7SD600x Catalogue[1]

SIPROTEC 7SD60Numerical Current DifferentialProtection Relay for Two Pilot-Wire Link

ProtectionSystems

CatalogSIPROTEC5.2 ⋅1999

SIPROTEC 7SD60 Numerical Current Differential Protection Relayfor Two Pilot-Wire Link

Differential protection

Siemens SIPROTEC 5.2 ⋅ 1999 1

Siemens AG 1999

Description 2 to 4

Functions 5 and 6

Connection examples 7

Technical data 8 to 11

Selection and

ordering data 12

Circuit diagram 13

Dimension drawings 14 and 15

Terminals 15

Conditions of sale

and delivery 16

Page

Differential protection relay foroverhead lines and cables

Current differential protectionwith external summation cur-rent transformer 4AM49 (87L)

Suitable for use for distancesof 12 km max. via two pilot-wires

Differential protection can becombined with overcurrentrelease

Pilot-wire monitoring function Bidirectional remote tripping Circuit-breaker intertripping at

the remote station Seal-in of the TRIP command

until manual reset (Lockoutfunction)

Minimal current transformerrequirements due to integrat-ed saturation detector

Restraint against inrush /unde-layed trip forhighdifferentialfault currents

Operational measured values

Local and remote current Differential current Restraint current

Monitoring functions

Hardware Firmware Spill currentsupervision

Hardware

Auxiliary supply voltages24, 48 V DC60, 110, 125 V DC220, 250 V DC, 115 V AC

Local operation by means ofintegrated keyboard

LCD display for settings andanalysis

Housingflush-mountedhousing1/619"7XP20surface-mountedhousing1/619"7XP20

Fig. 1SIPROTEC 7SD60Numerical currentdifferential protection relay

Communication

via personal computer andDIGSI 3via RS232↔RS485 converter

with modem with substation control system

via IEC 60870-5-103 2kV isolatedRS485 interface,

busconnectionpossible

Protection functions

ANSI IEC

∆I for lines/cables,transformers

Intertrip, remotetrip

Lockout function

87L87T

85

86

LSP2

116f

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Application

The 7SD60 unit is a numericalcurrent differential protectionrelay, simple to set, operatingin conjunction with the remotestation via a two pilot-wire link.It is connected to the primarycurrent transformers via an ex-ternal summation currenttransformer. The unit operatesinternally on the summatedcurrent taken from the second-ary side of the summation cur-rent transformer. The link tothe remote station is realizedby means of a pair of symmet-rical pilot-wires allowing dis-tances of up to approximately12 km. Adaptation to the pi-lot-wire resistance is effectedby means of software withinthe unit. Therefore matching isnot necessary.The primary field of applicationof the unit is protection ofshort overhead lines and ca-bles with two line ends. How-ever, transformers and reac-tors may be located within theprotection zone. The unit canbe fitted with inrush restraintin such cases. A differentialprotection instantaneous trip-ping stage is also provided inthis case. Vector group adapta-tion is not effected inside theunit and must, if necessary, beeffected by means of a match-ing current transformer.The 7SD60 can be fitted with apilot-wire monitoring function.In addition to monitoring thepilot-wire link to the remotestation, this also includesbidirectional circuit-breakerintertripping and a remote trip-ping command.This unit substitutes the7SD24 steady-state differentialprotection. However, directinteroperation with the 7SD24is not possible. On replace-ment of a 7SD24, its externalsummation current trans-former can be used as the in-put transformer for the 7SD60.

Construction

The compact 7SD60 protec-tion relay contains all the com-ponents for:• Measured value acquisition

and evaluation• Operation and LCD indica-

tions• Alarm and command con-

tacts• Input and evaluation of binary

signals• Data transmission via the

RS485 bus interface• Auxiliary voltage supplyThe primary current transform-ers are connected to the4AM49 summation trans-former. At the rated currentvalue of either 1 A or 5 A thisoutputs a current of 20 mAwhich is measured by the7SD60 unit. The summationcurrent transformer is suppliedtogether with the protectionunit if so ordered.The unit can be supplied intwo different housings. Theone for flush mounting in apanel or cubicle has connec-tion terminals at the rear.The version for panel surfacemounting is supplied with ter-minals accessible from thefront. Alternatively the unit canbe supplied with two-tier ter-minals arranged above and be-low the unit.

Functions

The following functions are in-tegrated:• Current differential protec-

tion with adjustable tripvalue IDiff>

• Differential protection withcombined trip release(IDiff> and I)

• Detection of current trans-former saturation due to ex-ternal faults.In consequence: Increasedrestraint of differential pro-tection.

