signalling of channel for load fault With the DLF option the DLF LED flashes in particular ways to indicate the number of the controlled channel of the three thyristor channels on which load failure TLF or PLF has occurred 5 5 Load type matching PLF detection is adapted to the load type The type of load controlled is selected when ordering with the product code LTCL Low Temperature Coefficient Load or SWIR Short Wave InfraRed elements 5 6 Disabling alarms for load failure signalling PLF fault signalling DLF indicator and relay can be temporarily excluded from alarms by pressing the CHK SET Check Setting push button If the fault persists DLF signalling returns to the alarm position If the ICO option is used PLF and TLF faults can be excluded from alarms using the external acknowledgement logic input 7300A User Manual 5 5 Alarms
36. emorisation Load monitoring and standard alarms are not memorised After an alarm has been detected and once the fault conditions have cleared signalling for these alarms LED and relay returns to the non alarm position Over current alarms and Neutral cut off are memorised and must be acknowledged Thyristor short circuit and neutral cut off require repairs 7300A User Manual 5 3 Alarms 5 3 LOAD MONITORING Two diagnostic options are available GRF option Gross Fault which permits to detect the following serious faults Total Load Failure TLF Thyristor Short Circuit THSC Over Heating T for units 125 A only DLF option Diagnostic Load Failure presents the same fault detection as GRF option with in addition the Partial Load Failure detection PLF Red LED Overheating 2 80 A Red LED Serious faults Orange LED Partial Load Failure DLF alarm adjustment and diagnostic push button Figure 5 1 Layout of front panel LEDs with GRF and or DLE option LED State Firing Temps de T DLP HEAT stopped r action red orange green typique Partial Load Failure OFF Flashing PLF ON 5 810 138 Total Load Failure OFF Flashing Or TLF Flashing Thyristor Short Circuit OFF THSC Over temperature T ON Table 5 1 LEDs for serious alarms or faults with GRF and or DLF options Note Thermal faults are signalled by the T LED
37. ent I from 20 to 100 of I max power P nax from 50 to 100 of Vy Lx The HRC setting control signal ADJ CAL terminal block can be used to aid setting with the I lim and VI lim potentiometers whether or not the thyristor unit is firing Setting current and power limitation The value of the DC voltage between terminals HRC 67 and OVC 66 represents The image of the maximum current VI lim potentiometer fully turned in the direction of the arrow The image of the maximum recalibrated power 1 V corresponds to 100 P The control signal is equal to 1 V if calibrations are nominal 1 In and P Py The minimum value of the signal is 0 1 V L 20 and VI lim set to 50 of Vx Lmax max max Setting 1 Turn the VI lim potentiometer fully round in the direction of the arrow nominal power 2 Use the I lim potentiometer to set the L value 3 Use the VI lim potentiometer to set the P nax value Check the resulting power setting on the HRC signal accounting for I max Important The current limitation must be done before adjusting the power limitation 4 4 7300A User Manual Control Limits 4 3 CURRENT AND POWER LIMIT SPECIFICATIONS The table below summarises the operation of the limits used in the 7300A series power thyristor units Firing mode C16 Control type Potentiometer Name Ilim
38. erved U I lt gt I 101 reserved Open Loop 111 reserved Not used 6 6 7300A User Manual Digital Communication Status Word SW Bit to bit status definition of the unit Reserved Product configuration Limitation mode 0 in Phase Angle T by conduction inhibition PA 001 FC1 010 FC16 011 C64 SCA 101 reserved HC16 111 reserved UU 001 U U 1 I PA only 010 I I PA only 011 U I 100 U T I T 101 reserved 110 Open Loop 111 reserved Load type Resistive or inductive Load type for DLF detection 0 LCTL 1 SWIR reserved 00 star configuration 8S 01 Star with neutral 4S 10 Delta configuration 3D 11 Open Delta 6D eXtended Status Word XS Bit to bit alarm status Bit Number Configuration Status word for the XS parameter GRF fault TLF and THSC PLF and TLF fault channel 1 PLF and TLF fault channel 2 PLF and TLF fault channel 3 PLF setting state T set Current limitation using PA Active Reserved Reserved Supply fault Phase missing or frequency fault Unit disabled Allowed by digital communication Thermic fault Short circuit thyristor fault Over Load fault Reserved Neutral failure in 4S configuration Reserved Reserved 1 O O1 Qa ND 7300A User Manual 6 7 Digital Communication Output Power Request OP Corresponds to the duty ratio value in bust
