multipoint earth leakage relay cbs-8 series user's manual ( m 981
Contents
1. f you are using the RS485 232 converter with RTS control ability code 770208 then the connection of the pin 7 in the RS 232 side is not required Central of residual current relays CBS 8 Page No 32 10 3 MODBUS Protocol The CBS 8 apparatus can communicate by means of the MODBUS protocol as it is following described When the CBS 8 communicates with MODBUS protocol it uses the RTU mode Remote Terminal Unit Each 8 bits byte in a message contains two 4 bits hexadecimal characters The format for each byte in RTU mode is Code 8 bits binary hexadecimal 0 9 A F 2 hexadecimal characters contained in each 8 bits field of the message Bits per Byte 8 data bits CHECK ERROR Field CRC type Cyclical Redundancy Check MODBUS FUNCTIONS IMPLEMENTED IN THE CBS 8 FUNCTION 03h amp 04h Reading n WORDS 16 bits 2 bytes This function permits to read all the parameters from the CBS 8 FUNCTION 06h Writing one WORD 16 bits 2 bytes into a memory position FUNCTION 10h Writing n WORDS 16 bits 2 bytes into consecutive memory positions Central of residual current relays CBS 8 10 3 1 Readout registers To read these type of registers use the or 04H MODBUS function Two kind of data is saved into the CBS 8 on board memory Page No 33 Parameters Involve all information provided by the CBS 8 related to me2. 26 b TECHNICAL SPECIFICATIONS 27 722 SAFETY CONSIDERATIONS 29 8 MAINTENANCE nte 29 9 TECHNICAL SERVICE te 29 10 CBS 8 COMMUNICATIONS eben 30 10 41 TO take Into a nud 30 10 2 Connection of a RS 485 network to a PC 5 232 31 10 3 MODBUS Protocol 32 10 9 1 Readout registers 33 registers rebar 35 10 3 3 Self reclosing feature 35 Central of residual current relays CBS 8 Page No 2 1 CHECKING THE CONTENTS OF YOUR PACKAGE This manual is aimed to familiarize the user with the operation of the central of residual current relays model CBS 8 in order to get the best from its features After receiving the analyzer please check the following points a The delivered material meets your order specifications b c The standard set includes the pertinent user s manual 9 After unpacking check that the instrument has not been damaged transit CD with software Easycomm 5 8 The manual you hold in your hands contains information and warnings about the CBS 8 that the user should re
3. 596 Test conditions Current transformers not included Temperature between 5 C and 45 C Mechanical characteristics Case material Self extinguishable plastic Connection Metallic terminals with posidraft screws Mounting To fit onto symmetric DIN 46277 EN 50022 rail Possibility of screw fixing 4 2 mm 2 passing hole for fixing Frontal cover Made of lexan Protection Assembled unit IP 41 Terminals IP 20 Dimensions 140 x 70x 110 mm 8 module size as per DIN 43 880 Weight 0 560 kg Central of residual current relays 5 8 Page No 28 Output relays characteristics Maximum switching voltage 250 Vac Maximum switching current Safety Class 300 V a c EN 61010 Protection against electric shock by class double insulation Standards IEC 1008 IEC 1010 IEC 255 5 UNE 801 2 UNE 801 3 UNE 801 4 UNE 60730 1 UNE 61010 Dimensions 0000000000 0 A 110 45 NS 140 gt 4 o b Central of residual current relays 5 8 Page No 29 7 SAFETY CONSIDERATIONS The user should take into account all installation instructions indicated in sections INSTALLATION amp STARTUP and TECHNICAL SPECIFICATIONS of this manual
4. ALARM Al 81 sz s Supply 6 m 76 7 A 5 151 19 1 152151 151 152152 151 B 151 152152 151 151 152 152 151 7 ipn T 9 8 Page No 8 55 Central of residual current relays 5 8 Page 9 3 3 2 To function as a residual current protective device Coil 2 Coil 1 Te 900000000 Al b m ul GND EE 0 0000000000000 WG 2 1 J 252 252 o o 91251 251 152 152 amp 4 Central of residual current relays 5 8 Page No 10 4 OPERATION MODE The device is suitable for either 50 Hz and 60 Hz power systems so that the user must previously set it to the rated frequency of the working network See Section 5 1 1 This instrument can be either used to function as an earth leakage current meter or like a complete residual current protective system The choice will depend on whether the relay outputs of the different channels are connected residual current protection or not earth leakage current m
