v User information - Short-circuit and ground fault indicator MEg61.4+
Contents
1. RS485 E l 41205 MESA M c Energetick Apar ty 4 INSTALLATION PRINCIPLES Safety information Maximum attention must be paid to this information A Warnings draw attention to the facts constituting safety risks to the operator A Cautions indicate conditions and facts that may cause damage to the MEg61 4 indicator Explanation of symbols used in User Manual Danger electric shock risk Note in documentation Danger risk of danger Ground grounding terminal PP P code degree of protection provided by enclosure The product is intended for recycling and collection spots j Declaration of Conformity European Community CX om 20 Short circuit and ground fault indicator MEg 1 4 MESA A Warning Be sure that the operator performing the installation must be eguipped with and use personal protective eguipment and other safety devices Warning The installation of sensing elements at MV level is governed by spe cial regulations operating instructions and safety instructions not included in this manual When using the MEg61 4 indicator in a way not intended by the manufactu rer the protection provided by the MEg61 4 indicator may be impaired The MEg61 4 indicator is a Class A product designed for industrial environ ments It may cause radio interference in other environments The operator installing and disassembling the MEg61 4 indicator2. Short circuit currents I Rated value nom I measuring range I measurement accuracy Internal time Accuracy nom nom 0 8U SUSL 3U 0 001 sIs1 21I cos Q2 0 5 m 0 8U SUSL 3U 0 001 SI 121I cosQ x 0 707 mM 0 8U sUsS1 3U 0 021 lt 1 lt 121 cosoL 2 0 5 cos Q C 2 0 8 nomM nom 0 05pU sUsL3U 0 02s T 605 20 ms 20 Ios 1 21 to I m nomZ 10 of measured value 1 0sec 24hrs at ambient reference temperature PLL Phase Locked Loop frequency range 42 5 Hz to 57 5 Hz Note Measurement accuracies apply to the signal with fundamental frequency Overload capacity of current inputs 21 1 min 101 1 5 sec Short circuit and ground fault indicator MEg 1 4 MESA 3 CONSTRUCTION WIRING AND DESCRIPTION OF THE PANEL The MEg61 4 indicator is installed in a polycarbonate self extinguishing case with the dimensions of 108 x 90 x 63 mm designed for DIN rail mounting The transparent panel of the device can be sealed It is possible to deliver the MEg61 4 indicator for installation also in the plastic EURONORD case with overall dimensions 160 x 120 x 90 transparent plastic top cover and cable grommets for connection of measured and other signals The supply voltage fuse is located in the cover case as well On the unit s panel there is a green RUN LED light signalling the activity of the MEg61 4 indicator The red LED signalling the occurrence of a short ci
3. Installation case The basic MEg61 4 indicator unit can be delivered in the installation case with dimen sions 160x 120x 90 mm The installation case houses the OPVA10 1 fuse holder with 1 A fuse PVA10 In the lower part of the case there are grommets for insertion of cables The case is provided with a transparent cover to enable monitoring of the states of the indicating elements In Figure 14 there is an example of wiring for voltage inputs from MTN and for current inputs from PTD In Figure 15 there is an example of wiring for voltage inputs from capacitor dividers and for current inputs from PTD Diagrams for individual voltage and current input connections are used for other types of sensing elements Fig 13 Installation case dimensions 160 _ 121609 148 wo 90 T o al 8 30 i uh Y m 4 i 83 giS 78 T a4 Y Shortcircuit and ground fault indicator MEg61 4 MESA Fig 14 Installation case wiring for input voltages from MTN and for input currents from PTD Fig 15 Installation case wiring for input voltages from capacitor dividers and for input currents from PTD
4. MERCI software For connecting to the remote communication use the galvanically isolated serial interfa ce RS485 with integrated MODBUS protocol The contacts of the SC relay are closed when a short circuit overcurrent occurs At the same time the red SC LED starts flashing in a second interval The LED is lit for a short time The contacts of the GF relay are closed when a ground fault occurs in the downstream direction of the indicator At the same time the green GF LED starts flashing in a second interval The LED is lit for a short time When SC and GF faults occur the LI output controlling the external intensive light is released as well The states of indication can also be read out by means of the communication interface The states of indication can be cancelled after expiration of the set time 120 min as a standard by sending a command by MODBUS protocol via the RS485 bus or using the user software If the indication is reset while the short circuit is still present the indication re triggered immediately The USB or RS485 interfaces operate simultaneously If the indicator is interconnected with the computer by means of the USB cable the RS485 interface will not be blocked To prevent from conflicts with remote control it is necessary to disconnect the RS485 interface when local communication is requested The state at the INI IN2 inputs can be transmitted remotely by the MODBUS protocol To evaluate the recor
