Siemens 7SR224 Description & Operation
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Siemens 7SR224 Description & Operation

Siemens 7SR224 Description & Operation

Recloser controller
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D
S
OCUMENTATION
ET
This document is part of a set. The full list of documents in the set, and the publication numbers under
which they can be ordered, is given below. These documents can be provided on request to Siemens
Protection Devices Ltd. Tel. +44 (0)191 401 5555. They can also be found on our website at
www.reyrolle-protection.com.
RECLOSER CONTROLLER 7SR224
1. Description of Operation
2. Settings, Configuration & Instruments Guide
3. Performance Specification
4. Data Communications
5. Installation Guide
6. Commissioning & Maintenance Guide
7. Applications Guide
The copyright and other intellectual property rights in this document, and in any model or article produced from it (and including
any registered or unregistered design rights) are the property of Siemens Protection Devices 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.
While the information and guidance given in this document is believed to be correct, no liability shall be accepted for any loss or
damage caused by any error or omission, whether such error or omission is the result of negligence or any other cause. Any
and all such liability is disclaimed.
©2009 Siemens Protection Devices Limited
(1) Description of
Operation
7SR224
Recloser Controller
(1) Description of Operation 7SR224

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Summary of Contents for Siemens 7SR224

  • Page 1: Documentation Set

    Siemens Protection Devices 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 2: Document Release History

    (1) Description of Operation 7SR224 OCUMENT ELEASE ISTORY This document is issue 2009/09. The list of revisions up to and including this issue is: 2008/03 First issue 2008/06 Second issue 2009/04 Third issue 2009/09 Fourth issue OFTWARE EVISION ISTORY 2008/03...

  • Page 3: Table Of Contents

    (1) Description of Operation 7SR224 ONTENTS Documentation Set..........................1 Document Release History........................2 Software Revision History........................2 Contents ..............................3 List of Figures............................5 List of Tables ............................6 Section 1: Introduction ..........................7 1.1 Current Transformer Circuits ....................7 1.2 External Resistors........................7 1.3 Fibre Optic Communication ......................7 1.4 Front Cover ..........................7...
  • Page 4 (1) Description of Operation 7SR224 3.11 Voltage Protection: Negative Phase Sequence Overvoltage (47)..........37 3.12 Voltage Protection: Neutral Overvoltage (59N) ..............38 3.13 Voltage Protection: Under/Over Frequency (81) ..............39 Section 4: Control & Logic Functions ....................40 4.1 Auto-Reclose (79) ........................40 4.1.1 Overview ........................40 Auto Reclose sequences ......................42...

  • Page 5: List Of Figures

    IGURES Figure 1.5-1 Functional Diagram of 7SR224 Relay Showing Possible External Connections .........................9 Figure 2.5-1 7SR224 with 12 Function Keys and 3 + 8 LEDs in E10 Case...........11 Figure 2.8-1 Binary Input Logic ......................14 Figure 2.9-1 Binary Output Logic ......................16 Figure 3.1-1 Logic Diagram: Directional Overcurrent Element (67)............19...

  • Page 6: List Of Tables

    (1) Description of Operation 7SR224 IST OF ABLES Table 1-1: 7SR224 Ordering Options.......................8 Table 2-1 Summary of Controller Relay Configurations ..............10 Table 6-1 Operation Mode........................64 Symbols and Nomenclature The following notational and formatting conventions are used within the remainder of this document: •...

  • Page 7: Section 1: Introduction

    This manual is applicable to the following relays: • 7SR224 Directional Overcurrent and Directional Earth Fault Recloser Control Relay The 7SR224 relay integrates the protection and control elements required to provide a complete recloser control relay. The ‘Ordering Options’ Tables summarise the features available in each model...
  • Page 8 Region World, 50/60Hz, language English, Reyrolle fascia Region World, 50/60Hz, language English, Siemens fascia Region USA, 60/50Hz, language English - US (ANSI) (language changeable), Siemens fascia Communication Interface Standard version - included in all models, USB front port, RS485 rear port...

  • Page 9: Figure 1.5-1 Functional Diagram Of 7Sr224 Relay Showing Possible External Connections

    Note: (x4) Example shows Voltage Config = Van, Vbn, Vcn (x2) (x4) (x4) Batt (x2) Test (x4) (x3) Cap. Test Figure 1.5-1 Functional Diagram of 7SR224 Relay Showing Possible External Connections ©2009 Siemens Protection Devices Limited Page 9 of 66...