39. etwork Protection and cut out installed by user Thyristor Fuses external lt 100 A Protective Earth E EUROTHERM 7300A 0 44501 EN 60947 4 3 1 L1 3 12 5 L3 n 271 4 T2 6 T3 Y Q cnr j ow eg Y Oon To three phrase Load Auxiliary Power Supply Figure 2 5 General connection diagram units x 100 A 7300A user Manual 2 5 Installation Protection and cut out installed by user Controlles Channel Terminal supply side Protective Earth terminal Internal fuse compartment Thyristor protection Internal power wiring diagram 160 A 500 V 1 L1 3 L2 5 L3 2 T1 A T2 6 T4 Y OON n OHEAT EN 60947 4 3 3 0va RI 5VA gt 230 N amp l2 S x N 31 32 33 u 16 17 18 14 21 22 E Bornes des voies contr l es c t charge e 3a 3b 375 76 Internal fuse blown contact If selected Figure 2 6 General Diagram for units gt 125 A 2 6 7300A user Manual Installation 2 4 POWER CONNECTIONS 2 4 1 General Ratings from 16 A to 160 A 7300A power thyristor units comprise three channels controlled by thyristors Terminals 1 L1 3 L2 and 5 L3 must be wired to the three phase supply network Terminals 2 T1 4 T2 and 6 T3 must be wired to the three phase load The protective earth terminal PE marked with the earth symbol must be wired to the protective earth see section Safety during installation
40. fety cut out The cabinet must be closed and connected to the protective earth according to IEC 60364 or applicable national standards Important Units must be mounted with the heatsink positioned vertically and with no obstructions above or below the unit which could reduce or hamper air flow If several units are fitted in the same cabinet arrange them such that air from one unit is not drawn in by the unit above The ambient temperature beneath the unit must not exceed 45 C Leave a gap of at least 10 mm between adjacent units Important Nominal currents correspond to use at ambient temperatures of no more than 45 C Overheating may cause incorrect operation and may even lead to components being damaged Danger It is the user s responsibility to wire and protect the facility according to best practice and applicable standards A suitable device ensuring that the unit can be electrically isolated from the supply must be installed upline to enable work to be performed safely Conductor cross sections should comply with IEC 60943 Only use copper cables and wires rated for use at 75 C Before connecting or disconnecting the unit check that power and control cables and leads are isolated from voltage sources The protective earth must be connected before any other connections are made and should be the last cable to be disconnected The protective earth connection terminal is marked with the symbol e Important
41. firing mode or to the conduction angle in phase angle firing mode Read value between 0 and 255 Process Value PV Represents the selected parameter value for the regulation system Read value between 0 and 255 Working Setpoint SP Corresponds to result of the product between the setpoint local and the setpoint limit with Bit1 09 1 SP SL HS 255 Read value between 0 and 255 Or is the result of the product between the remote input and the high local limit with Bit 1 09 0 SP RI HL 255 Read value between 0 and 255 Power PW Corresponds to the output power of the power thyristor unit after possible recalibration Only present if U I option chosen Read value between 0 and 255 Voltage value VV Read value between 0 and 255 Current Value Channel 1 C1 Read value between 0 and 255 Current Value Channel 2 C2 Read value between 0 and 255 Current Value Channel 3 C3 Read value between 0 and 255 Current Value CV Mean value of the three currents CV C1 C2 C3 3 Read value between 0 and 255 Remote Input RI Read value between 0 and 255 Local Limit LL Value of the potentiometer Ilim on front panel Limit Setpoint LS Represents the current recalibration Corresponds to the result of the product between the digital current limit CL and the local Limit LL LS CLXLL 255 Recalibration cannot be less than 20 of the nominal current of the power unit Read value between 51 and 2