5. The external light signalling is fed from 12 V with the other pole MESA M c Energetick Apar ty Fig 1 MEg61 4 basic indicator unit dimensions Fig 2 MEg61 4 indicator rating plate 36 35 34 33 32 31 30 29 27 26 25 24 23 22 21 20 19 OOOOOOOO OOOOOOOQOO SC GF ouw mi 1 m2 FAULT INDICATOR USB RUN M MEg A EY mereme Rs485 z A mE a OOOOOOOOO OODDOOODUQ 123450789 10 11 12 13 14 15 16 17 18 Short circuit and ground fault indicator MEg 1 4 MESA Tab 1 Description of MEg61 4 indicator terminals Terminal Terminal PME Denotation number indication 1 I1 current input MTI PTD AMOS white sensor wire 2 Il I1 current input black sensor wire 3 Il current input MTI PTD AMOS red sensor wire 4 I2 current input MTI PTD AMOS white sensor wire 5 I2 I2 current input black sensor wire 6 I2 current input MTI PTD AMOS red sensor wire 7 I3 current input MTI PTD AMOS white sensor wire 8 I3 I3 current input black sensor wire 9 I3 current input MTI PTD AMOS red sensor wire 10 LI Output for external light signalling 11 12 L Common grounding 13 14 A DRS485 signal A 15 G DRS485 ground 16 B DRS485 signal B 17 12V Supply voltage 12V 18 L Supply voltage ground 19 In2 Signal input 2 20 L Ground for inputs common with power supply ground 21 Inl Signal input 1 22 o Outl Free relay contact outl 24 2s GF Free re
6. in preselected intervals P yinp Ground fault records consist of the curves containing 10 ms values and the curves conta ining individual samples of basic quantities The MEg61 4 indicator has input circuits specially designed for connection of various measuring converters and sensors The voltage can be connected from the measuring voltage transformer MTN from the capacitor or resistor dividers and from the electric field sensor The current can be connected from the measuring current trans former MTP from the split core current transformer PTD from the AMOS sensor Rogowski coil or from the magnetic field sensor The MEg61 4 indicator is provided with a possibility of connecting two input signals and one output signal Types of ground connection and short circuit faults are indicated by indicating lights on the instrument panel and with a free contact on the indicator ter MESA M c Energetick Apar ty minals It is possible to connect an external light signalling and external signalling reset It also includes the RS485 interface with MODBUS protocol A ground fault or a short circuit is signalled by interrupted light with the predefined activation time by relay contact closing or on request by means of the MODBUS proto col command 2 TECHNICAL PARAMETERS Reference conditions U y 12 Vpo ambient temperature 20 C relative humidity 4096 to 70 f 50 0 Hz measured voltages and currents with identical f
7. of the MEg61 4 indicator and is stored in the indicator s internal memory as well A shielded cable is used for connection of the input voltages from the resistor and capaci tor dividers and from the electric field sensor Connection of input voltages Fig 4 Connection of input voltages from MTN type 1 MVL3 MVL2 MV L1 MESA M c Energetick Apar ty Fig 5 Connection of input voltages from MTN type 2 MV L3 Fig 6 Connection of input voltages from resistor divider type 3 4 MV L3 14 Short circuit and ground fault indicator MEg 1 4 MESA Fig 7 Connection of input voltages from capacitor divider type 5 MV L3 MVL2 MV L1 Fig 8 Connection of input voltages from electric field sensor type 6 MV L3 MV L2 MESA M c Energetick Apar ty Connection of input currents Fig 9 Connection of input currents from MTP type 1 2 5 8 MVL af e we ep Ei e MV L3 Fig 10 Connection of input currents from PTD 20 mA type 3 MV L1 MV Insulation Short circuit and ground fault indicator MEg 1 4 MESA Fig 11 Connection of input currents from AMOSm Rogowski coil type 4 MV L1 MV Insulation MV Insulation MESA M c Energetick Apar ty