• Inrush restraint with instanta-neous tripping stage

• Seal-in of the trip commanduntil manual reset (Lockoutfunction)

• Pilot-wire monitoring• Circuit-breaker intertripping

to the remote station• Remote tripping command

via a binary input

Improved measuringmethods

By means of digital measuredvalue processing, in particularthrough use of numerical fun-damental frequency filters, theinterference effects of DCcomponents in the instrumenttransformer circuits and othertransient components in thedifferential current is practicallyfiltered out. By that, use ofsensitive settings of the pro-tection unit is possible, evenunder difficult conditions.

Digital 100 Hz filters, which op-erate precisely and have nonegative effect on thelong-term stability, are em-ployed for detection of the in-rush condition.

Continuous self-monitoring

Both the hardware and soft-ware of the unit are continu-ously self-monitored. Highavailability is thus ensured.

Event-logging withtime-stamp

The 7SD60 unit makes avail-able extensive data for analy-sis of faults and for supervisionof the operating conditions.The messages are time-stamped and stored in variousmemories.• Fault indications (fault logs)

The last three fault logs arealways available on request.All the events associatedwith differential protectiontripping are recorded on amillisecond time resolution.Whenever a new fault opera-tion occurs, the oldest onestored is overwritten.

• Operational indications(event logs)All operational indications arestored in a circular buffer.

SIPROTEC 7SD60 Numerical Current Differential Protection Relayfor Two Pilot-Wire LinkDescription

2 Siemens SIPROTEC 5.2 ⋅ 1999

LSP2

115f

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LSP2

002f

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Fig. 2Front viewsurface-mountingcase, terminals onthe side

Fig. 3Rear view

flush-mountingcase

Operational measured values

Two measured values can bedisplayed simultaneously onthe LCD display. The followingmeasured values are availablefor supervision and commis-sioning purposes:• The summated current at the

local relay (which is a replicaof the symmetrical operatingcurrent of the line)

• The calculated summatedcurrent of the remote end

• The differential current of theline. This is the difference ofthe summated current of thelocal relay and the summatedcurrent of the remote end.

• Pilot-wire resistance (forcommissioning and setting)

• The angle between thesummated currents (for com-missioning)

• Restraint current

Testing aids

The protection unit facilitatestesting and commissioning forthe user. Numerous test func-tions, which can be activatedeither by means of the opera-tor keys or by means of theDIGSI PC program, have beenintegrated in the unit. Entry ofa password is required forsome of the tests. The follow-ing testing aids are provided:• Measured value display of

the operational values• Interrogation of the status of

binary inputs, LEDs• Circuit-breaker trip test

Operation of the trip relay bymeans of operator keys.Previous entry of passwordnecessary.

Freely assignable inputs andoutputs

A number of messages, e.g.blocking of a function via a bi-nary input or the TRIP com-mand (which is assigned to acommand contact) are avail-able within the unit. Com-monly used messages are pre-assigned, so that normallythere is no need to alter the in-puts and outputs.Nonetheless, provision hasbeen made for “OR linking” bythe user of up to 10 messagesto a binary input. Up to 20messages can be simulta-neously assigned to a com-mand and alarm relay or to aLED.

Serial data transmission

As standard, the unit is fittedwith an RS485 interface. Thisis suitable for connection to abus and allows connection ofup to 32 devices via a two-wireserial interface (use of a thirdcore for earth is recom-mended). A PC is connectedvia this interface using anRS232<->RS485 converter,thus allowing use of the DIGSIoperator program, by means ofwhich PC-aided planning, pa-rameter setting and evaluationcan be performed. By thisreadout it is also possible tooutput the fault recordingsstored by the unit on occur-rence of faults.Using a RS485<->820 nm opti-cal converter as an accessory(7XV5650, 7XV5651), it is pos-sible to provide an interfer-ence-free and isolated link to acentral control system or a re-mote control system employ-ing DIGSI, thus allowing imple-mentation of economically via-ble configurations, e.g. for re-mote diagnostics.

The serial interface can also beset in the IEC 60870-5-103mode (VDEW - Association ofGerman Utilities - interface),thus allowing integration of theunit in a station control system.However, only 2 messages(ready for operation and thetrip signal) and the fault record-ing are available. For this rea-son use of the 7SD502 unit isrecommended in those casesin which integration in the sta-tion control system is a primeconsideration.


Fig. 4Bus communication via RS485 interface

Opt↔RS485RS232↔RS485Converter

Protectiondevice 17SD60



Terminator120 Ω(line de-pending)or

Easy setting

Menu-driven setting is carriedout via the integrated operatorpanel and the LCD display.Setting by means of the DIGSIprogram is, however, muchmore user-friendly. In the lattercase all the PC functions of theDIGSI standard program, whichis common to all SIPROTECunits, are available. An eco-nomic version DIGSI-Light isavailable for the 7SD60, 7SJ60and 7RW60 units.