  • Page 10: Section 2: Hardware Description

    (1) Description of Operation 7SR224 Section 2: Hardware Description ENERAL The structure of the relay is based upon the Multi-function hardware platform. The relays are supplied in a size E10 or E12 case (where 1 x E = width of approx. 26mm). The hardware design provides commonality between products and components across the Multi-function range of relays.

  • Page 11: Front Cover

    The operator interface is designed to provide a user-friendly method of controlling, entering settings and retrieving data from the relay. Figure 2.5-1 7SR224 with 12 Function Keys and 3 + 8 LEDs in E10 Case NOTE: Transparent cover with pushbuttons not shown ©2009 Siemens Protection Devices Limited...
  • Page 12 (1) Description of Operation 7SR224 The fascia is an integral part of the relay. Handles are located at each side of the relay which allow it to be withdrawn from the relay case. Relay Information Above the LCD three labels are provided, these provide the following information: 1) Product name and order code.

  • Page 13: Current Inputs

    (1) Description of Operation 7SR224 Each LED can be user programmed as hand or self –resetting. Hand reset LEDs can be reset by either pressing the TEST/RESET► button, energising a suitably programmed binary input, or, by sending an appropriate command over the data communications channel(s).

  • Page 14: Binary Inputs

    (1) Description of Operation 7SR224 NB: The Relay has a flat frequency response measuring harmonic currents up to and including the 50th Harmonic but does not measure the content at the aliasing frequencies i.e. 800 Hz (16 harmonic) + 1600 Hz (32 harmonic) + 2400 Hz (48 harmonic).

  • Page 15: Binary Outputs (Output Relays)

    (1) Description of Operation 7SR224 INARY UTPUTS UTPUT ELAYS Relays are fitted with 14, 22 or 30 binary outputs. All outputs are fully user configurable and can be programmed to operate from any or all of the available functions. The Power Supply module includes the relay basic I/O. The module includes six binary outputs each fitted with 1 contact –...

  • Page 16: Virtual Input/Outputs

    (1) Description of Operation 7SR224 Figure 2.9-1 Binary Output Logic 2.10 IRTUAL NPUT UTPUTS The relays have 16 virtual input/outputs, these are internal logic states. Virtual I/O is assigned in the same way as physical Binary Inputs and Binary Outputs. Virtual I/O is mapped from within the INPUT CONFIG >...

  • Page 17: Battery And Capacitor Test Facility Of The Recloser

    (1) Description of Operation 7SR224 2.12 ATTERY APACITOR ACILITY ECLOSER The quiescent battery voltage V is constantly monitored to ensure that the charging system is connected and operating correctly. The capacitor voltage is monitored externally by the Switch Unit Driver and Monitor. The healthy condition of the capacitor is indicated to the Controller by the state of two binary signals.

  • Page 18: Section 3: Protection Functions

    (1) Description of Operation 7SR224 Section 3: Protection Functions (67, 51, 50) URRENT ROTECTION HASE VERCURRENT All phase overcurrent elements have a common setting to measure either fundamental frequency RMS or True RMS current: True RMS current: 51/50 Measurement = RMS Fundamental Frequency RMS current: 51/50 Measurement = Fundamental 3.1.1 Directional Control of Overcurrent Protection (67)

  • Page 19: Figure 3.1-1 Logic Diagram: Directional Overcurrent Element (67)

    (1) Description of Operation 7SR224 Minimum Polarising Voltage The 67 Minimum Voltage setting defines the minimum polarising voltage level. Where the measured polarising voltage is below this level no directional output is given and operation of protection elements set as directional will be inhibited. This prevents mal-operation under fuse failure/MCB tripped conditions where noise voltages can be present.

  • Page 20: Instantaneous Overcurrent Protection (50)

    (1) Description of Operation 7SR224 3.1.2 Instantaneous Overcurrent Protection (50) Four elements are provided e.g. giving the option of using two elements set to forward and two to reverse. Each instantaneous element (50-n) has independent settings. 50-n Setting for pick-up current and 50- n Delay follower time delay.