8. EMC requirements Part 1 General requirements 31 December 2006 CSN EN 61000 4 2 CSN EN 61000 4 3 CSN EN 61000 4 4 CSN EN 61000 4 5 CSN EN 61000 4 6 CSN EN 61000 4 9 CSN EN 61000 4 11 CSN EN 55011 ed 3 2010 Industrial scientific and medical equipment Radio frequency disturbance characteristics Limits and methods of measurement MESA M c Energetick Apar ty Voltage inputs 1 Transformer Rated value U Maximum measured value Measuring accuracy Maximum value 2 Resistor network Rated value U Maximum measured value Measuring accuracy Maximum value Input impedance 3 Resistor divider 22kV Rated value U Maximum measured value Measuring accuracy Maximum value 4 Resistor divider 35 kV Rated value U Maximum measured value Measuring accuracy Maximum value 5 Capacitor divider Capacitor divider range 100 V3V 120V better than 0 5 U om 150V 100 N3 V 120V better than 0 5 U om 150 V gt 1MQ 24V 20896U n better than 0 5 U om 26096U m 24V 20896U better than 0 5 U om 260 U om 8pF 150pF Number of internal amplification stages 8 Rated level of MV network 6 Electric field sensor Sensor location 22kV 35 kV under the wire Number of internal amplification stages 8 Rated level of MV network 22kV 35 kV Short circuit and ground fault indicator MEg 1 4 MESA Current i
9. M Short circuit and ground fault indicator MEg61 4 User manual 1D O 60 Or 0092999 di 12 erem SERE rm M c Energetick Apar ty a s 664 31 esk 390 Czech Republic Short circuit and ground fault indicator MEg 1 4 MESA Short circuit and ground fault indicator MEg61 4 1 INTRODUCTION The short circuit and ground fault indicator MEg61 4 hereinafter MEg61 4 indica tor only stems from well proven functions of the previous ground fault indicators of MEg61 4 series which were supplemented with new recording functions Thus one unit incorporates the ground fault indicator for MV levels where except for identification of faults and registration of fault states continuous monitoring and long term recording of monitored guantities is performed as well The MEg61 4 indicator identifies the segment of overhead line in which a ground fault or a short circuit overcurrent occurred The MEg61 4 indicator can be used for outdoor installation on MV overhead line poles or for installation in internal environment with cable MV lines Bolted arc and low impedance ground faults and all types of short circuits are indicated It is primarily designed for use in compensated MV distribution networks however it can be used in MV distribution networks with grounded neutral The MEg61 4 indicator measures and records the data related to voltages currents and owers in the non destructive electronic memory
10. al short circuiting terminal blocks Use a shielded cable for voltage connections use a two core cable for current connections 3 Connect 12V voltage with respect to correct polarity For installation of the in dicator in the installation case connect the positive pole of the power supply to the terminal of the built in fuse Connect the power supply cables with the power supply switched off 4 Use the communication cable to connect the MEg61 4 indicator with the master communication unit by means of RS485 line 5 Connect other cables to the relevant terminals if appropriate These are outputs of the relay contacts input binary signals resetting input and output to the external indication light 6 Check the light of the green RUN LED after power supply is switched on 7 Use the utility program to check if the output voltage and current are in phase If not use the short circuiting current clamps and interchange the beginning and the end of the input current lines 8 Use the utility program MERCI to set up necessary information for launching the indicator 22 Short circuit and ground fault indicator MEg 1 4 MESA 5 INDICATION AND CONTROL If the indicator is active the green RUN LED is lit steadily In the state of FW upgrade the green LED flashes in a second interval For detecting the state of the indicator its parametrization and reading out the current records the USB interface is used in collaboration with
11. ds use the DataViewer DVMEg program MESA M c Energetick Apar ty 6 INDICATOR COMPONENTS The MEg61 4 indicator incorporates these components Basic unit Installation box with fuse and fuse holder Sensing elements that can be connected to MV voltages and that provide the MEg61 4 indicator with input voltage and current quantities are described in separate manuals 7 MAINTENANCE REQUIREMENTS Besides protection against dripping water and usual cleaning of the unit and its panel the MEg61 4 indicator does not require any other maintenance The MEg61 4 indicator has no rotary or moving parts 8 METHOD OF DELIVERY HANDLING AND TRANSPORT Ihe place of delivery of the MEg61 4 indicator set if not specified otherwise is the manufacturer s place of business The components of the MEg61 4 indicator set are de livered in one box made of double wall corrugated board The boxes are recyclable The other accessory components are provided in packages corresponding to their weights and mechanical dimensions Based on the specification in the purchase order it is possible to send the MEg61 4 indi cator with accessories by the transport service chosen by the customer Due to the weight of the individual wrapped parts up to 15 kg no special measures are needed when handling the delivery Individual parts of the delivery are marked on their packages with the lists of components inside Short circuit and ground