Fault recording

Fault recording is carried outon tripping by the differentialrelay. The instantaneous valueof the summated current ofthe local relay and of the re-mote relay are recorded in ad-dition to the differential currentand the restraint current.Triggering of fault recordingfrom the PC is also possiblefor test purposes.Up to eight faults in total canbe saved at any one time. Theoldest of these is overwrittenwhenever a new fault is re-corded.Total fault memory time is 5 s.



Description

Fig. 6Central operation via DIGSI

Fig. 5PC-based setting

Localoperation

Remoteoperation

RS232 FO

Mini star coupler

FO FO FO FO

FOConverter

RS485

FOConverter

RS485

7SD60 7SJ62 7SD60 7SJ62

7SJ62 7SA511

7XV5651 7XV5650

Mode of operation of the dif-ferential protection relay

An external summation cur-rent transformer 4AM49,which can be supplied as anaccessory either in a 1 A or a5 A version, allows connectionof any secondary currents ofthe primary current transform-ers (see Fig. 7). The standardratios of the three primarywindings of the summationcurrent transformer areIL1:IL2:IL3 = 5:3:4(IL1:IL3:IL0=2:1:3) (see Fig. 9).In consequence the sensitivityof the tripping characteristicfor single-phase faults is ap-preciably higher in comparisonto that for two-phase andthree-phase faults. Since thecurrent on such faults is oftenweak, an amplification factorof 1.7 to 2.8 referred to thesymmetrical response value isachieved.Other sensitivity values can,however, be obtained by alter-ing the connections at thesummation c.t.With a symmetrical three-phasecurrent of 1 x IN, the secondarycurrent of the summation cur-rent transformer is 20 mA.The 7SD60 measures anddigitalizes the summatedcurrent IM1 of the local relay bymeans of a sensitive currentinput (see Fig. 9). A voltagedrop occurs across a fixed-value resistor Rb installed inthe unit. With a through-flowing load or a through-flowing short-circuit current,the voltage drop at both endsof the line is approximatelyequal but of opposite polarity,so that no current flowsthrough the pilot-wire. On oc-currence of an internal fault,different values are obtainedfor the voltage drop across Rb

at both ends. In consequencea current Ia flows through thepilot-wire, which is measuredby means of the current trans-former. In conjunction with thepilot-wire resistance (availableas a parameter in the unit) andthe internal resistor Ra, it ispossible to calculate the differ-ential current from the meas-ured current flowing throughthe pilot-wire. As soon as anadjustable value is reached,the protection relay trips theline at both ends.Matching of the sensitivity ofthe unit for different values ofpilot-wire resistance is ef-fected by the firmware of theunit during parameter setting,

so that time-consumingmatching of the pilot-wire re-sistance is unnecessary.

Trip characteristic of thedifferential protection relay

The main function of the unit iscurrent comparison protection.The trip characteristic is fixedand takes into account boththe linear and the non-linear er-

rors of the current transform-ers. It is only necessary to setthe tripping value IDiff> (see Fig.8), although the standard set-ting is suitable for most appli-cations. It should beparameterized according to therated current of the line; sensi-tive setting is possible evenwhen the current transformerrated currents and the line

rated currents differ by asmuch as a factor of 2. Differ-ences in the current transfor-mation ratios at the ends ofthe line must, however, becompensated for by means ofexternal matching currenttransformers.In some cases this can be real-ized by the summation currenttransformer.


Fig. 8Trip characteristic of differential protection

Fig. 77SD60 Line differential protection for operation with two pilot wires

Functions

4AM4930 summationcurrent transformer

7SD60station 1

7SD60station 2

Pair of pilot wires,max. 12 km

IDiffIN Line

IRestraintIN Line

Trip

Additionalrestraint area

Setting IDiff>

Slope 2/3

Slope 1/3

2.5 fixed invariable

IDiff = |I1 + I2|

IRestraint = |I1| + |I2|

I1 = current at local relay end of line, current flowing into the line is positive

I2 = current at remote relay, current flowing into the line is positive

IN Line = rated current of the line


Overcurrent release / differ-ential current monitoring

The differential protectionfunction can be combined withan additional overcurrent re-lease. To this end the criteria„overcurrent“ and „differentialcurrent“ are linked logically sothat a TRIP command is givenout by the differential functiononly when a differentialcurrent and an overcurrent co-exist. By this means it is oftenpossible to avoid malfunction-ing due to pilot-wireshort-circuit or wire-break of aconnection between a currenttransformer and the summa-tion current transformer. Forthis purpose the 7SD60 is fit-ted with an additional differen-tial current monitoring func-tion, which can effectivelyblock the differential protec-tion after a delay of some sec-onds on reaching of an adjust-able value of differential cur-rent in conjunction with simul-taneous operational current IM1

within the load range.