42. gned isolation voltage Vi 500 V Degree 2 acceptable defined by IEC 60664 RH 5 to 95 non condensing non streaming Over voltage category II as defined by IEC 60664 7300A User Manual Identification 1 2 13 DIGITAL COMMUNICATION Protocol Compliance Power supply Transmission Terminaison Address Diagnostics Other parameters 7300A User Manual Modbus RTU Communication complies with the specifications given in GOULD MODICON Protocol Reference Guide PI MBUS 300 rev J 24 Vac 20 47 to 63 Hz to 24 Vdc 20 non polarised filtered Typical consumption 1 5 VA Protection External fuse 1 A External wiring must comply with the IEC 60364 standard Standard RS485 2 wires Speed 9600 to 19200 bauds Selection by the front panel microswitch SW8 The communication bus must have termination resistors fitted at each end One line impedance matching resistor two RS485 bus polarisation resistors Selection by switches on front panel only between 1 to 127 Physical address 32 is configured by default Green LED an front panel indicates that power is applied and the unit is awaiting communications e Two orange LEDs Rx and Tx indicate the communication satus sending and receiving Read and Write by digital communication 1 9 Identification 1 3 CODING Ratings 1 Nominal current per phase 16 amps 20 amps 40 amps 63 amps 80 amps 100 amps 125 amps 160 amps 2
43. he product code 4 1 2 INPUT OUTPUT RATIO The value of the control parameter is proportional to the analogue setpoint signal between 4 and 96 of the scale see figure 4 1 Control parameter 100 100 75 50 0 20 40 60 80 100 Setpoint Figure 4 1 Ratio between control system input and output The ratio between the setpoint and the control parameter V I or P is linear Four types of input signal are available in the thyristor unit product codes 0 20mA or 4 20mA 0 5V or 0 10 V 4 2 7300A User Manual Control Limits 4 2 LIMITATIONS ADJUSTEMENT options The thyristor units are factory calibrated to their nominal value I and Py Vy ly The limits can be adjusted by adjusting the values with the I lim multi turn and VI lim 3 4 turn potentiometers on the front panel 4 2 1 CURRENT LIMITATION options without V I control The I lim potentiometer enables to limit the load current to a chosen value The active state of the current limitation is indicated by a green flashing LED Tlim The new current value I can be recalibrated between 20 and 100 of Iy Green LED x rcr IMMINET qa E EE Flashing T tum TO calibration Current current limit active potentiometer Im o Current setting 1 Turn the T lim potentiometer full
44. ie dis engaging the two fixed hooks on the top Re attachment plate NS0022 DIN Rails 220 125 push the unit against the rail e clip the unit onto the bottom rail using Mobile attachment hook the mobile hooks on the bottom Catch to move attachment plate ensuring that they EA Mocks downwards are properly engaged q X Lower attachment BL N plate T N i IR i NT E To remove the unit e move the mobile hooks downward by Lo pulling the catch on the bottom attachment plate unclip the unit from the rail 9 iv Figure 2 1 Attaching the 7300A lt 40 A units to DIN rails 7300A user Manual 2 3 Installation 2 2 4 BULKHEAD MOUNTING For 2 2 Mp Screws N eo m 144 For 2 M6 screws X Ho Y K JE N For 2 M6 screws S x Figure 2 4 Bulkhead mounting gt 125 A units t A q AMM 124 For 2 M6 screws Figure 2 3 Bulkhead mounting 63 A to 100 A units 2 4 7300A user Manual Installation 2 3 WIRING GENERAL CONNECTION DIAGRAM The general connection diagram shows the power terminals independently of the three phase load configuration and control connectors To supply n
45. if one of the alarm options or one of the control options except V2 and OL is fitted The unit is protected against thermal faults whether or not they are signalled Thermal faults are signalled by the alarm relay if one of the alarm options is fitted The DLF LED flashes in particular ways to indicate the number of the controlled channel of the three thyristor channels on which load failure TLF or PLF has occurred 5 4 7300A User Manual Alarms 5 3 1 Setting the DLF alarm This can be set using the push button on the front panel The PLF detection setting can only be adjusted reference impedance recalculated in the following conditions rms voltage across load is greater than 40 of the nominal voltage rms current is greater than 30 of the rated current no over temperature or thyristor short circuit faults each time PLF setting is required the three phase load must be balanced in order to guarantee the full scale sensitivity settings must be done at the load s nominal temperature Note PLF settings stay memorised even if a supply cut out occured 5 3 2 Partial or Total Load Failure Detection PLF detection is only possible under the following conditions no over temperature or thyristor short circuit faults rms voltage across the load greater than 40 of the nominal voltage and rms load current greater than 596 of the rated current Total Load Failure TLF monitoring is only possible under th