5. get all the parameters in one central point of reading The CBS 8 has a serial RS 485 output so if we connect more than one device to the same communication line we have to assign to each discrete analyzer a different code or direction from 01 to 255 since the PC needs the identification of every measuring point 10 1 To take into account PROTOCOL MODBUS Question Answer CBS 8 DEFAULT CONFIGURATION 001 9 600 8 bits 1 bit Available baud rates 4 800 9 600 19 200 bauds RS 485 Output Terminal No Signal The RS 485 connection will be carried out by means of a twisted and screened cable with a minimum of 3 wires with a maximum distance between the CBS 8 and the last peripheral of 1 200 m The CBS 8 uses a RS 485 communication bus that enables the connection of a maximum of 32 devices in parallel multi point bus per each single port used in the PC Central of residual current relays CBS 8 Page No 31 10 2 Connection of a RS 485 network to a PC RS 232 RS 232 DB 9 7 5 O 3 2 Tiama ii imi ay CONVERTER RS 232 RS 485 CVM 000 00 Pe 8 69506 00
6. 0440 0444 0448 044C 20 0450 0454 0458 045C 0460 0464 0468 046C 0470 0474 30 0478 047C 0480 0484 0488 048C 0490 0494 0498 049C 40 04A0 04A4 04A8 0480 0484 0488 04 04C4 50 04C8 04CC 0400 0404 0408 040 04E4 O4EC 60 04 0 04 4 0500 0504 0508 050C 0510 0514 70 0518 051C 0520 0524 0528 052C 0530 0534 0538 053 80 0540 0544 0548 054C 0550 0554 0558 055C 0560 0564 90 0568 056C 0570 0574 0578 057C 0580 0584 0588 058C The format of the recorded event 8 bytes will be as follows 1 byte 5 te Tripping action date 4 byte 5 byte PE 6 byte Tripping current 7 byte Tripped channel 8 byte Not used Central of residual current relays CBS 8 Page No 35 10 3 2 Working registers Some actions can only be executed by means of communication commands These operations are completed using the function for writing one register Channel reset Question NPO6030XFFFFCRC Answer NPO6030XFFFFCRC Where X stands for the number of the channel 1 8 to be reset 0 All channels Deleting the file of event logs Question NPO6030EFFFFCRC Answer NPO6030EFFFFCRC 10 3 3 Self reclosing feature One of the features of the CBS 8 is the possibility of enabling the reconne
7. double insulation Mounting AN The Instrument is to be onto DIN 46277 EN 50022 rail All connections keep inside the cabinet Note that with the instrument powered on the terminals could be dangerous to touching and cover opening actions or elements removal may allow accessing dangerous parts Therefore the instrument must not be used until this is completely installed The instrument must be connected to a power supply circuit protected with gl type IEC 269 or M type fuses rated between 0 5 and 2 A This circuit should be provided with a circuit breaker or any equivalent element to connect ON or disconnect OFF the instrument from the power supply network Central of residual current relays 5 8 Page No 7 3 2 CBS 8 connection terminal according to specification in lables Description Concept 1 28 Power Supply Power supply 230 V a c A1 A2 COM CBS 8 RS 485 connection to PC RS 485 RS 232 converter 9 common S2 S2ofChamels56 7 amp 8C T s 8 16681 Z o Z NOTE Current inputs are suitable only for WG or WGP series transformers 3 3 5 Central of residual current relays CBS 8 8 connection drawings 3 3 1 To function as an earth leakage current meter O 000 0 27 26 25 23 22 21 20 7 16 15 TEST TEST2 COM PL2 PL3 ALS
8. contains information and warnings that the user should respect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions The instrument must not be powered and used until its definitive assembly inside the switchgear cabinet If the instrument is not used as manufacturer s specifications the protection of the instrument can be damaged When any protection failure is suspected to exist for example it presents external visible damages the instrument must be immediately powered off In this case contact a qualified service representative 3 1 Installing the CBS 8 Before powering the apparatus up please check following points a Power supply see the lable stuck in the side of the instrument Standard supply Single phase 230 V a c On demand other supply voltages Frequency 50 60 Hz Supply tolerance 2 20 96 15 96 Connection terminal Terminals 1 28 Power supply Burden 4 VA Central of residual current relays 5 8 Page No 6 b Maximum admissible current according to the associated transformer 30 WGPxx 300 mA 30 Operation conditions Operation temperature 10 C to 50 C Relative humidity 5 95 HR non condensing Altitude below 2000 m Safety Designed to meet protection class lll 300 V a c as per EN 61010 Protection against electric shock by class