Saturation detector

Improved stability on sin-gle-ended saturation of the pri-mary current transformers isensured by means of an inte-grated saturation detector. Itprovides additional stabilityduring external faults. 5 ms areenough time to measure anexternal fault due to a high re-straint and small differentialcurrent. Indication is donewithin the additional restraintarea (see Fig. 8). If - due to c.t.saturation - the differential cur-rent flows into the trip area,the differential trip is blockedfor a certain time. Transientsaturation of current trans-formers caused by transposedDC components in theshort-circuit current can thusbe recognized. As a result therequirements on the currenttransformers are reduced sothat they are only required toconduct the steady-statethrough-flowing short-circuitcurrent without saturation.

Pilot-wire link / pilot-wiremonitoring

The link to the remote stationcomprises a symmetrical pairof wires (e.g. telephone lines).The maximum permissible dis-tance between two stations isapproximately 12 km.4AM9513 isolation units canbe employed for potential iso-lation against interference in-duced by longitudinal voltageswhere the pilot-wires run par-allel to power cables over longdistances.Since the pilot-wires form anintegral part of the differentialprotection, these are normallymonitored continuously. Thisfunction is available as an op-tion. To achieve this, 2 kHzpulses with a defined pulse-width ratio are transmitted tothe remote relay via the pi-lot-wires. Detection of a faultin the pilot-wire link results inblocking of the differential pro-tection.

Circuit-breaker intertripping /remote tripping

Normally tripping is effected atboth stations as a result of cur-rent comparison. Tripping atone end only can occur whenan overcurrent release is usedor with short-circuit currentsonly slightly above the trippingvalue. Circuit-breaker intertrip-ping can be parameterized inthe unit with integral pilot-wiremonitor, so that definite trip-ping at both ends of the line isassured.In addition, it is possible bymeans of a binary input to out-put a remote tripping com-mand for both directions. Thecommand transmission time isapproximately 80 ms.

Lockout of the TRIP com-mand with manual reset

The TRIP command can belocked-out after tripping. Inparticular, in the case of trans-formers within the protectionzone, reclosure of the line isnormally effected only afterthe cause of the fault has beenascertained by the user. Man-ual reset is possible either viathe operator panel (with pass-word) or via a binary input. Asa result premature reclosure ofthe circuit-breaker is pre-vented. The logic state of theTRIP command remainsstored even during failure ofthe auxiliary supply voltage sothat it is still present on resto-ration of the auxiliary supplyvoltage.

Inrush restraint / instanta-neous tripping stage

Where transformers or reac-tors are located within the pro-tection zone, inrush restraintcan be supplied as an option.This inrush restraint evaluatesthe second harmonic of thedifferential current, which istypical for inrush phenomena.If the second harmonic valueof the differential current re-ferred to the fundamental fre-quency exceeds a presetvalue, tripping by the differen-tial protection is blocked. Inthe case of high-current inter-nal faults, whose amplitudeexceeds the inrush currentpeak, tripping can be carriedout instantaneously.Vector group adaptation is noteffected inside the unit andmust, where necessary, bebrought about by means of anexternal matching transformerscheme.

SIPROTEC 7SD60 Numerical Current Differential Protection Relayfor Two Pilot-Wire LinkFunctions


Connection examples


Fig. 11Typical circuit for auxiliaryvoltage supply

Fig. 9Standard connection L1-L3-E,suitable for all type of networks

Fig. 10Protection configuration withmain (7SD60) and backupovercurrent (7SJ60) protection

CAUTION!The pilot wires may neitherbe earthed nor fitted withvoltage arresters.

PWM

AlarmAlarmCBLEDReset

LockoutReset

Blockdiff. prot.

BI2

Pair ofpilotwires

Pilot-wiresmonitoring

Lockout

Remotetrip

Summationcurrenttransformer

PWM Pilot-wires monitoring

Jumpers: D-G; B-E

Pilotwires

Remotetrip

Lockout

Pilot-wiresmonitoring

BI1 BI3


Summationcurrenttransformer

SIPROTEC 7SD60 Numerical Current Differential Protection Relayfor Two Pilot-Wire LinkTechnical data

Rated current IN 20 mA without summation current transformer1 or 5 A with summation current transformer

Rated frequency fN 50/60 Hz parameterizableThermal overload capability current path

continuous 2 x INfor 10s 30 x INfor 1s 100 x IN

Auxiliary voltage via integrated DC/DC converterRated auxiliary DC voltage/permissible variations 24/48 V DC /19 to 58 V DC

60/110/125 V DC /48 to 150 V DC220/250 V DC /176 to 300 V DC

Superimposed AC voltage Vaux ≤ 12 % at rated voltagePeak-to-peak ≤ 6 % at limits of admissible voltagePower consumption