46. igital communication Auxiliary block terminal supply Figure 2 17 Digital communication wiring example 7300A user Manual 2 15 Installation 0346 98004 user Manual Firing modes Chapter 3 FIRING MODES Contents Page 3 1 General and firing mode signalling 3 2 3 2 Burst mode codes C16 and C64 3 2 Firing delay XFMR option 3 3 3 3 Single cycle code FC1 3 4 3 4 Advanced single cycle code ASC 3 4 3 0 Phase 34816 code PA ait Sted Bay Menu be wee eo ks 3 5 2 0 dlety ramp 21 1 2 ER as He ee PhS at SR es 3 6 3 6 1 Ramp on Start Up 3 6 3 6 2 Magnetisation ramp XFMR option 3 6 7300A User Manual 3 1 Firing modes 3 Chapter 3 FIRING MODES 3 1 GENERAL AND FIRING MODE SIGNALLING 7300A power thyristor units can be controlled with one of the following thyristor firing types thyristor firing angle variation Phase angle code PA aseries of supply voltage cycles with zero crossing firing Burst mode codes C16 C64 FC1 ASC Two indicators green ON and HEAT LEDs are included on the front panel in all versions either basic or with options The indicators correspond to the thyristor firing mode as shown in the table below LED labelling Signalling Power supply for electronics V OON
47. limit code VICL or V2CL 5 8 2 Alarm conditions With the ICO option an Over load fault is detected if one of the following two conditions occurs the instantaneous current on one of the three phases exceeds a threshold of 150 of the instantaneous rated current the rms load current over 5 consecutive seconds on one of the three phases exceeds a threshold of 110 of the recalibrated rms current The instantaneous or rms current threshold can be adjusted with the I lim potentiometer during the current calibration phase from 20 to 100 of the nominal current for the thyristor unit 5 8 3 Alarm Actions Memorisation Acknowledgement If an over current alarm is triggered thyristor firing stops at the end of the half cycle when the instantaneous current threshold is exceeded after approx 5 s of continuously exceeding the rms current threshold Over current alarm cut off is signalled as follows the position of the Alarm relay contact changes e the ICO LED flashes and turns red Important The ICO LED starts flashing as soon as the rms current exceeds the threshold i e 5 s before firing may be cut off Setting the Over current alarm threshold in operating conditions is described on page 4 4 Alarm threshold adjustment potentiometer Red LED Over Load alarm 1co LM A ME Y Q cnr CHK U DLF EE Figure 5 3 Layout of the ICO LED and I lim potentiometer wi
48. mply with the terms of product standard EN 60947 4 3 Contactors and motor starters AC semiconductor motor controllers and contactors for non motor loads CE LABELLING 7300A products installed and used in accordance with the user manual bear CE labelling on the basis of compliance with the essential requirements of the European Low Voltage Directive 73 23 EEC dated 19 February 1973 modified by 93 68 EEC dated 22 July 1993 and the Electromagnetic Compatibility Directive 89 336 EEC dated 3 May 1989 modified by 92 31 EEC dated 28 April 1992 and 93 68 EEC dated 22 July 1993 SAFETY The units have IP20 protection rating as defined by standard IEC 60529 External wiring must comply with standards IEC 60364 4 43 and IEC 60943 Copper cables and conductors must be used rated to a temperature of 75 C 167 F ELECTROMAGNETIC COMPATIBILITY EMC 7300A products installed and used in accordance with the user manual are designed for an industrial environment and must not be used in the home EMC TEST STANDARDS IMMUNITY The EMC immunity test standards required by the standard EN 60947 4 3 Contactors and motor starters AC semiconductor motor controllers and contactors for non motor loads are presented below Test type Standard Behaviour criterion Electrostatic discharge EN 61000 4 2 2 Radiated radio frequency electromagnetic field EN 61000 4 3 Electrical fast transient burst EN 61000 4 4 Surge EN 61000 4 5 Con
49. ng GRF Cut out if current threshold exceeded Only available for Zero crossing firing with DLF option not compatible with Short wave infrared elements Transformers and VICL and V2CL options Two alarm thresholds instantaneous current and rms current Simultaneous current threshold adjustment recalibration of thyristor unit from 20 to 100 using potentiometer on front panel Red ICO LED and alarm relay contact Acknowledged by logic input Available with load monitoring and over load alarm The relay contact 0 25 A 230 Vac 32 Vdc is either open on alarm or closed on alarm depending on the product code 1 7 Identification 1 2 10 Protection Co ordination type Electrical protection Thyristors Fuse characteristics 1 2 11 Mounting Mounting 1 2 12 Environment Use Storage Isolation voltage Pollution Humidity Over voltage 1 8 For short circuits Load monitoring IP20 without adding additional protection Varistor and RC snubber High speed fuses rating lt 100 A external see code section 6 rating 2 125 A internal under development No fuses for Short wave infrared elements in Burst mode and Single cycle firing or Phase angle without Current limit See section 7 Attachment plate fixed to unit on symmetrical EN50022 DIN rail or bulkhead mounting for ratings gt 63 A bulkhead mounting only 0 to 45 C at nominal current max altitude 1000 m 10 C to 70 C Assi
