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Function overview

Description

Siemens SIP · 2008

12 Motor Protection / 7SK80

12/9

Protection functions

•

Time-overcurrent protection

(50, 50N, 51, 51N)

•

Directional overcurrent protection, ground

(67N)

•

Sensitive dir./non-dir. ground-fault

detection (50Ns, 67Ns)

•

Displacement voltage (64)

•

Inrush restraint

•

Motor protection

– