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Siemens 7SG12 DAD-N Manual
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Siemens 7SG12 DAD-N Manual

Siemens 7SG12 DAD-N Manual

Reyrolle protection devices
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7SG12 DAD-N
Numerical High Impedance Relay with CT Supervision
Answers for energy
Reyrolle
Protection
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Summary of Contents for Siemens 7SG12 DAD-N

  • Page 1 Reyrolle Protection Devices 7SG12 DAD-N Numerical High Impedance Relay with CT Supervision Answers for energy...
  • Page 3 Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.

  • Page 4: Description Of Operation

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.

  • Page 5: Table Of Contents

    Figure 2 – DAD-N in E8 case with front panel open....................12 Figure 3 – DAD-N Rear View ..........................12 Figure 4 – High Impedance Differential Schematic ....................13 Figure 5 – DAD-N Menu Structure ......................... 14 ©2010 Siemens Protection Devices Limited Chapter 1 Page 2 of 14...

  • Page 6: Introduction

    The basic relay is supplied in a standard Epsilon case size E8. The Modular II design provides commonality between products and spare parts across a range of protection and control relays including Duobias, Ohmega, Delta, Tau and Iota. ©2010 Siemens Protection Devices Limited Chapter 1 Page 3 of 14...

  • Page 7: Analogue Inputs

    With a failed breaker condition the current 'break' may be transferred to the relay output contacts and where this level is above the break rating of the contacts an auxiliary relay with heavy-duty contacts should be utilised. ©2010 Siemens Protection Devices Limited Chapter 1 Page 4 of 14...

  • Page 8: Fascia Leds

    To use the function set ‘Trip Cct n Pickup Delay’ to the required value in the Trip Circuit Supervision Menu and then map the ‘Trip Cct Fail n’ settings in the Status Input Menu, Output Relay Menu and LED Menu as required. ©2010 Siemens Protection Devices Limited Chapter 1 Page 5 of 14...

  • Page 9: Other Features

    Note : the real-time clock, waveform records, fault records and event records are all maintained, in the event of loss of auxiliary d.c. supply voltage, by the backup storage capacitor. This capacitor has the ability ©2010 Siemens Protection Devices Limited Chapter 1 Page 6 of 14...

  • Page 10: Time Synchronisation

    As soon as the user attempts to change a setting the password is requested before any setting alterations are allowed. Once the password has been validated, the user is ‘logged on’ and any further changes can ©2010 Siemens Protection Devices Limited Chapter 1 Page 7 of 14...

  • Page 11: User Interface

    In Settings Modification mode it is used for selecting the next value of (or decreasing) the displayed setting or for deselecting a bit position in a particular control setting. ©2010 Siemens Protection Devices Limited Chapter 1 Page 8 of 14...

  • Page 12: Settings And Displays

    While viewing an editable screen pressing the ENTER key allows the user to change the displayed data. A flashing character(s) will indicate the editable field. Pressing ▲  R EAD UP or ▼  READ DOWN scrolls ©2010 Siemens Protection Devices Limited Chapter 1 Page 9 of 14...

  • Page 13: Instruments Mode

    The instrument screens of interest to the user e.g. those required to be presented to a visiting engineer for record purposes can be selected by the user ©2010 Siemens Protection Devices Limited Chapter 1 Page 10 of 14...
  • Page 14 5 seconds. The Default Screens Timer that sets the time to elapse before the relay goes into the default instruments mode is found in the SYSTEM CONFIG MENU. ©2010 Siemens Protection Devices Limited Chapter 1 Page 11 of 14...

  • Page 15: Diagrams

    7SG12 DAD N Description of Operation Diagrams Figure 2 – DAD-N in E8 case with front panel open Figure 3 – DAD-N Rear View ©2010 Siemens Protection Devices Limited Chapter 1 Page 12 of 14...