50. ntiometer to match the cos of the load to obtain a minimal transient over current using an oscilloscope 7300A User Manual 3 3 Firing modes 3 3 SINGLE CYCLE code FC1 Burst mode firing with a single firing or non firing cycle is known as Single cycle For example with a setpoint of 50 corresponding to a duty ratio n 50 the modulation comprises 1 firing cycle and 1 non firing cycle For duty ratios n 50 the firing time remains unchanged 1 cycle and the non firing time increases For duty ratios n gt 50 the non firing time remains unchanged 1 cycle and the firing time increases 3 4 ADVANCED SINGLE CYCLE code ASC In order to reduce power fluctuations during firing time Advanced single cycle thyristor firing mode uses a whole number of cycles for firing and a whole number of half cycles for non firing and Important Advanced single cycle firing mode is only available for 4S or 6D three phase load configuration For duty ratios n lt 50 the thyristor firing time is set to one cycle non firing occurs for half cycles For duty ratios n gt 50 the non firing time is set to half a cycle firing occurs for whole cycles By using half cycles for non firing time the modulation time is reduced compared with standard Single cycle mode which is equivalent to burst mode with one cycle Advanced Single Cycle mode Code ASC reduces flicker on short wave infrared elemen
51. o burst of phase angle HC16 a ramp of angle is applied on the next conduction 7 On a factory configured unit with burst firing mode and after a change to work in phase angle getting back into burst firin mode is only possible after having switched off the unit With identical functions digital communication settings are has priority on factory settings Important On 7300A products there is no scale control or value validity sent via the digital communi cation option In case of over flow the value will not be saved 7300A User Manual 6 11 Digital Communication 6 12 7300A User Manual Maintenance Chapter 7 7 MAINTENANCE Contents Page 7 3 Safety during maintenance ccc cee ec nnn 7 2 To WVIAC Ce 27 ursi web a 0 ca fab Gee be abdo d deii fac caw ER d 7 2 7 3 Thyristor protection fuses 4 scu es 6 ones A POR OW SES CSO dures ni 7 3 7300A User Manual 7 1 Maintenance 7 Chapter 7 MAINTENANCE 7 1 SAFETY DURING MAINTENANCE Please read carefully before commissioning the thyristor unit Important Eurotherm shall not be held responsible for any damage injury losses or expenses caused by inappropriate use of the product or failure to comply with this manual Accordingly the user is responsible for checking before commissioning the unit that all the nominal characteristics correspond to the conditions under which it is to be installed and used Danger The product must be commi
52. rms according to front panel LED status 9 2 Total Load Failure Partial Load Failure 7300A User Manual Alarms Chapter 5 ALARMS Options 5 1 SAFETY MECHANISMS The alarms on the 7300A protect the thyristors and the load against certain types of abnormal operation and provide the user with information about the type of fault e The user is responsible for installing independent safety mechanisms which must be inspected regularly Given the value of the equipment controlled by the 7300A this is strongly recommended Eurotherm can supply various types of suitable alarm detector 5 2 ALARM STRATEGY Load monitoring option monitoring of load and thyristors Over Load Alarm option protection against exceeding a current threshold e Standard Alarm supply fault neutral cut off and over heating for units gt 125 A Alarms are not under any circumstances a replacement for personnel protection Danger 5 2 1 Conduction inhibited Th detection of the following default e Over Load Overheating for current ratings gt 125 A only Supply voltage or Loss of neutral Frequency out of range Stops the thyristor conduction even if the control signal is present 5 2 2 Alarm priority Only one alarm is signalled if several faults occur simultaneously Over load and standard alarms thermal faults and thyristor short circuits take priority over load fault 5 2 3 M