9. m CIRCUTOR MULTIPOINT EARTH LEAKAGE RELAY CBS 8 SERIES USER S MANUAL 981 581 010 CIRCUTOR S A Central of residual current relays CBS 8 Page No 1 CBS 8 USER S MANUAL CONTENT page 1 CHECKING THE CONTENTS OF YOUR 2 22 GENERAL REA TURES lieu rates redes 3 3 INSTALLATION ANE STARTUP ut bm P 5 Cm 5 3 2 CBS 8 connection terminal according to specification in lables 7 3 3 CBS 8 connection 05 8 3 3 1 To function as an earth leakage current meter 8 3 3 2 To function as a residual current protective 9 4 OPERATION ate eta ctu o due tei d co e edat 10 4 1 Normal ode 40 LL c testi DEL 11 42 5 ModE er 14 4 3 ccm 16 4 4 Setup MOOG 17 5 USBRPNG UP THE CBO 9 18 NE CARMEN SS MING ss roth Es 18 5 1 1 Common parameter 19 5 1 2 Channel setting sos niente SR ERG ORI MN SE ed 20 5 2 Communication setting ete Pci ER Re etae eo sero rM 25 5 9 On board Clock
10. of taking decisions about the action to be executed For this purpose it has 8 input channels 8 relay type outputs 1 per each channel one configurable pre alarm output and one test output The measurement of the earth leakage current is accomplished by the calculation of the true RMS value over 1 cycle sliding window If this measured value user programmable during an also user programmable time period then the pertinent relay output would be activated exceeds the allowable threshold Depending on the CBS 8 programming the user will be able to set a series of delay times to define the schedule of self reclosing actions executed by the CBS 8 in case of an earth fault event This option can only be activated by using the software Easycomm CBS 8 included in the product package The CBS 8 has one LCD display that permits the user to view the instantaneous RMS value of the earth leakage as well as the relay status at each of the 8 channels of the CBS 8 OTHER FEATURES Low size instrument for DIN rail mounting True RMS measuring mode Measurement of earth leakage currents at 8 single channels Relay for pre alarm purposes Events log RS 485 communication to PC Possibility to program automatic reconnection via RS 485 Central of residual current relays CBS 8 Page No 4 Central of residual current relays 5 8 Page No 5 3 INSTALLATION AND STARTUP The manual you hold in your hands
11. on the user defined programming NOTE If the message max would be shown in display during the normal operation this means that the measured value of the earth leakage current is higher than user programmed value of the tripping threshold Central of residual current relays 5 8 Page No 12 Push buttons The 4 built in push buttons permit the user to execute following actions when working in this operation mode RESET Push button By pressing this push button during 3 seconds the CBS 8 will enter the reset menu that allows to unlatch one by one all activated relays Additionally all counters of time and self reclosing actions will be reset to zero TEST Push button Access to the Test mode By pressing this push button during 3 seconds the CBS 8 will perform an auto test of the selected channel and will check the output status the indicating leds the electronics and the connections between the transformers and the CBS 8 MODE Push button By pressing this push button the CBS 8 will alternatively change the visualization mode in the LCD Following enumerated messages will be shown in screen during few seconds to indicate the visualization mode selected by the user UIS 1 The value of the residual current in every channel is alternatively displayed in screen also indicating the status of the associated relay activated or not UIS 2 Display of the value of the residual current in the active cha