  • Page 16: Figure 4 - High Impedance Differential Schematic

    7SG12 DAD N Description of Operation PHASE A 87/50-1 & 87/50-2 & CT 50 Figure 4 – High Impedance Differential Schematic ©2010 Siemens Protection Devices Limited Chapter 1 Page 13 of 14...

  • Page 17: Figure 5 - Dad-N Menu Structure

    -> to view OUTPUT RELAY MENU -> to view LED MENU -> to view DATA STORAGE MENU -> to view COMMUNICATIONS MENU -> to view Figure 5 – DAD-N Menu Structure ©2010 Siemens Protection Devices Limited Chapter 1 Page 14 of 14...

  • Page 18: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 19 Communications ............................6 4.10 IRIG-B Time Synchronisation........................7 5. PROTECTION ELEMENTS ..........................7 Common Performance ..........................7 87/50-1, 87/50-2 Differential........................7 CT-50 CT Supervision..........................7 Trip Circuit Supervision ..........................7 ©2010 Siemens Protection Devices Limited Chapter 2 Page 2 of 7...

  • Page 20: Introduction

    High Frequency Disturbance - IEC 60255-22-1 Class III Variation 2.5kV Common (Longitudinal) Mode ≤ 5% ≤ 5% 1.0kV Series (Transverse) Mode Electrostatic Discharge - IEC 60255-22-2 Class IV Variation ©2010 Siemens Protection Devices Limited Chapter 2 Page 3 of 7...

  • Page 21: Auxiliary Energizing Quantity

    Auxiliary DC Supply – IEC 60255-11 Allowable superimposed ac component ≤ 12% of DC voltage Allowable breaks/dips in supply (collapse to zero ≤ 20ms from nominal voltage) D.C. Burden Quiescent (Typical) ©2010 Siemens Protection Devices Limited Chapter 2 Page 4 of 7...

  • Page 22: Current Inputs

    110 / 125 87.5V to 137.5V 220 / 250 175 to 280V NB: the status input operating voltage does not have to be the same as the power supply voltage. ©2010 Siemens Protection Devices Limited Chapter 2 Page 5 of 7...

  • Page 23: Indication

    All fibre optic ports can be star connected to a Sigma passive hub or simply daisy-chained in a loop-in loop-out configuration with other Reyrolle relays e.g. Argus, Delta, Ohmega, Tau. ©2010 Siemens Protection Devices Limited Chapter 2 Page 6 of 7...

  • Page 24: Irig-B Time Synchronisation

    Time Delay setting +/- 5% or +/- 10 milliseconds, whichever is the greater** **NB: - Minimum Time Delay setting is 100milliseconds 5.4 Trip Circuit Supervision ± 1% or +0, +20 ms Time Delay whichever is the greater ©2010 Siemens Protection Devices Limited Chapter 2 Page 7 of 7...

  • Page 25: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 26 7SG12 DAD N Relay Settings High Impedence Differential Protected Zone DAD-N-101 AN1C1 - C3 CT50 50-1 50-2 Model No Cat No Configuration No DAD-N-101 DA1-101 2414H80001R15 Date: 24/02/2010 12:55:00 ©2010 Siemens Protection Devices Limited Chapter 3 Page 2 of 20...
  • Page 27 IEC 60870-5-103 Semantics in control direction ..................14 4 MODBUS SEMANTICS ........................... 15 COILS ..............................15 INPUTS..............................16 REGISTERS ............................17 5 REYLOGIC DIAGRAMS ..........................17 6 LABEL INSERTS............................. 19 ©2010 Siemens Protection Devices Limited Chapter 3 Page 3 of 20...

  • Page 28: Dad-N-101 Relay Setting List

    Selects whether 1 or 5 Amp terminals are being used CT Ratio 5:0.2…5000:7 2000:1 CT ratio to scale primary current instruments 1.3 Differential Menu Description Range Default Setting 87/50-1 Element Disabled, Enabled Disabled ©2010 Siemens Protection Devices Limited Chapter 3 Page 4 of 20...