  • Page 21: Time Delayed Overcurrent Protection (51)

    (1) Description of Operation 7SR224 3.1.3 Time Delayed Overcurrent Protection (51) Four elements are provided e.g. giving the option of using two elements set to forward and two to reverse. 51-n Setting sets the pick-up current level. Where the voltage controlled overcurrent function (51VCO) is used a multiplier is applied to this setting where the voltage drops below the setting VCO Setting, see section 3.2.

  • Page 22: Figure 3.1-3 Logic Diagram: Time Delayed Overcurrent Element

    (1) Description of Operation 7SR224 See Voltage Controlled Overcurrent (51V) 51-n Element 51-n Setting Enabled 51-n Charact AUTORECLOSE Disabled & 51-n Time Mult 79 P/F Inst Trips = 51-n & 51-n Delay (DTL) 79 P/F Prot’n Trip n = Delayed 51-n Min.

  • Page 23: Current Protection: Voltage Controlled Overcurrent (51V)

    (1) Description of Operation 7SR224 (51V) URRENT ROTECTION OLTAGE ONTROLLED VERCURRENT Each shaped overcurrent element 51-n Setting can be independently controlled by the level of measured (control) input voltage. For applied voltages above VCO Setting the 51-n element operates in accordance with its normal current setting (see 3.1.3).

  • Page 24: Current Protection: Measured Earth Fault (67G, 51G, 50G)

    (1) Description of Operation 7SR224 (67G, 51G, 50G) URRENT ROTECTION EASURED ARTH AULT The earth current is measured directly via a dedicated current analogue input. All measured earth fault elements have a common setting to measure either fundamental frequency RMS, True RMS current or the derived sum current:...

  • Page 25: Instantaneous Measured Earth Fault Protection (50G)

    (1) Description of Operation 7SR224 Figure 3.3-1 Logic Diagram: Measured Directional Earth Fault Protection 3.3.2 Instantaneous Measured Earth Fault Protection (50G) Four elements are provided e.g. giving the option of using two elements set to forward and two to reverse.

  • Page 26: Time Delayed Measured Earth Fault Protection (51G)

    (1) Description of Operation 7SR224 3.3.3 Time Delayed Measured Earth Fault Protection (51G) Four elements are provided e.g. giving the option of using two elements set to forward and two to reverse. 51G-n Setting sets the pick-up current level. A number of shaped characteristics are provided. An inverse definite minimum time (IDMT) characteristic is selected from IEC and ANSI curves using 51G-n Char.

  • Page 27: Current Protection: Sensitive Earth Fault (67Sef, 51Sef, 50Sef)

    (1) Description of Operation 7SR224 (67SEF, 51SEF, 50SEF) URRENT ROTECTION ENSITIVE ARTH AULT Current for the Sensitive Earth Fault (SEF) elements is measured directly via a dedicated current analogue input. SEF elements measure the fundamental frequency RMS current. 3.4.1 Directional Control of Sensitive Earth Fault Protection (67SEF) The directional element produces forward and reverse outputs for use with SEF elements.

  • Page 28: Instantaneous Sensitive Earth Fault Protection (50Sef)

    (1) Description of Operation 7SR224 3.4.2 Instantaneous Sensitive Earth Fault Protection (50SEF) Four elements are provided e.g. giving the option of using two elements set to forward and two to reverse. Each instantaneous element has independent settings for pick-up current 50SEF-n Setting and a follower time delay 50SEF-n Delay.

  • Page 29: Time Delayed Sensitive Earth Fault Protection (51Sef)

    (1) Description of Operation 7SR224 3.4.3 Time Delayed Sensitive Earth Fault Protection (51SEF) Four elements are provided e.g. giving the option of using two elements set to forward and two to reverse. 51SEF-n Setting sets the pick-up current level. A number of shaped characteristics are provided. An inverse definite minimum time (IDMT) characteristic is selected from IEC and ANSI curves using 51SEF-n Char.

  • Page 30: Current Protection: High Impedance Restricted Earth Fault (64H)

    (1) Description of Operation 7SR224 (64H) URRENT ROTECTION MPEDANCE ESTRICTED ARTH AULT One high impedance Restricted Earth Fault (REF) element is provided. The relay utilises fundamental current measurement values for this function. The single phase current input is derived from the residual output of line/neutral CTs connected in parallel.

  • Page 31: Current Protection: Cold Load (51C)

    (1) Description of Operation 7SR224 URRENT ROTECTION The setting of each shaped overcurrent element (51-n) can be inhibited and alternative ‘cold load’ settings (51c-n) can be applied for a period following circuit switch in. The Cold Load settings are applied after the circuit breaker has been open for longer than the Pick-Up Time setting.

  • Page 32: Current Protection: Negative Phase Sequence Overcurrent (46Nps)

    (1) Description of Operation 7SR224 (46NPS) URRENT ROTECTION EGATIVE HASE EQUENCE VERCURRENT The negative sequence phase (NPS) component of current (I2) is derived from the three phase currents. It is a measure of the quantity of unbalanced current in the system.

  • Page 33: Current Protection: Under-Current (37)

    (1) Description of Operation 7SR224 (37) URRENT ROTECTION NDER URRENT Two under-current elements are provided. Each phase has an independent level detector and current-timing element. 37-n Setting sets the pick- up current. An output is given after elapse of the 37-n Delay setting.

  • Page 34: Current Protection: Thermal Overload (49)

    (1) Description of Operation 7SR224 (49) URRENT ROTECTION HERMAL VERLOAD The relay provides a thermal overload suitable for the protection of static plant. Phase segregated elements are provided. The temperature of the protected equipment is not measured directly. Instead, thermal overload conditions are calculated using the measure True RMS current.

  • Page 35: Figure 3.9-1 Logic Diagram: Thermal Overload Protection (49S)

    (1) Description of Operation 7SR224 which 100% of thermal capacity will be reached after a period of time and it is therefore normally set slightly above the full load current of the protected device. The thermal state may be reset from the fascia or externally via a binary input.

  • Page 36: Voltage Protection: Phase Under/Over Voltage (27/59)

    (1) Description of Operation 7SR224 3.10 (27/59) OLTAGE ROTECTION HASE NDER OLTAGE In total five under/over voltage elements are provided. Four elements are provided for the ‘Phase’ Voltages and one for the ‘Auxiliary’ input voltage. The relay utilises fundamental frequency RMS voltage for this function. All under/over voltage elements have a common setting to measure phase to phase (Ph-Ph) or phase to neutral (Ph-N) voltage using the Voltage Input Mode setting.

  • Page 37: Voltage Protection: Negative Phase Sequence Overvoltage (47)

    (1) Description of Operation 7SR224 3.11 (47) OLTAGE ROTECTION EGATIVE HASE EQUENCE VERVOLTAGE Negative phase sequence (NPS) voltage (V2) is a measure of the quantity of unbalanced voltage in the system. The relay derives the NPS voltage from the three input voltages (VL1, VL2 and VL3).

  • Page 38: Voltage Protection: Neutral Overvoltage (59N)

    (1) Description of Operation 7SR224 3.12 (59N) OLTAGE ROTECTION EUTRAL VERVOLTAGE Two Neutral Overvoltage (or Neutral Voltage Displacement) elements are provided. 59N Voltage Source setting selects the source of the residual voltage to be measured. The voltage is measured directly from the Vx input or derived from the line voltages where suitable VT connections are present.

  • Page 39: Voltage Protection: Under/Over Frequency (81)

    (1) Description of Operation 7SR224 3.13 (81) OLTAGE ROTECTION NDER REQUENCY Four under/over frequency elements are provided. The relay utilises fundamental voltage measurement values for this function. The frequency calculation is based on the highest input voltage derived from the voltage selection algorithm.

  • Page 40: Section 4: Control & Logic Functions

    (1) Description of Operation 7SR224 Section 4: Control & Logic Functions (79) ECLOSE 4.1.1 Overview A high proportion of faults on an Overhead Line (OHL) network are transient. These faults can be cleared and the network restored quickly by using Instantaneous (Fast) Protection trips followed by an automated sequence of CB reclosures after the line has been dead for a short time, this ‘deadtime’...
  • Page 41 (1) Description of Operation 7SR224 When an auto-reclose sequence does not result in a successful reclosure the relay goes to the lockout state. Indications The Instruments Menu includes the following meters relevant to the status of the Auto-Reclose and Manual Closing of the circuit breaker: - Status of the AR sequence AR Shot Count.