Quiescent Approx. 2 WEnergized Approx. 4 W

Bridging time during failure/ ≥ 50 ms (at Vaux ≥ 100 V AC/DC)short-circuit of auxiliary voltage ≥ 20 ms (at Vaux ≥ 24 V DC)Rated auxiliary voltage AC Vaux /permissible variations 115 V AC / 88 to 133 V ACNumber of relays 2 (marshallable)Contacts per relay 2 NO or 1 NOSwitching capacity

Make 1000 W/VABreak 30 W/VA

Switching voltage 250 VPermissible current

Continuous 5 AFor 0.5 s 30 A

Number of relays 3 (2 marshallable)Contacts per relay 1 COSwitching capacity

Make 1000 W/VABreak 30 W/VA

Switching voltage 250 V AC/DCPermissible current 5 ANumber 3 (marshallable)Operation voltage 24 to 250 V DCCurrent consumption, energized, Approx. 2.5 mA

independent of operating voltagePick-up threshold, reconnectable by solder bridges

Rated aux. voltages 24/48/60 V DCVpick-up ≥ 17 V DCVdrop-off < 8 V DCRated aux. voltages 110/125/220/250 V DCVpick-up ≥ 74 V DCVdrop-off < 45 V DC

Standard RS485Test voltage 2.8 kV DC for 1 minConnections Via wire to housing terminals,

2 data transmission lines,1 earthing cable for connection to anRS485↔RS232 converter, cables haveto be shielded, screen has to be earthedSetting at supply: 9600 baud

Transmission speed min. 1200 baud; max.19200 baudHousing 7XP20 For dimensions, see dimension drawingsDimensions see Fig. 13Weight

With housing for surface mounting approx. 4.5 kgWith housing for surface mounting/cubicle mounting approx. 4 kg

Degree of protection acc. to EN 60529Housing IP 51Terminals IP 21


Input circuits

Auxiliary voltage

Binary inputs

Signal contacts

Command contacts

Serial interface(Isolated)

Construction


CE-conformity, standards This product is in conformity with the directives of Conformity is proved by tests performedthe Council of the European Communities on the by Siemens AG in line with article 10 ofapproximation of the laws of the Member States the Council Directives in accordance withrelating to the electromagnetic compatibility (EMC the generic standards EN 50081 andCouncil Directive 89/336/EEC) and concerning EN 50082 for the EMC directive andelectrical equipment for use within specified standard EN 60255-6 for the low-voltagevoltage limits (low-voltage directive 73/23/EEC). directive.The product conforms with the internationalstandard IEC 60255 and the national standardDIN 57 435 Part 303 (corresponding to VDE 0435Part 303).The unit has been developped and manufacturedfor use in industrial areas in accordance with theEMC standard.Standards IEC 60255-5 ANSI/IEEE C37.90.0Voltage test (routine test)

All circuits except DC supply and RS485 2 kV (rms), 50 HzOnly DC voltage supply and RS485 2.8 kV DC

Impulse voltage test (type test) 5 kV (peak), 1.2/50 µs, 0.5 J; 3 positiveAll circuits, class III and 3 negative shots at intervals of 5 s

Test crosswise:Measurement circuits, pilot wire connections,power supply, binary inputs, class III, (no tests cross-wise over open contacts, RS458 interface terminals)

Standards IEC 60255-6; IEC 60255-22 (internationalproduct standard) EN 50082-2 (genericstandard) VDE 0435 Part 303 (Germanproduct standard)

High-frequency test 2.5 kV (peak); 1 MHz; τ = 15 ms;IEC 60255-22-1, VDE 0435 Part 303; class III 400 shots/s; duration 2 sElectrostatic discharge 4/6 kV contact discharge;IEC 60255-22-2, EN 61000-4-2; class III 8 kV air discharge; both polarities; 150 pF;

Ri = 330 ΩRadio-frequency electromagnetic field, 10 V/m 27 to 500 MHznon-modulated report IEC 60255-22-3 class IIIRadio-frequency electromagnetic field, amplitude- 10 V/m 80 to 1000 MHz; AM 80 %; 1 kHzmodulated IEC 61000-4-3; class IIIRadio-frequency electromagnetic field, pulse- 10 V/m, 900 MHz; repetition rate 200 Hz,modulated IEC 61000-4-3/ENV 50204; class III duty cycle 50 %Fast transients/bursts 2 kV; 5/50 ns; 5 kHz; burst length = 15 ms;IEC 60255-22-3, IEC 61000-4-4, class IV repetition rate 300 ms; both polarities;