  • Page 29: Ct Supervision Menu

    Select which inputs block Trip Cct Fail 2 timer. Trigger Wave Rec NONE, 1…27 NONE Selects which inputs can trigger a waveform record Trigger Data Rec NONE, 1…27 NONE Selects which inputs can trigger a data ©2010 Siemens Protection Devices Limited Chapter 3 Page 5 of 20...

  • Page 30: Status Input Timing Menu

    0.000,0.005…864000 s Aux I/P 15 Pickup Delay 0.000,0.005…864000 s Aux I/P 15 Dropoff Delay 0.000,0.005…864000 s Aux I/P 16 Pickup Delay 0.000,0.005…864000 s Aux I/P 16 Dropoff Delay 0.000,0.005…864000 s ©2010 Siemens Protection Devices Limited Chapter 3 Page 6 of 20...

  • Page 31: Reylogic Element Menu

    NONE Trip Circuit 1 has failed Trip Cct Fail 2 NONE, 1…29 NONE Trip Circuit 2 has failed Trip Circuit Fail NONE, 1…29 NONE A trip circuit has failed. ©2010 Siemens Protection Devices Limited Chapter 3 Page 7 of 20...
  • Page 32 0.1 s Min Operate Time 11 0.02, 0.04…60 s 0.1 s Min Operate Time 12 0.02, 0.04…60 s 0.1 s Min Operate Time 13 0.02, 0.04…60 s 0.1 s ©2010 Siemens Protection Devices Limited Chapter 3 Page 8 of 20...

  • Page 33: Led Menu

    NONE Aux I/P 9 Operated NONE, 1…32 NONE Aux I/P 10 Operated NONE, 1…32 NONE Aux I/P 11 Operated NONE, 1…32 NONE Aux I/P 12 Operated NONE, 1…32 NONE ©2010 Siemens Protection Devices Limited Chapter 3 Page 9 of 20...

  • Page 34: Data Storage Menu

    2400, 4800, 9600, 19200, com port 2 (Rear lower Fibre optic port 38400, 57600, 115200 AND Front Fascia RS232 port) COM2 Parity Even, Odd, None Even Selects whether parity information is ©2010 Siemens Protection Devices Limited Chapter 3 Page 10 of 20...

  • Page 35: Instruments

    Number of stored event records Waveform Records Number of disturbance waveform records 1) Display is different when fewer status inputs are fitted 2) Display is different when fewer output relays are fitted ©2010 Siemens Protection Devices Limited Chapter 3 Page 11 of 20...

  • Page 36: Iec 60870-5-103 Communications Information

    Status Input 21 Status Input 22 Status Input 23 Status Input 24 Status Input 25 Status Input 26 Status Input 27 Plant Control Relay 1 Plant Control Relay 2 ©2010 Siemens Protection Devices Limited Chapter 3 Page 12 of 20...
  • Page 37 Setting G3 selected Setting G4 selected Trip Circuit Fail Start/Pick-up L1 Start/Pick-up L2 Start/Pick-up L3 Start/Pick-up N General Trip Trip L1 Trip L2 Trip L3 General Start/Pick-up Overall Differential Stage 1 ©2010 Siemens Protection Devices Limited Chapter 3 Page 13 of 20...

  • Page 38: Iec 60870-5-103 Semantics In Control Direction

    Energise Output Relay 18 Energise Output Relay 19 Energise Output Relay 20 Energise Output Relay 21 Energise Output Relay 22 Energise Output Relay 23 Energise Output Relay 24 Energise Output Relay 25 ©2010 Siemens Protection Devices Limited Chapter 3 Page 14 of 20...

  • Page 39: Modbus Semantics

    Energise O/P Relay 28 00029 Energise O/P Relay 29 Address Description 00101 Settings Group 1 00102 Settings Group 2 00103 Settings Group 3 00104 Settings Group 4 00105 Settings Group 5 ©2010 Siemens Protection Devices Limited Chapter 3 Page 15 of 20...