12. 0 8 1 Note when the tripping threshold is 30 mA only a delay time of 0 02 5 can be chosen The delay times that can be selected directly by means of the frontal keyboard of the instrument are the ones shown on the previous table However via communications a much wider range of times can be selected up to 10 s Central of residual current relays 5 8 Page No 23 Type of relay output Two values are available for their choice to define the normal position of the relay nO for normally open outputs and nC for normally closed outputs C IPG 2 ric Normally open Normally closed 5 1 2 3 Self reclosing actions Following outlined options will be only available in case that this option has been previously enabled through the software Easycomm CBS 8 appropriate communication commands MODBUS commands Delay time between successive reclosing actions iP i ngen er Value between 1 and 900 5 Central of residual current relays 5 8 Page No 24 Type of delay time between successive reclosing actions The application of delay times between successive reclosing actions gives rise to two reclosing modes Normal The delay time between successive reclosing actions is equal to the value set by the user in the previous parameter Exponential After each self reclosing attempt the delay time to be waited until t
13. Note that with the instrument powered on the terminals could be dangerous to touching and cover opening actions or elements removal may allow accessing dangerous parts This instrument is factory shipped at proper operation condition 8 MAINTENANCE The CBS 8 does not require any special maintenance No adjustment maintenance or repairing action should be done over the instrument open and powered and should those actions are essential high qualified operators must perform them Before any adjustment replacement maintenance or repairing operation is carried out the instrument must be totally disconnected from any power supply source When any protection failure is suspected to exist the instrument must be immediately put out of service The instrument s design allows a quick replacement in case of any failure 9 TECHNICAL SERVICE For any inquiry about the instrument performance or If any failure happens please contact to CIRCUTOR s technical service CIRCUTOR S A After sales service Lepanto 49 08223 TERRASSA BARCELONA SPAIN Tel 34 93 745 29 00 fax 34 93 745 29 14 E mail central circutor es Central of residual current relays CBS 8 Page No 30 10 CBS 8 COMMUNICATIONS allt LJ R 55999 amp mf One or some CBS 8 units can be connected to a PC With this system we
14. Three baud rate values are available for their choice 4800 bauds 9600 bauds 19200 bauds Baud rate Central of residual current relays CBS 8 Page No 26 Data bits PSES This value is always set at 8 Parity PS J Pre 87 parity gt none Even parity even Odd parity gt odd Stop bits PSEY 58 1 or 2 stop bits 5 3 On board clock setting To set the CBS 8 on board clock just simultaneously press the keys and SELECT Once accessed then the time and date of the on board clock can be modified as below described MODE push button to move along menu options SELECT push button To validate the selected option RESET SELECT push buttons To validate and exit the clock setting Central of residual current relays 5 8 Page No 27 6 TECHNICAL SPECIFICATIONS Power supply see specifications on the side of the CBS 8 CBS 8 Single phase 230 V a c Voltage tolerance 15 20 Frequency 50 60 Hz BURGE 4VA Operation temperature 10 to 50 C Measuring circuit Current range According to the associated transformer 30 WGPxx 300 mA 30A Measuring mode True RMS value Sampling time 1250 us Pre alarm Delay time 500 ms Hysteresis 50 Accuracy in current lt 15 Accuracy class CIBEEBPIE
15. annel tripped off Channel closed nont r LH In case of not pressing any key for more than 30 seconds then the equipment passes automatically to normal mode without reclosing any relay Push buttons Once in reset mode the function of the buttons will be RESET push button exits this mode MODE push button to choose the channel to be reclosed SELEC push button recloses the selected channel Central of residual current relays CBS 8 Page No 17 4 4 Setup mode This mode is used program the CBS 8 To enter this mode push simultaneously MODE amp SELECT For the time in which the equipment is in setup mode the power lines will be permanently controlled considering the parameters selected before entering this mode The multipoint scanning system CBS 8 has an external switch to protect the modification of the setup switch PROG Switch PROG Depending on the position of this switch the user will be enabled to Up sealable position the CBS 8 setup mode can be entered but not modified Down The CBS 8 setup mode can be accessed and the modification of any programming parameter is enabled Push buttons The push buttons in this mode permit the user to execute following actions RESET push button exits without saving any modification MODE push button changes the selected menu option SELECT push button to validate th