Ri = 50 Ω; duration 1 minConducted disturbances induced by radio-frequency fields, amplitude-modulated 10 V; 150 kHz to 80 MHz; AM 80 %; 1 kHzIEC 61000-4-6, class IIIPower frequency magnetic field 30 A/m; 50 Hz, continuousIEC 61000-4-8; class IV; EN 60255-6 300 A/m for 3 s; 50 Hz; 0.5 mT , 50 HzOscillatory surge withstand capability 2.5 to 3 kV (peak), 1 MHz to 1.5 MHzANSI/IEEE C37.90.1 (common mode) decaying oscillation; 50 shots per s;

duration 2 s; Ri = 150 Ω to 200 ΩFast transient surge withstand capability 4 to 5 kV; 10/150 ns; 50 shots per sANSI/IEEE C37.90.1 (common mode) both polarities; duration 2 s; Ri = 80 ΩRadiated electromagnetic interference 10 to 20 V/m; 25 to 1000 MHz;ANSI/IEEE C37.90.2 amplitude and pulse modulatedHigh-frequency test 2.5 kV (peak, alternating polarity)Document 17C (SEC) 102 100 kHz, 1 MHz, 10 and 50 MHz,

decaying oscillation; Ri = 50 ΩStandard EN 50081- (generic standard)Conducted interference voltage, auxiliary 150 kHz to 30 MHzvoltage only, EN 55022, VDE 0878 Part 22CISPR 22, limit value class BInterference field strength 30 to 1000 MHzEN 55011, VDE 0875 Part 11,IEC CISPR 11, limit value class A

Insulation tests

EMC-tests;Immunity(type tests)

EMC-tests; emission(type tests)

SIPROTEC 7SD60 Numerical Current Differential Protection Relayfor Two Pilot-Wire LinkTechnical data (continued)

Standards IEC 60255-21; IEC 60068-2Vibration sinusoidalIEC 60255-21-1, class I 10 to 60 Hz; ± 0.035 mm amplitude;IEC 60068-2-6 60 to 150 Hz; 0,5 g acceleration; sweep

rate 1 octave/min; 20 cycles in3 orthogonal axes

Shock half sineIEC 60255-21-2, class I 5 g acceleration, duration 11 ms, 3 shocks

in each direction of 3 orthogonal axesSeismic vibration sinusoidalIEC 60255-21-3, class I 1 to 8 Hz; ±3.5 mm amplitude (horizontal axis)IEC 60068-2-6 1 to 8 Hz; ±1.5 mm amplitude (vertical axis)

8 to 35 Hz; 1 g acceleration (horizontal axis)8 to 35 Hz; 0.5 g acceleration (vertical axis)sweep rate 1 octave/min1 cycles in 3 orthogonal axes

Standards IEC 60255-21; IEC 60068-2Vibration sinusoidalIEC 60255-21-1, class II 5 Hz to 8 Hz: ±7.5 mm amplitudeIEC 60068-2-6 8 Hz to 150 Hz: 2 g acceleration

sweep rate 1 octave/min20 cycles in 3 orthogonal axes

Shock half sineIEC 60255-21-2, class I acceleration 15 g, duration 11 ms, 3 shocksIEC 60068-2-27 shocks in each direction of 3 orthogonal axesContinuous shock half sineIEC 60255-21-2, class I acceleration 10 g, duration 16 ms, 1000IEC 60068-2-29 shocks in each direction of 3 orthogonal axesRecommended temperature -5 to +55 °CLimit temperature

during sevice -20 to +70 °Cduring storage -25 to +55 °Cduring transport -25 to +70 °C(Storage and transport with standard works packing!)

Humidity during service mean value per year ≤75 % relative humidity,on 30 days a year up to 95 % relative humidity,

We recommend arrange the in such a way that they condensation not permissible!are kept from direct sun and from changes intemperature that might reduce condensation.Setting ranges

Current threshold I1 (release by local station current) I/IN Line: 0 to 1.5 (step 0.01)Differential current I/IN Line: 0.5 to 2.5 (step 0.01)Delay time t 0 to 60 s (step 0.01 s)

Restraint by 2nd harmonic (see Fig. 8)2fN /fN 10 to 80 %Reset ratio approx. 0.7 – response value (IRestraint = 0)

Inherent delaysTRIP time for two-ended supply approx. 20 to 28 ms without restraint byat 4 x set value 2nd harmonic

approx. 32 to 42 ms with restraint by2nd harmonic

Release time approx. 35 msTolerances at preset values under reference conditions

Local station current threshold ± 3 % of setpoint, min. 0.02 x INDifferential current ± 5 % of setpoint, min. 0.02 x IN

Influence parametersAuxiliary supply voltage 0.8 ≤ Vaux/VauxN ≤ x 1.15 ≤ 1 %Temperature in range 0 °C ≤ Θamb ≤ 40 °C ≤ 1 %/10 KFrequency in range 0.9 ≤ f/fN ≤ 1.1 ≤ 4 %

Pilot wiresNumber 2

Symmetric telephone pairs are recommendedwith loop resistance 73 Ω/km and capacitance60 nF/km

Core-to-core asymmetry at 800 Hz max. 10-3

Maximum loop resistance 1200 ΩPermissible induced longitudinal voltages

on direct connection of the pilot wires ≤ 1.2 kV, however, max. 60 % of thetest voltage of the pilot wires

for connection via isolating transformer ≥ 1.2 kV, however, max. 60 % of thetest voltage of the pilot wires and max. 60 %of the test voltage of the isolating transformers

Pilot-wire monitoring and intertripping (optional)Monitoring signal 2000 Hz, pulse-code modulationAlarm signal delay 1 to 60 s (step 1 s)Inherent delay time of intertripping approx. 65 msExtension of the intertripping signal 0 to 5 s (step 0.01 s)


Vibration and shock stressduring operation

Climatic stressEN 60255-6IEC 60255-6DIN VDE 0435 Part 303

Line differential protectionAll current values refer to the sym-metrical current using standardconnection.

during transport

(>55 °C/131 °F decreaseddisplay contrast)


Remote tripTripping of the remote endcircuit-breaker for units withpilot-wire monitoring only

Setting rangesProlongation time for transmission to remote station 0 to 60 s (step 0.01 s)Delay time for reception from the remote station 0 to 60 s (step 0.01 s)Prolongation time for reception from the remote station 0 to 60 s (step 0.01 s)

TolerancesDelay time / release delay 1 % and 10 ms respectively

Inherent delayTransmission time without delay approx. 80 ms

Lockout-seal-in of trip command for differential protection and remote tripuntil reset

Lockout reset by means of binary input and/or localoperator panel/DIGSI

Operational measured valuesOperational currents I1, I2, IDiff, IRestraint,Measurement range 0 to 240 % INTolerance (I1) 3 % of rated value or of measured value

Fault event recording Storage of the events relating to the last8 faults

Time-taggingResolution for operational events 1 s

for fault events 1 msFault recording (max. 8 faults)

Storage time (from response or trip command) total of 5 s max., pre- and posttrigger time settableMaximum length per recording Tmax 0.30 to 5.00 s (step 0.01 s)Pre-event time Tpre 0.05 to 0.50 s (step 0.01 s)Post-event time Tpost 0.05 to 0.50 s (step 0.01 s)Time resolution at 50 Hz 1 instantaneous value per 1.66 msTime resolution at 60 Hz 1 instantaneous value per 1.38 ms

Circuit-breaker test Using test circuitPower consumption in thecircuit with standard connectionL1-L3-E (Fig. 9) referred to thethrough-flowing rated current(7SD600 unit in operation).

Connections 4AM4930-7DB 4AM4930-6DBC.t. rated current IN = 1 A IN = 5 ANumber of turns

Primary windings A to B 5 1C to D 10 2E to F 15 3G to H 30 6I to K 30 6K to L 30 6L to M 60 12

Secondary windings Y to Z 1736 1736Thermal rating

Continuous current in Amperes A to B 4.5 20C to D 4.5 20E to F 4.5 20G to H 4.5 20I to K 1.2 6.5K to L 1.2 6.5L to M 1.2 6.5Y to Z 0.2 0.2

Secondary rated current Y to Z 20 mA 20 mAwith standard connection(see Fig. 9) andsymmetrical 3-phase current

Requirements for thecurrent transformers (c.t.) k and k , k

kalf1 alf2K, max

N, c. t.

alf1

alf2

≥ ≤ ≤I

I

34

43

k alf1 accuracy limiting factor side 1k alf2 accuracy limiting factor side 2I K, max through-flowing short-circuit current, max.IN , c.t. primary transformer current

Lockout function

Additional functions

in phase (approx. VA)IN L1 L2 L3

1 ASingle-phase 2.2 1.3 1.7Symmetrical three-phase 0.6 0.2 0.35

5 ASingle-phase 3.5 1.5 2.2Symmetrical three-phase 0.7 0.2 0.5

4AM4930 summation currenttransformer


Numerical current comparison protection 7SD600¨-¨¨A¨0-¨DA0for two pilot-wire link

Rated current; rated frequency20 mA; 50/60 Hz (without external summation current transformer)1 A 50/60 Hz; with external summation c.t. 4AM4930-7DB5 A 50/60 Hz; with external summation c.t. 4AM4930-6DB

Auxiliary voltage supply24, 48 V DC60, 110, 125 V DC220/250 V DC/115 V AC, 50/60 Hz

Mechanical designin housing for panel surface-mounting with terminals at the sidewith terminals on top and bottomin housing for panel flush-mounting or cubicle-mounting

Operating languageEnglish – alternatively either German or Spanish can be selected

Functional scopeDifferential protectionDifferential protection, inrush restraintDifferential protection, pilot-wire monitoring, remote tripDifferential protection, pilot-wire monitoring, remote trip, inrush restraint