  • Page 40: Inputs

    Overall Differential Stage 2 Phase A 10124 Overall Differential Stage 2 Phase B 10125 Overall Differential Stage 2 Phase C 10126 CT Supervision Phase A 10127 CT Supervision Phase B ©2010 Siemens Protection Devices Limited Chapter 3 Page 16 of 20...

  • Page 41: Registers

    A87_50_1_Operated1 PhaseA_Trip A87_50_2_Operated1 IEC Event Code 181-70 A87_50_1_Operated2 PhaseB_Trip A87_50_2_Operated2 IEC Event Code 181-71 A87_50_1_Operated3 PhaseC_Trip A87_50_2_Operated3 IEC Event Code 181-68 PhaseA_Trip General Trip PhaseB_Trip General_Trip PhaseC_Trip IntTriggerData IntTriggerWaveform ©2010 Siemens Protection Devices Limited Chapter 3 Page 17 of 20...
  • Page 42 Select Group 3 SiSelectGroup3_Input SiSelectSettingGroup3 Select Group 4 SiSelectGroup4_Input SiSelectSettingGroup4 Select Group 5 SiSelectGroup5_Input SiSelectSettingGroup5 Select Group 6 SiSelectGroup6_Input SiSelectSettingGroup6 Select Group 7 SiSelectGroup7_Input SiSelectSettingGroup7 Select Group 8 SiSelectGroup8_Input SiSelectSettingGroup8 ©2010 Siemens Protection Devices Limited Chapter 3 Page 18 of 20...

  • Page 43: Label Inserts

    7SG12 DAD N Relay Settings 6 Label Inserts DAD-N-101-R15 DA1-101-** 24/02/2010 12:55:00 GENERAL STARTER PHASE A PHASE B PHASE C (87/50) DIFFERENTIAL (CT 50) CT SUPERVISION (74TC) TRIP CIRCUIT FAIL ©2010 Siemens Protection Devices Limited Chapter 3 Page 19 of 20...
  • Page 44 7SG12 DAD N Relay Settings DA1-101-** THIS LABEL IS E12/E16 Left DELIBERATELY BLANK 24/02/2010 12:55:00 GENERAL STARTER PHASE A PHASE B PHASE C (87/50) DIFFERENTIAL (CT/50) CT SUPERVISION (74TC) TRIP CIRCUIT FAIL ©2010 Siemens Protection Devices Limited Chapter 3 Page 20 of 20...