53. rnal wiring diagram DLF Option internal fuse for y Tam Tan CHK SET 125 to 200 A ratings 2 1 E Push Button FT DLF alarm Over temperature eee i er p Alarm gt 125 A only ll setting diagnosis Or ST Y OON EN 60947 4 3 Fuse blown contact unen ea MSFU code BREST SS Control terminals Power terminals il NI load side am g 6 13 ZA fq 3 ML expres 4 N mi IN IS An le U 53 gt AAN INI M E EM MA ps 1 Fixing plate I II MI li ARA lu UUN IL IU L L 1 Tu U Y bern N J N y U U Y Figure 1 3 General view of 7300A units gt 125 A 1 4 7300A User Manual Identification 1 2 TECHNICAL SPECIFICATIONS 1 2 1 Use 1 2 2 Power Nominal current per phase Nominal line to line voltage Frequency Dissipated power Cooling 1 2 3 Load Categories of use Connections Load configuration 1 2 4 Signalling 1 2 5 Dimensions Thyristor unit variant 4 see Standard EN 60947 4 3 for uninterrupted service 16 A to 160 A at 45 C see product code 200 V to 500
54. ssioned and maintained by qualified personnel authorised to work in an industrial low voltage environment Users must not attempt to access internal parts The heatsink temperature may exceed 100 C The heatsink remains hot for approx 15 minutes after the unit is shut down Avoid touching the heatsink even briefly while the unit is operating 7 2 MAINTENANCE Every six months check that the power and protective earth cables are correctly tightened see Wiring section page 2 6 If the load parameters change the operation of the PLF detection must be diagnosed see DLF option section e If a DLF alarm occurs check the load wiring and condition of contacts Use the push button to confirm the DLF alarm diagnosis see page 5 10 To ensure that the unit is cooled correctly the heatsink should be cleaned regularly depending on how dirty the environment is as should the fan protection grille for fan cooled units rated at 125 A or more Danger The thyristor unit should be cleaned only when powered down and at least 15 minutes after stopping operation 7 2 7300A User Manual Maintenance 7 3 THYRISTOR PROTECTION FUSES The thyristors in the 7300A power thyristor unit are protected against excess currents by high speed fuses for all load types other than short wave infrared elements For current ratings x 100 A the fuses are external The product code specifies whether or not a fuse is present
55. ternal power supply 115 V or 280 V 10 15 depending on order code Consumption 10 VA Analogue digital communication optional either remote analogue setpoint 0 5 V or 0 10 V 100 KQ input 0 20 mA or 4 20 mA 250 Q input or manual setpoint potentiometer 5 V user voltage output available max 2 mA e Burst mode base time 16 or 64 cycles Single cycle 1 base cycle Advanced single cycle 1 base cycle firing by whole cycles non firing by half cycles not available for 3S and 3D three phase load configuration Phase angle e Standard on balanced three phase supply Load voltage squared V Option Apparent power V I with mean of 3 phase currents Mean of square of 3 load currents 1 in Phase angle mode Open loop in Phase angle mode Better than 2 of full scale Option depending on firing mode Phase angle Automatic control transfer V2 lt P op V I IA Current recalibration set by potentiometer on front panel Burst mode 16 cycle base Current limit with threshold set by potentiometer on front panel After each power up or after stopping firing for 5 s or more Burst mode firing with Phase angle limiting A control signal is available in V I control for power and current calibration and for maintenance Option to control transformer primaries in Burst mode Magnetisation ramp in phase angle variation on first power up Adjustable delay for first firing 7300A User Manu
56. th the ICO option The over load alarm cut off is memorised The thyristor unit remains cut off and signals the alarm status The Over load alarm may be acknowledged by applying 5 V to the ACK terminal on the DIG IN terminal block logic signal inputs The internal supply 5VD terminal or an external source may be used to acknowledge the alarm remotely 7300A User Manual 5 7 Alarms 5 9 STANDARD ALARMS 5 9 1 Faults detected These alarms monitor the following faults supply voltage absent on one or several phases supply frequency outside operating limits neutral reference voltage absent in Star with neutral configuration code 4S Over Heating for units gt 125A The supply voltage absent alarm may be caused by supply network faults blown thyristor or supply protection fuses open circuit breakers or line contactors The neutral reference voltage absent alarm may be caused by loss of the link to terminal 21 EXT terminal block external reference voltage or by a blown fuse in the connection to the supply neutral see figure 2 9 5 9 1 1 Availability Supply fault monitoring voltage absent or frequency out of range is fitted as standard to all 7300A thyristor units including Base version units The neutral reference voltage is automatically monitored under the following conditions e Star with neutral load configuration code 4S is used and the DLF or and power control code VICL options are