12. fault indicator MEg 1 4 MESA 9 ORDERING DATA Basic Quantity of short circuit and ground fault indicators MEg61 4 Voltage level 22 kV level 35 kV level Voltage input type Current input type Transformer 1A 5A PTD transformer with split core 100A 200A 400A 500A 600A Rogowski coil AMOS 250A 500A It is possible to deliver by special request Plastic mounting case with grommets and circuit breaker The purchaser may place an order for training and calibration of the MEg61 4 indicator set with the manufacturer MESA M c Energetick Apar ty 10 WARRANTY Two year warranty is provided for the short circuit and ground fault indicator MEg61 4 and its accessories from its sale Defects incurred during this period due to a provably defective construction faulty workmanship or inappropriate materials will be repaired free of charge by the manufacturer and the place of performance is the seat of the manu facturer of the MEg61 4 indicator It is not permitted to open the MEg6I 4 indicator unit during warranty period The warranty becomes invalid if the user carries out unauthorized modifications or chan ges on the MEg61 4 indicator or on its accessories if he connects the indicator incorrectly or if the indicator was operated contrary to technical conditions The defects on the MEg61 4 originating during the warranty period shall be claimed by the user t
13. lay contact for ground fault 26 a SC Free relay contact for short circuit MESA M c Energetick Apar ty Terminal Terminal RENE Denotation number indication 29 U3 voltage input U3 S 30 U3 voltage input active signal 31 U2 voltage input t au 32 U2 voltage input active signal 33 UI voltage input Ul ge np 34 UI voltage input active signal 35 N Common point for input voltages D RS485 interface is galvanically isolated Tab 2 Types of voltage and current inputs Mn Input Number code Denotation Comments 1 Transformer U om 97 735 V MTN 2 Resistor network U 57 735 V MTN 3 Resistor divider 22 kV Voltage inputs 4 Resistor divider 35 kV 5 Capacitor divider 6 Electric field sensor 1 Transformer I 1A MTP 2 Transformer I 47294 MTP P nem 3 Input 20mA PTD inputs 4 Rogowski sensor AMOSm Magnetic field sensor PTD 100 A 200 A 300 A 400 A 500 A 600 A Rogowski sensor AMOSm 250 A 500 A Short circuit and ground fault indicator MEg 1 4 MESA Fig 3 MEg61 4 indicator rating plate MEg61 44 CEA I POWER 12V 20 80mA m s p Made in Eu Republic Connection of input voltages and currents The MEg61 4 indicator is set by the manufacturer for connection of input voltages and currents from the sensors indicated in Table 2 The type of input is marked with a number code This number code is indicated on the rating plate
14. must have qualifications for work near dangerous voltages The operator must be trained in giving first aid Ihe MEg61 4 indicator may only be operated by qualified personnel equipped with personal protection equipment against electrical injury It is not allowed to connect the indicator to voltages higher than 150 V other wise there is a risk of electrical injury The MEg61 4 indicator may only be maintained and repaired by the manufactu rer or service organizations trained by the manufacturer It is not permitted to use other accessories than those included in the MEg61 4 indicator delivery Caution The MEg61 4 indicator can be installed on the DIN rail by means of the plastic installation case with power supply fuse The confusion of voltage and current types of MEg61 4 indicator inputs and sensing elements used may lead to indicator malfunction Changing the type of voltage and current inputs can only be done by the manu facturer of MEg61 4 indicator 21 MESA M c Energetick Apar ty MEg61 4 indicator installation The MEg61 4 indicator can be available for DIN rail installation or in plastic installation case It is expected that the signals of already installed relevant sensors will be used 1 Check the type of inputs for voltages and currents whether they correspond to sen sing elements used 2 Connect the three phase voltage and current inputs Bring the current terminals through addition
15. nputs 1 Transformer 1A Rated value I Measuring range basic range Measuring range high range Measuring accuracy basic range Measuring accuracy high range 2 Transformer 5A Rated value I Measuring range basic range Measuring range high range Measuring accuracy basic range Measuring accuracy high range 3 Input 20mA Rated value I Measuring range basic range Measuring range high range Measuring accuracy basic range Measuring accuracy high range 4 Rogowski sensor Rated value I nom Measuring range basic range Measuring range high range 5 Magnetic field sensor Sensor location LA 2 to 120901 120 to 2000 I om 0 5961 0 1 of measured value 10 of measured value 2546 2 to 120901 120 to 2000961 0 5 I 0 1 of measured value 10 of measured value 20mA 2 to 120 1 120 to 2000961 0 5961 0 196 of measured value 1096 of measured value 250A 500A 2 to 1209601 120 to 2000 I under the wire Number of internal amplification stages 4 Current sensing range Rated level of MV network up to 300A 22 kV 35kV MESA M c Energetick Apar ty Active power Rated value P Measuring range Reactive power Rated value Qnom Measuring range Active energy Measuring range Voltage phenomena Rated value U measurement range RMS1 2 T measuring range T measuring accuracy
16. o the manufacturer of the indicator Claims without the warranty certificate enclosed will not be accepted The manufacturer bears in any case no responsibility for subsequent damages caused by using the MEg61 4 indicator No responsibility which would exceed the price of the MEg61 4 indicator follows for the manufacturer from this warranty 11 MANUFACTURER MEgA M c Energetick Apar ty a s 664 31 esk 390 Czech Republic Tel 420 545 214 988 e mail mega e mega cz web www e mega cz Short circuit and ground fault M indicator MEg61 4 User manual M c Energetick Apar ty a s 664 31 esk 390 Czech Republic www e mega cz
17. rcuit SC yellow LED signalling the occurrence of ground fault GF and another yellow LED signalling the state of output Outl or the occurrence of unsuccessful reclosure NOZ The USB mini connector designed for local communication is located on the unit s panel Lead connections for measured voltages currents power supply communication lines and others are carried out by screw terminals for wire cross section up to mm Measu red voltages are brought to their relevant terminals U1 34 U2 32 U3 30 common terminals 33 31 29 or possibly to N 35 36 Measured currents are brought to triplets of terminals IH 1 2 3 I2 4 5 6 and I3 7 8 9 whereas the input current terminal is marked with a dot The black wires of the magnetic field sensor are connected to terminals I1 2 I2 5 and I3 8 For a different type of cur rent sensor the terminals I1 2 I2 5 and I3 8 will remain unconnected and the input current will make use of terminals I1 1 3 I2 4 6 and I3 7 9 The supply voltage is connected to terminals 12V 17 and L 18 Terminals IN 19 21 are used for connection of the two valued input signal against the terminal 1 20 terminals 19 and 21 are positive The output signal SC 26 27 GF 24 25 Out1 22 23 is implemented by a relay contact For remote communication the RS485 interface at terminals 14 15 and 16 is used The external light signalling is connected to terminal LI 10
18. requency form a three phase system Basic parameters Supply voltage 12V e Supply current 80 mA 12V 100 mA max Protection rating IP20 Operating temperature 25 C to 60 C Relative humidity 2096 to 9096 at 40 C Weight 0 4kg Dimensions of the unit 108 x 90 x 63mm length x width x height Installation DIN rail TC35 35 x 7 5 mm Installation case 160 x 120 x 90 mm Terminal block max wire diameter 2 5mm Communication connector USB mini RS485 MODBUS max Baud rate 115 2 kbit s Number or galvanically isolated outputs 3 SC GF Outl maximum switched voltage 30V maximum switched current 30mA 30 Vee Number of inputs 2 dry contact Light activation time 2 hrs parametrizable 4 Short circuit and ground fault indicator MEg 1 4 MESA Data memory 4 MB 4MB flash Data memory organization circulate memory Recording interval from 1 sec to 15 minutes set by software Maximum number of recorded events 1024 Maximum length of recorded event curve 125 periods 250 values U RMS1 2 Fixed pre trigger 10 periods Fixed post trigger 20 periods Oscillogram 64samples period Oscillogram length selectable standard 8 periods Storage temperature 25 C to 80 C Protection rating IP20 accessible parts P00 inaccessible parts Pollution degree 2 Electromagnetic compatibility CSN EN 61326 1 2006 Electrical equipment for measurement control and laboratory use
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