  • Page 45: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 46 Bit (logical 0) sent to signify the start of a byte during data transmission. Stop Bit Bit (logical 1) sent to signify the end of a byte during data transmission. ©2010 Siemens Protection Devices Limited Chapter 4 Page 2 of 10...
  • Page 47 7SG12 DAD-N Communication Interface 1 Introduction All Reyrolle relays utilise the International Communications Standard for Protection Relays, IEC 60870-5-103. This document describes how to connect the IEC60870-5-103 compliant communications interface to a control system or interrogating computer. To access the interface the user will need appropriate software within the control system or on the interrogating computer such as Reydisp Evolution.
  • Page 48 7SG12 DAD-N Communication Interface 3.3 Transmission Method The transmission method is Half Duplex serial asynchronous transmission. In IEC 60870-5-103 the line idle state is defined as Light ON. This can alternatively be selected as Light OFF in the Communications Interface menu of the relay if required for use with alternate hardware (See Section 2.5).
  • Page 49 7SG12 DAD-N Communication Interface 4.2 Setting the Remote Modem Most modems support the basic Hayes ‘AT’ command format, though different manufacturers can use different commands for the same functions. In addition, some modems use DIP switches to set parameters while others are entirely software configured. Before applying the following settings it is necessary to return the modem to its factory default settings to ensure that it is in a known state.
  • Page 50 7SG12 DAD-N Communication Interface APPENDIX A - COMMUNICATION CONNECTIONS Figures 1 to 6 illustrate a number of methods of connecting relays in communications networks. Note that in the case of the optical ring configurations (Figure 4, Figure 6 and Figure 7), the Data Echo feature must be switched ON in the communications settings menu of the relay.
  • Page 51 7SG12 DAD-N Communication Interface Parallel hardwired connections (clean contacts, binary inputs) Classical SCADA Optical link Modem Modem Personal Computer EMS Remote Control Points PSTN : Public Switched Telephone Network Modem Personal Computer - Version of the former configuration of Figure 1. It is necessary to make dial-up connection before actual information exchange.
  • Page 52 7SG12 DAD-N Communication Interface Parallel hardwired connections (clean contacts, binary inputs) PSTN : Public Switched Telephone Network Fibre-Optic Hub Multiplexer Modem Personal Computer Classical Serial optical EMS Remote SCADA links Control Points Modem SIGMA-1 Modem Personal Computer - A more sophisticated version of the former configuration of Figure 2.
  • Page 53 7SG12 DAD-N Communication Interface EMS Remote Control Points PSTN : Public Switched Telephone Network Serial optical links Modem Data Concentrator / Personal Computer Control system Modem Modem Personal Computer Cyclical polling - Both Dialogue type and Automatic comms : Man-Machine...
  • Page 54 7SG12 DAD-N Communication Interface Serial optical fibre link SIGMA 3 Local RS232 10BaseT RS232 Ethernet Laptop computer 10BaseT LANTRONIX UDS-10 or equiv. INTRANET Desktop PC Desktop PC Figure 7 – LAN Network connectivity using a SIGMA-3 + Lantronix UDS-10 or equivalent A SIGMA-3 unit may be used to as shown in Figure 7 to connect Argus and Modular II protection relays to a local area network via an Ethernet to RS232 convertor such as the Lantronix UDS-10 or similar device.

  • Page 55: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 56 Figure 15 – High Impedance Protection of Auto-transformer ................. 14 Figure 16 – High Impedance Protection of Motor, Generator or Reactors ............. 15 Figure 17 – DAD-N-101 Differential Protection Elements ..................16 ©2010 Siemens Protection Devices Limited Chapter 5 Page 2 of 16...

  • Page 57: Introduction

    As saturation is approached, the CT output current waveforms become increasingly distorted with a high percentage of 3rd and other higher odd harmonics. These variations can lead to unbalanced currents causing mal-operations. ©2010 Siemens Protection Devices Limited Chapter 5 Page 3 of 16...

  • Page 58: Stabilising Resistor

    Stabilising Resistor, Rstab. Similarly, it is this additional resistance which makes the Relay a “High Impedance” path. >> R stab Relay Figure 4 – Stabilising Resistor ©2010 Siemens Protection Devices Limited Chapter 5 Page 4 of 16...
  • Page 59 ≥ R (Ω) ≥ stab The Voltage across the Relay and Stabilising Resistor at the Relay operating current, I , is termed the setting voltage, V . So that: stab ©2010 Siemens Protection Devices Limited Chapter 5 Page 5 of 16...

  • Page 60: Non-Linear Resistor

    The voltage characteristic of the Metrosil must be; Large enough so that negligible current flows through the Metosil at the relay operating voltage. β C x I » R stab ©2010 Siemens Protection Devices Limited Chapter 5 Page 6 of 16...

  • Page 61: Fault Setting

    Check Zone relay. This monitors the current of every incomer and outgoing feeder on the Busbar, but not the internal Busbar Sections and Couplers. ©2010 Siemens Protection Devices Limited Chapter 5 Page 7 of 16...
  • Page 62 The outputs of the relays protecting each Busbar zone are then connected in series with the Check Zone relay’s outputs. Only when both operate will a trip be issued. RESERVE MAIN 1 MAIN 2 Main Main Check Figure 8 – Check Zone Relay ©2010 Siemens Protection Devices Limited Chapter 5 Page 8 of 16...