  • Page 42: Auto Reclose Sequences

    (1) Description of Operation 7SR224 Auto Reclose sequences The CONTROL & LOGIC>AUTO RECLOSE PROT’N and CONTROL & LOGIC>AUTORECLOSE CONFIG’ menus, allow the user to set independent Protection and Auto Reclose sequences for each type of fault i.e. Phase Fault (P/F), Earth Fault (E/F), Sensitive Earth Fault (SEF) or External Protections (EXTERN).

  • Page 43: 4.1.2 Autoreclose Prot'n Menu

    (1) Description of Operation 7SR224 4.1.2 AUTORECLOSE PROT’N Menu This menu presents the Overcurrent Protection elements available for each type of Fault i.e. P/F, E/F or SEF and allows the user to select those that are to be applied as Inst trips; those that are to be applied as Delayed Trips;...
  • Page 44 (1) Description of Operation 7SR224 Notes on the ‘Lockout’ State The Lockout state can be reached for a number of reasons. Lockout will occur for the following: - • At the end of the 79 Sequence Fail Timer. • At the end of the Reclaim timer if the CB is in the open position.

  • Page 45: 4.1.4 P/F Shots Sub-Menu

    (1) Description of Operation 7SR224 4.1.4 P/F SHOTS sub-menu This menu allows the Phase fault trip/reclose sequence to be parameterized:- The first protection Trip in the P/F sequence can be set to either Inst or 79 P/F Prot’n Trip1 Delayed.

  • Page 46: Extern Shots Sub-Menu

    (1) Description of Operation 7SR224 4.1.7 EXTERN SHOTS sub-menu This menu allows the External Protection auto-reclose sequence to be parameterized:- Not Blocked/Blocked - Blocked raises an output which can be mapped to a 79 P/F Prot’n Trip1 Binary output to Block an External Protection’s Trip Output.

  • Page 47: Figure 4.1-2 Basic Auto-Reclose Sequence Diagram

    (1) Description of Operation 7SR224 Figure 4.1-2 Basic Auto-Reclose Sequence Diagram ©2009 Siemens Protection Devices Limited Page 47 of 66...

  • Page 48: Manual Close

    (1) Description of Operation 7SR224 ANUAL LOSE A Manual Close Command can be initiated in one of three ways: via a Close CB binary input, via the data communication Channel(s) or from the relay CONTROL MODE menu. It causes an instantaneous operation via 79MC Close CB binary output, over-riding any auto-reclose (AR) sequence in progress.

  • Page 49: Figure 4.3-1 Logic Diagram: Circuit Breaker Status

    (1) Description of Operation 7SR224 Blocked Close Delay The close command may be delayed by a Block Close CB signal applied to a binary input. This causes the feature to pause before it issues the CB close command and can be used, for example, to delay CB closure until the CB energy has reached an acceptable level.

  • Page 50: Quick Logic

    (1) Description of Operation 7SR224 UICK OGIC The ‘Quick Logic’ feature allows the user to input up to 16 logic equations (E1 to E16) in text format. Equations can be entered using Reydisp or at the relay fascia. Each logic equation is built up from text representing control characters. Each can be up to 20 characters long.

  • Page 51: Figure 4.4-1 Sequence Diagram: Quick Logic Pu/Do Timers (Counter Reset Mode Off)

    (1) Description of Operation 7SR224 Figure 4.4-1 Sequence Diagram: Quick Logic PU/DO Timers (Counter Reset Mode Off) When the count value = En Counter Target the output of the counter (En) = 1 and this value is held until the initiating conditions are removed when En is instantaneously reset.

  • Page 52: Section 5: Supervision Functions

    (1) Description of Operation 7SR224 Section 5: Supervision Functions (50BF) IRCUIT REAKER AILURE The circuit breaker fail function has two time delayed outputs that can be used for combinations of re- tripping or back-tripping. CB Fail outputs are given after elapse of the 50BF-1 Delay or 50BF-2 Delay settings.

  • Page 53: Vt Supervision (60Vts)

    (1) Description of Operation 7SR224 VT S (60VTS) UPERVISION 1 or 2 Phase Failure Detection Normally the presence of negative phase sequence (NPS) or zero phase sequence (ZPS) voltage in a power system is accompanied by NPS or ZPS current. The presence of either of these sequence voltages without the equivalent level of the appropriate sequence current is used to indicate a failure of one or two VT phases.