16. asurements and output relays status Logs These records store the last 100 operations executed by the CBS 8 Parameters Description Unit MODBUS REGISTERS HEXA DECIMAL longs Channel 1 2 3 4 5 6 7 8 Date 0000 0001 Residual current mA 0002 0003 004 0005 0006 0007 0008 0009 OzNot tripped Output status 2 000A 000B 000 0000 000 000 0010 0011 Tripped 3 Latched Pre alarm relay 0 Diactivated 0012 status 1 Activated 0013 0014 0015 0016 0017 0018 0019 001A Latest saved record 001B Operation mode 001C switch PROG race 001D Software version 001E 0 Diactivated Pre alarm ON 1 Activated 001F 0020 0021 0022 0023 0024 0025 0026 Date format _ Seconds b6 b11 Minutes b12 b16 Hour b17 b21 Day of the month b22 b25 Month b26 b31 Year 2000 Logs in memory Central of residual current relays CBS 8 Page No 34 Relay tripping events are recorded in the CBS 8 on board The structure of this data in memory consists of 4 register blocks The below table shows the initial and ending reading registers Event 0 1 2 3 4 5 6 7 8 9 00 0400 0404 0408 040C 0410 0414 0418 041C 0420 0424 10 0428 042C 0430 0434 0438 043
17. ction self reclosing of those channels that have been tripped off To enable this option the software CBS 8 has to be used The software can be foung in the product package The instruction manual can be also found in the enclosed CD
18. e option in screen MODE SELECT push button To start the normal operation according to the new programming Central of residual current relays 5 8 Page No 18 5 SETTING UP THE CBS 8 The setup procedure of the CBS 8 is accomplished by means of several SETUP options 8 To access the setup menu the keys and SELECT must be simultaneously pressed from the normal operation mode see 4 4 for more details When accessing the SETUP the initial screen permits the user to select among the channel characteristics setting or the communications settings Channel configuration C SEr Communications configuration The selected option blinks The MODEkey allows to scroll over the configurable options The SELECT key to validate his choice JRESET to exit the setup without storing any change MODE amp SELECT are used to confirm the new setup and return to normal mode 5 1 Channel setting Once into the SETUP use the keyboard to select different options and set desired values PCH Prg Where P CH indicates common user configurable parameters P CH1 P CH8 Single setting of each channel Central of residual current relays CBS 8 Page No 19 5 1 1 Common parameter setting User configurable points are th
19. ent Itis not allowed to make any change in the configuration RESET SELECT Push button To set the time of the CBS 8 on board clock The 5 built in leds in the CBS 8 indicate following parameters Cpu Led Lights on when the CBS 8 is running Comm Led Blinks when any communication is established via the serial RS 485 communication channel Rd Led Lights on when automatic self reclosing actions are enabled Led Lights on when any channel is tripped It will flash in case that in any channel the prealarm condition is accomplished having no other channel tripped off Ed Led Lights on when any channel is latched Central of residual current relays CBS 8 Page No 14 4 2 Test Mode This mode is used to check the functioning of the link between toroid amp CBS 8 the relay outputs the internal electronics of the device and the frontal LED During the test procedure the CBS 8 stops the line surveillance This mode will be entered by pressing the TEST button for more than 3 seconds when the instrument is running in normal mode The test procedure is based on the injection of an external current through the test terminals of the transformer that simulates a current fault tripping off the relays related to the selected channels The result of the transformer CBS 8 connections check can be noticed from the different messages that will be shown in display m 5 7 L 8 cha