  • Page 63: Current Transformer Requirements

    For F3 and F4, the disadvantage may be acceptable in view of the low incidence of such faults. Figure 9 – CTs Overlapping the CB ©2010 Siemens Protection Devices Limited Chapter 5 Page 9 of 16...

  • Page 64: Cts On The Circuit Side Of The Circuit Breaker

    Figure 11 – CTs on Busbar side of CB 5.4 Bus Section and Bus Couplers Figure 12 – CTs on Bus Section and Bus Coupler ©2010 Siemens Protection Devices Limited Chapter 5 Page 10 of 16...

  • Page 65: Ct Supervision

    CT Supervision alarm is used to disable the protection (will the protection operate to clear the genuine fault before the CT Supervision alarm disables it ?) Typically a setting of 2 to 10 seconds is applied. ©2010 Siemens Protection Devices Limited Chapter 5 Page 11 of 16...
  • Page 66 3 Change - over + 22 normally open + 4 normally closed BI 25 BO 28 BO 29 BI 26 BI 27 I/ O 3 Figure 13 – DAD-N Connection Diagram ©2010 Siemens Protection Devices Limited Chapter 5 Page 12 of 16...
  • Page 67 7SG12 DAD N Applications Guide PROTECTED ZONE Metrosils Trip Relay(s) Series stabilising resistors Discriminating & Zone Shorting Relay CT Supervision Relay Figure 14 – Typical High Impedance Protection Components ©2010 Siemens Protection Devices Limited Chapter 5 Page 13 of 16...
  • Page 68 7SG12 DAD N Applications Guide All CTs should be the same Ratio and ideally have the same kneepoint voltage Stabilising Resistors Relay Elements Figure 15 – High Impedance Protection of Auto-transformer ©2010 Siemens Protection Devices Limited Chapter 5 Page 14 of 16...
  • Page 69 7SG12 DAD N Applications Guide RSTAB Relay Elements Figure 16 – High Impedance Protection of Motor, Generator or Reactors ©2010 Siemens Protection Devices Limited Chapter 5 Page 15 of 16...
  • Page 70 DAD-N-101 Single Zone Numerical High Impedance Differential 87 Ia AN1 C1 - C3 CT50 87/50 87/50 87 Ib -1-1 -1-2 87 Ic Figure 17 – DAD-N-101 Differential Protection Elements ©2010 Siemens Protection Devices Limited Chapter 5 Page 16 of 16...

  • Page 71: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 72 Contents 1 Unpacking, Storage & Handling ......................... 3 2 Recommended Mounting Position........................3 3 Relay Dimensions .............................. 3 4 Fixings................................3 5 Ancillary Equipment............................4 6 Precautions ................................ 4 ©2010 Siemens Protection Devices Limited Chapter 6 Page 2 of 4...
  • Page 73 4mm Ring crimp terminals suitable for the appropriate wire gauge are recommended. 4.2 Panel Fixing Screws 2-Kits – 2995G10046 each comprising: • Screw M4 X10 2106F14010 – 4 off • Lock Washes 2104F70040 – 4 off ©2010 Siemens Protection Devices Limited Chapter 6 Page 3 of 4...
  • Page 74 If the fibre optic cables are anchored using cable ties, these ties must be hand tightened – under no circumstances should cable tie tension tools or cable tie pliers be used. ©2010 Siemens Protection Devices Limited Chapter 6 Page 4 of 4...

  • Page 75: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 76 Table 2 – Lead Resistance Values .......................... 5 Table 3 – Accuracy of Measurement ........................6 Table 4 – Differential Element PU/DO ........................7 Table 5 – Primary Injection Test Results ......................... 7 ©2010 Siemens Protection Devices Limited Chapter 7 Page 2 of 8...