57. the following firing modes e Phase angle codes V2CL and VICL PA e 16 cycle Burst mode with current limit codes C16 V2CL or VICL The start up ramp approx 16 cycles is applied on the first firing after the thyristor unit is powered up and after the firing is cut for more than 5 seconds The initial firing angle is approx 6 After the ramp the firing angle corresponds to the setpoint in Phase angle mode in Burst mode the thyristors fire fully once the ramp is complete Supply voltage Current voltage LA E P n p 1 RA PA P y ME Eod EE Pon t l x 1 1 1 1 Initial b K firing angle V V V V Figure 3 6 Start up ramp resistive loads 3 6 2 Magnetisation ramp XFMR option For inductive loads the safety ramp prepares initial magnetisation To avoid saturating transformers on power up the safety ramp acts as a magnetisation ramp With the XFMR option after this ramp the first burst mode firing cycle starts with the first firing delay Supply Voltage Load Voltage Load Voltage lt gt gt lt Magnetisation gradiant Delay for first firing Figure 3 7 Transformer primary power up in Burst mode XFMR option Example Star with neutral load configuration code 4S 3 6 7300A User Manual Control Limits Chapter 4 4 CONTROL AND LIMITS Conten
58. the product code It also possible to combine the power supply for electronics and the power supply for the fan 115 V or 230 V both the same Protection and cut out installed by user 12 Supply Network L3 EUROTHERM 7300A ee 0 L 2 11 4 72 6 T3 Y Oon N O HEAT Fuse 1A 21 32 33 Sea Power supply for 16 17 18 electronics and fan terminal block 7 7 1 Figure 2 13 Wiring example for the external auxiliary power supply for electronics and the fan code 230V 7300A User Manual 2 11 Installation 2 5 5 Alarm relay contact alarm option If one of the alarm options is fitted an alarm relay contact is available on the ALR terminal block see figure 2 14 The type of contact closed or open on alarm is determined by the product code Contact switching capacity 0 25 A maximum 250 Vac or 30 Vdc Important The type of contact closed or open on alarm determines the terminal numbers in accordance with standard EN 60947 4 3 as shown on figure 2 11 Terminal Labelling Contact Type Terminal e g number contact closed Closed on alarm 71 and 72 on alarm Open on alarm 73 and 74 Alarm contact connector alarm relay contact Figure 2 14 Typical alarm relay contact connections 2 12 7300A user Manual Installation 2 5 6 Acknowledgement signal ICO option With the ICO option the alarms listed below may be acknowledged with a 5 V signal applied to
59. tocol Without Communication 12 Delay on first firing 18 Transmission speed Burst firing C16 or C64 Without communication XXXX Transformer primary Code MOP transmission speed Other configurations 9 6 KBauds 19 2 KBauds 13 Load Monitoring 19 Certification option Serious Alarms No certificate of Compliance with Order NONE Thyristor short circuit Certificate of Compliance with Order CFMC Total Load failure over temperature for ratings 125 A 20 Warranty extension Partial load failure and Without warranty extension NONE Serious alarms Warranty extended to 5 years WL005 No alarms 14 Load type With DLF option Short wave infrared SWIR Low temperature coefficient load LTCL Without DLF option or High temperature coefficient load XXXX 15 Over Load Alarm with DLF option Alarm in burst firing mode only except codes SWIR XFMR VICL V2CL and PA No over current alarm 16 Alarm relay contact With alarm option Contact closed on alarm Contact open on alarm Without alarm option 7300A User Manual 1 11 Identification 1 12 7300A User Manual Installation Chapter 2 INSTALLATION Contents 2 1 Safety during installation 2 2 Leer ata 2253 2 pare een eres e ed RERO Ada 2 2 1 Types of mounting 2 2 2 Attachment plates 2 2 3 Mounting on DIN rails 2 2 4 Bulkhea
60. ts and is thus less annoying on the eyes e Standard single cycle T or Ty 1 cycle e Advanced single cycle Typ 0 5 cycles Tu reduced 66 6 power F 2 Twp 66 6 power Te 2 Typ Te Tur Figure 3 4 Exemple of Single cycle and Advanced sigle cycle firing mode 3 4 7300A User Manual Firing modes 3 5 PHASE ANGLE Code PA In Phase angle mode the power delivered to the load is controlled by firing the transistors over a part of each supply half cycle Control involves varying the thyristor opening angle o The thyristor firing angle 0 varies with the setpoint signal The load voltage vj and current ij depend on the three phase load configuration a Resistive Load 4S or 6D b Inductive Load 4S or 6D Figure 3 5 Voltage and current in one phase of a three phase load code 4S or 6D in Phase angle mode a resistive load b inductive load 7300A User Manual 3 5 Firing modes 3 6 SAFETY RAMP The safety ramp involves progressively increasing the thyristor firing angle in order to apply the voltage and current to the load smoothly and thus reduce the start up current of loads which have a low resistance when cold and inductive loads Phase angle mode allows the firing angle to be progressively varied on start up acting as a safety ramp 3 6 1 Start up ramp The start up ramp is active in