Accessories

Copper connection cable 7XV5100-2between PC (9-pin female connector) and converter/protection unit

RS232 - RS485 converterwith connection cable 2.5 m,PC adapterwith plug-in power supply unit 230 V AC 7XV5700-0AA00with plug-in power supply unit 110 V AC 7XV5700-1AA00

Fully-duplex converter fiber-optic RS485auxiliary supply voltage 24 to 250 V DC and 250 V ACSingle optical interface 7XV5650-0AA00Double optical interface (cascadable) 7XV5651-0AA00

DIGSI operating program for protection unit (stage 1)Parameterizing and operation software (without DIGRA)protection unitRequires MS-WINDOWS V3.1, WINDOWS 95or WINDOWS NT 4.0English 7XS5120-1AA0German 7XS5120-0AA0

DIGRA graphical evaluation programfor visualization of fault recordingsin conjunction with DIGSIRequires:MS-WINDOWS V3.1, WINDOWS 95 orWINDOWS NT 4.0 and DIGSIGerman 7XS5130-0AA0English 7XS5130-1AA0

Summation current transformer1 A, 50/60 Hz, for 7SD600 4AM4930-7DB5 A, 50/60 Hz, for 7SD600 4AM4930-6DB

Manual 7SD60English E50417-G1176-C069-A1German E50417-G1100-C069-A1

Catalog SIPROTEC 5.2 ⋅ 1999English E50001--K4405-A121-A1-7600German E50001--K4405-A121-A1

Designation Order No.:

0123


Selection and ordering data

0

BDE

245

015

Fig. 12Connection diagram of the 7SD60 current differential protection

Circuit diagram


Summation c.t.connection

INPUT

Block differential prot.

RESET LED

RESET Lockout

Condensators of the relayoutputs to avoid disturbancesare made of ceramic,4.7 nF, >250 V

–BI1

M2: Disturbance/pilot wire

ALARM RELAY

K2: TRIP command

K1: TRIP command

COMMAND RELAY

Pilot-wire connection

Flush- mounting case

Surface-mounting case, terminals on the side or on top/bottom side

Vaux

M3: Lockout active

LED 2

M1: Device ready

–BI3

–BI2

Power supply

PWM



Fig. 137SD60 with 7XP20 housingfor panel surface-mounting,terminals on the side

Fig. 147SD60 with 7XP20 housingfor panel surface-mountingterminals on top and bottom

Dimensions are indicated in mm;values stated in brackets are inches

Dimension drawings


Fig. 157SD60 with 7XP20 housingfor panel flush-mounting / cubicle-mountingterminals on the rear

Terminals

Wire size Fittings Order No. Order No.(small items) (manufacturer) (Siemens)

Voltage contacts 7 to 31

Ring-cabel lugs Crimp springs contacts1) from Weidmüllerd1 = 4 mm (0.2 in) 0.5 to 1 mm 2 3000 units 162 552 W73073-A2502-C1

1.5 to 2.5 mm2 2500 units 162 550 W73073-A2503-C1Wmax. = 9 mm (0.36 in)Wire size1 to 2.6 mm2

(AWG 16 to 14)1) for panel flush-mounting only

Dimensions are indicated in mm;values stated in brackets are inches

Responsible forTechnical contents: Norbert SchusterSiemens AG, EV S V13, NürnbergE-mail: [email protected] editing: Claudia Kühn-SutionoSiemens AG, EV BK T, Erlangen

Order No.: E50001-K4405-A121-A1-7600Printed in GermanyKGK 0499 3.0 16 En 101108 6101/U868


Conditions of Sale and Delivery

Export Regulations Dimensions

All dimensions in this catalogare given in mm.

Trademarks

All product designations usedare trademarks or productnames of Siemens AG or ofother suppliers.

In accordance with presentprovisions of the GermanExport List and the USCommercial Control List,export licences are notrequired for the productslisted in this catalog.

An export licence mayhowever be required due tocountry-specific application andfinal destination of theproducts.Relevant are the export criteriastated in the delivery note andthe invoice subject possibleexport and reexport licence.Subject to change withoutnotice.

Subject to theGeneral Conditions of Supplyand Deliveryfor Products and Servicesof the Electrical and ElectronicIndustry and to any otherconditions agreed upon withthe recipients of catalogs.

The technical data dimensionsand weights are subject tochange unless otherwisestated on the individual pagesof this catalog.The illustrations are forreference only.

We reserve the right to adjustthe prices and shall charge theprice applying on the date ofdelivery.

A En 1.91a

BereichEnergieübertragung und -verteilungGeschäftsgebiet SekundärsystemePostfach 4806D-90026 Nürnberghttp://www.ev.siemens.de

Siemens Aktiengesellschaft Order No.: E50001-K4405-A121-A1-7600

Documents

7SD600x Catalogue[1]