  • Page 77: Introduction

    4 x the rated current on any of the relay inputs. For relay models with voltage inputs the amplifiers need to be reconfigured for voltage output. 1 - 500V insulation resistance test set. 1 – Digital Multimeter ©2010 Siemens Protection Devices Limited Chapter 7 Page 3 of 8...

  • Page 78: Insulation Resistance Test

    Isolate the auxiliary supplies. Remove the trip and inter-trip links. Refer to the calculated performance data for the Overall Differential. This will give the maximum permissible lead resistance values. ©2010 Siemens Protection Devices Limited Chapter 7 Page 4 of 8...

  • Page 79: Power Supply

    Reydisp Evolutions allows off line generation of relay setting by saving the relay Settings File and then downloading it. This saves time and possibly sore fingers if the relay type is a more advance model with many protection functions. ©2010 Siemens Protection Devices Limited Chapter 7 Page 5 of 8...

  • Page 80: Setting Via Relay Fascia

    Setting Description Setting Value 87/50 Element Enable 87/50 Delay Modify the operate setting and determine the PU and DO at each setting :- Setting Description Setting Value 87/50 Setting 0.05 ©2010 Siemens Protection Devices Limited Chapter 7 Page 6 of 8...

  • Page 81: Primary Injection Tests

    Ensure all primary current displays are correct, thus verifying CT Ratio settings are correct. • Ensure all secondary current displays are correct, thus verifying CT input settings are correct. ©2010 Siemens Protection Devices Limited Chapter 7 Page 7 of 8...

  • Page 82: Putting Into Service

    Check that the LCD displays the screen below, or the ‘Relay Identifier’ set in the SYSTEM CONFIG MENU. DAD-N Replace the cover. The above reading will remain for approximately 1 hour then the display will go blank. ©2010 Siemens Protection Devices Limited Chapter 7 Page 8 of 8...

  • Page 83: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 84 : Visual inspection of the metering display (every year) Operation of output contacts (every 2 years) Secondary injection of each element (every 5 years) ©2010 Siemens Protection Devices Limited Chapter 8 Page 2 of 3...
  • Page 85 Na me, f irst nam e S treet, n umb er P ostco de, city, co untry Da te , Signature Please contact the Siemens representative office in your country to obtain return instructions. ©2010 Siemens Protection Devices Limited Chapter 8 Page 3 of 3...

  • Page 86: The Copyright And Other Intellectual Property Rights In This Document, And In Any Model Or Article Produced From It

    Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be reproduced from this document unless Siemens Protection Devices Limited consent.
  • Page 87 Figure 1 – E8 Case Style Panel Cut-out ........................3 Figure 2 – E12 Case Style Panel Cut-out ........................ 3 Figure 3 – E16 Case Style Panel Cut-out ........................ 4 Figure 4 – Rear Terminal View ..........................5 ©2010 Siemens Protection Devices Limited Chapter 9 Page 2 of 5...
  • Page 88 7SG12 DAD N Diagrams Figure 1 – E8 Case Style Panel Cut-out Figure 2 – E12 Case Style Panel Cut-out ©2010 Siemens Protection Devices Limited Chapter 9 Page 3 of 5...
  • Page 89 7SG12 DAD N Diagrams Figure 3 – E16 Case Style Panel Cut-out ©2010 Siemens Protection Devices Limited Chapter 9 Page 4 of 5...
  • Page 90 7SG12 DAD N Diagrams Figure 4 – Rear Terminal View ©2010 Siemens Protection Devices Limited Chapter 9 Page 5 of 5...
  • Page 91 Printed in Fürth Printed on elementary chlorine-free bleached paper. All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affili- ates, or their respective owners. Subject to change without prior notice. The information in this document contains general descriptions of the technical options available, which may not apply in all cases.

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