20. ese below enumerated 1 Network rated frequency 2 Pre alarm relay type 3 Pre alarm threshold Network rated frequency For a right operation of the instrument it is necessary to set the network rated frequency since duration of one semi cycle is different in a 50 Hz or 60 Hz power system Hz E M LI Pre alarm threshold The minimum tripping threshold of the 8 channels can be set from the 5096 and the 10095 in 10 steps P B Central of residual current relays CBS 8 Page No 20 Pre alarm relay type Two values are available for their choice nO for normally open outputs and nC for normally closed outputs C P2 ric Normally open Normally closed 5 1 2 Channel setting Each of the 8 discrete channels of the CBS 8 must be particularly user programmed as below described In case that the CBS 8 is used just as an earth leakage current meter then only the type of transformer connected to each channel and the tripping threshold must be set 5 1 2 1 Selection of the type of transformer connected to each channel Three values are here available for their choice 4 I fi Prg LI A C IPF d ISR FEC Not used WG 30 mA 3A WGP 300 mA 30A Central of residual current relays CBS 8 Page No 21 5 1 2 2 Tripping charac
21. eter The 8 has diverse operation modes Normal mode The CBS 8 functions as an earth leakage current meter In case that the relay outputs are connected then it will function as a residual current protection system Test mode Execution of an analysis of the transformer CBS 8 connections together with a test of the indicating leds Reset mode allows the reconnection of the channels that have been previously tripped off Setup mode To accomplish with the CBS 8 programming actions When the CBS 8 is powered on the normal mode will be always the active operation mode The CBS 8 incorporates 4 keys and 5 indicating leds whose function will vary according to the operation mode The CBS 8 is equipped with an on board non volatile rotary memory to save last 100 events into Every log will contain information about Date Tripped channel Tripping residual current Central of residual current relays 5 8 Page No 11 4 1 Normal mode The instrument has a 2 line LCD CBS 8 Reset Test A Mode select When the CBS 8 is powered on you can view in display some information about the instrument itself CbS8 Software version and following you will view FrEC XX 2 Network frequency user programmed After some seconds the instrument is ready for its regular operation and shows one of the available screens depending
22. he next self reclosing attempt follows this rule trec 2 where n stands for the number of self reclosing attempts occurred until the present moment and trec stands for the delay time set by the user in the previous parameter C IPB mor Exponential Number of self reclosing attempts 9 value between 0 and 10 attempts The user can define the maximum number of self reclosing attempts to be executed by the CBS 8 If this number is completed without any successful attempt then the referred relay will keep latched until a manual or remote reset action is executed Note if the programmed number of reconnections is 0 then the self reclosing will be disabled Central of residual current relays CBS 8 Page No 25 5 2 Communication setting When the user choose the option C SEr then the menus that permit him to modify all those parameters related to serial communications are accessed Following screens are successively shown in display Peripheral number identification code Peripheral number of each CBS 8 within the MODBUS communication network PSEL TLI Prg Peripheral No between 1 and 255 In this point the key Mode executes following actions Short touch The peripheral number is increased by 1 Long touch The peripheral number is increased by 10 PoE P 560d
23. nnel UIS 3 Indication of every channel status If the output is latched or tripped the screen of the indication of the relay status is alternated with other screen that shows the tripping setpoint programmed for this channel together with the value of the detected current which has caused the channel trip UIS 4 Data about the last earth leakage fault is shown in display The time and date of the leakage occurrence are alternately shown in one line and equally the number of the channel the leakage has been detected in and the value of the residual current are alternately shown in the other line JUlS 5 in only one screen the user can have an overview of which are the channels that have been tripped off 0 gt channel ON and 1 gt OFF or tripped Leds Central of residual current relays CBS 8 Page No 13 SELECT Push button The function of this push button will vary according to the user selected visualization mode UIS 2 or UIS 3 Mode the CBS 8 switches the displayed channel UIS 4 Mode to advance within the recorded logs MODE SELECT Push button If these two push buttons are simultaneously pressed then two different actions can be performed depending on the possition of the Prog switch Down enters the setup mode allowing the modification of any configuration parameter Up sealable position enters the setup mode allowing only to check or visualize the configuration of the equipm