61. ts Page o 32293 PRAE EIUS E mda ur aie Mdb eee 4 2 4 1 1 Control parameters 4 2 4 1 2 Input Output FAO 4 1 24 vr tac 4 2 4 2 Limitation adjustment options 4 3 4 2 1 Current recalibration options without power control 4 4 SEINES M 4 4 Settings With ICO option do ERPIEG desea 4 4 4 2 3 Current and power limitation 4 5 4 3 Current and power specifications options 4 5 7300A User Manual 4 1 Control Limits 4 Chapter 4 CONTROL AND LIMITS 4 1 CONTROL 4 1 1 Control parameters 7300A power thyristor units use one of the following control parameters e rms load voltage squared V2 rms load current squared I power delivered to load P Open Loop OL The parameters are defined and explained in the table below Control Definition Code V2 Compensation of supply voltage variations V2CL Compensation of supply voltage variations with current limit VICL Power control with current and power limits I2 Current squarred control Only available with Phase Angle Mode code PA OL Open loop no control The output is the image of the setpoint Only available with Phase Angle Mode code PA Tableau 4 1 Control parameter use For the Base version with no options the standard control parameter is V2 The control parameter must be selected when ordering and forms part of t
62. y of 0 5 Hz instead of being steady on Bit 8 of the General Status Word is set to 1 and will be set to 0 when next read Setpoint after time out STO used to set the setpoint used if the time out is exceeded Authorised values are between 0 and 255 stored in permanent memory The value in the Setpoint after time out parameter is transferred to the active setpoint if its value is higher 6 6 Remarks If one parameter has no signification for the power unit used the returned value is 1 e g Current limitation on front panel on a basic version For functioning safety reason only some changes on the firing and control modes are allowed Basic unit no option except digital comms or unit with DLF option and overload alarm ICO the digital communication option allows For the firing modes the changes between AP FC1 C16 C64 and SCA For the control modes no changes are allowed if the firing mode is a burst firing on the other hand in phase angle the switch from U2 to Open Loop OL is allowed For other unit configuration the digital communication option allows 6 10 7300A User Manual Digital Communication For the firing modes the switch between FC1 C16 C64 SCA to PA or HC16 but not the other way round It also allows the change between FC1 C16 C64 and SCA or between PA or HC16 see note 7 For the control modes If the unit is configured in PA the following changes ar
63. y round in the opposite direction to the arrow Lmax 20 of Ip 2 Set the thyristor unit firing with 100 setpoint 9 ne the current value and use the I lim potentiometer to set the desired value of Trax new thyristor unit rating Current setting with ICO option In Burst mode with the ICO option the I lim potentiometer is used to set the over load alarm see page 5 8 Over load detection is signalled by flashing the red ICO LED To adjust the setting 1 Turn the I lim potentiometer fully round in the direction of the arrow I 100 of Ip 2 Set the thyristor unit firing with 100 setpoint 3 Rotate the I lim potentiometer one turn at a time at 5 second intervals in the opposite direction to the arrow until the ICO indicator starts flashing 4 Rotate the potentiometer in the direction of the arrow by approx 2 turns and acknowledge the alarm settings calibration for the nominal load current used Important If spurious alarms occur rotate the I lim potentiometer in the direction of the arrow one turn at a time until the alarms cease 7300A User Manual 4 3 Control Limits 4 2 2 CURRENT AND POWER LIMITATION With the contol option VICL the following are available I lim current calibration potentiometer VI lim power calibration potentiometer HRC calibration control signal on the ADJ CAL terminal block Recalibration is possible curr

Three Phase Power Thyristor Units User Manual - E

Contents

Download Pdf Manuals

Related Search

Related Contents