  • Page 54: Figure 5.2-1 Logic Diagram: Vt Supervision Function (60Vts)

    (1) Description of Operation 7SR224 Enabled Disabled & 60VTS Inhibit 1 or 2 Phase Fail Phase Seq. Filter & 60VTS Delay Phase Seq. & Filter > 1 3 Phase Fail 60VTS Operated & & >1 External Trigger 60VTS Ext_Trig External Reset 60VTS Ext_Reset Figure 5.2-1...

  • Page 55: Ct Supervision (60Cts)

    (1) Description of Operation 7SR224 CT S (60CTS) UPERVISION Normally the presence of negative phase sequence (NPS) current in a power system is accompanied by NPS voltage. The presence of NPS current without NPS voltage is used to indicate a current transformer failure.

  • Page 56: Broken Conductor (46Bc)

    (1) Description of Operation 7SR224 (46BC) ROKEN ONDUCTOR The element calculates the ratio of NPS to PPS currents. Where the NPS:PPS current ratio is above 46BC Setting an output is given after the 46BC Delay. The Broken Conductor function can be inhibited from A binary or virtual input.

  • Page 57: Inrush Detector (81Hbl2)

    (1) Description of Operation 7SR224 (81HBL2) NRUSH ETECTOR Inrush restraint detector elements are provided, these monitor the line currents. The inrush restraint detector can be used to block the operation of selected elements during transformer magnetising inrush conditions. The 81HBL2 Bias setting allows the user to select between Phase, Sum and Cross methods of measurement: Phase Each phase is inhibited separately.

  • Page 58: Battery Test

    (1) Description of Operation 7SR224 ATTERY The DC battery voltage is constantly monitored by the relay. The output function Battery Healthy is provided to indicate that the battery charging system is connected and functioning correctly by measurement of the ‘Float Charge’ voltage level and comparison with the minimum float voltage based on the Battery Nominal Voltage setting.

  • Page 59: Capacitor Test

    (1) Description of Operation 7SR224 APACITOR The actuator mechanism of the recloser can be driven from a charged capacitor network. The condition of the capacitors is monitored externally to the relay and the interface to the relay is in the form of two binary signals which are driven by undervoltage detectors as shown below.

  • Page 60: Power Quality (27S/59S)

    (1) Description of Operation 7SR224 (27S/59S) OWER UALITY Voltage sag (27S) and voltage swell (59S) elements monitor the power supply quality. The elements monitor the deviation of the voltage from the nominal value and the duration of this under or over voltage in accordance with IEEE 1159.

  • Page 61: Section 6: Other Features

    (1) Description of Operation 7SR224 Section 6: Other Features OMMUNICATIONS Two communication ports, COM1 and COM2 are provided. RS485 connections are available on the terminal blocks at the rear of the relay (COM1). A USB port, (COM 2), is provided at the front of the relay for local access using a PC.

  • Page 62: Output Matrix Test

    (1) Description of Operation 7SR224 UTPUT ATRIX The feature is only visible from the Relay fascia and allows the user to operate the relays functions. The test of the function will automatically operate any Binary Inputs or LED’s already assigned to that function.

  • Page 63: Fault Records

    (1) Description of Operation 7SR224 6.4.4 Fault Records Up to ten fault records can be stored and displayed on the Fascia LCD. Fault records provide a summary of the relay status at the time of trip, i.e. the element that issued the trip, any elements that were picked up, the fault type, LED indications, date and time.

  • Page 64: Operating Mode

    (1) Description of Operation 7SR224 PERATING The relay has three operating modes, Local, Remote and Out of Service. The following table identifies the functions operation in each mode. The modes can be selected by the following methods: SYSTEM CONFIG>RELAY MODE setting, a Binary Input or Command...

  • Page 65: Real Time Clock

    (1) Description of Operation 7SR224 79 Trip & Lockout Hotline Work In/Out E/F In/Out SEF In/Out Instantaneous Protection In/Out Battery Test Required LOCK Time and date can be set either via the relay fascia using appropriate commands in the System Config menu, via the data comms channel(s) or via the optional IRIG-B input.

  • Page 66: Password Feature

    Control Menu from the front fascia. The password validation screen also displays a numerical code. If the password is lost or forgotten, this code should be communicated to Siemens Protection Devices Ltd. and the password can be retrieved. Page 66 of 66...

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