24. nnel tested Er result of the test Correct or right functioning Wrong functioning Correct Error If no push button is pressed during 30 s then the normal operation mode is automatically set again without reclosing any latched relay Central of residual current relays CBS 8 Page No 15 Push buttons Once in the test menu the push buttons will allow the user to execute the following actions RESET push button exits this mode and enables the CBS 8 for its normal operation MODE push button to choose the channel to be tested SELECT push button begins the test of the selected channel Leds The CBS 8 also checks the correct operation of the indicating leds thus all the indicating leds should be on during the whole time that CBS 8 is in the test mode CBS 8 Reset n md Ed Select Central of residual current relays CBS 8 Page No 16 4 3 Reset mode This mode is used to reconnect the relay outputs that were tripped off During the setup procedure the CBS 8 goes on with its surveillance tasks over the different enabled channels To enter this mode press RESET for 3 seconds when the instrument is in normal mode In the screen the user can choose the channel over which the reset will be performed r 5L LH i No channel tripped off Ch
25. spect in order to guarantee a proper operation of all the instrument functions and keep its safety conditions Before powering the instrument for the first time verify following points a Power supply see specifications in the side stuck lable Standard 230 V a c Single phase 50 60 Hz On demand other supply voltages b Maximum admissible current according to the associated transformer WG or WGP Central of residual current relays CBS 8 Page No 3 2 GENERAL FEATURES The CBS 8 central of residual current relays is a DIN rail mounting apparatus that offers several operation possibilities which are selectable within its SETUP mode Before power supplying the instrument read the INSTALLATION AND STARTUP and SETUP sections and choose the most suitable operation mode in order to get your desired results 66 0 0 6 6 0 5 0 929 O6 28 27 26 25 24 23 22 21 20 19 18 17 16 Power RL RLS RL Supply TEST TEST2 com 2 AL4 5 5 7 8 ALARM A2 4 4111 Test A Mode 51 52 52 51 51 52 52 51 1 51 52182 St 51 52152 51 S sey T2 T3 5 16 7 1 2 3 4 5 8 7 8 9 10 12 13 14 O U O C XX X X O 0O C Ln ow 15 The CBS 8 is an instrument that measures calculates and displays the earth leakage current also with the ability
26. teristics For these instruments to be used just as earth leakage current meter only the tripping threshold value must be programmed Tripping threshold The user must set here the current value that will define the residual current relay trip output relay When the CBS 8 is to be used just as an earth leakage current meter only visualization functions the user must set the maximum value of earth leakage current that is to be measured end of scale This value is very important because if the user selects a value too high the instrument will lose accuracy and in case that it is too low the input will reach saturation and the measurement shown will be wrong Therefore it should be chosen depending on each specific application mS 830 16 different values can be chosen depending on the used transformer 30 mA 3 300 mA 30A 30 mA 700 mA 300 mA 50 mA 800 500 mA 8A 100 mA 900 mA 1A 9A 200 mA 1A 2A 10A 300 mA 1 5 15 400 2 4 20 500 2 5A 5A 25A 600 mA 3A 6A 30A Central of residual current relays 5 8 Page No 22 Delay time This is the period of time that the tripping threshold value must be exceeded by the earth leakage current to activate the output relay of the pertinent channel EE 8 different delay times be selected 0 02 0 04 0 06 0 08 0 1 0 4
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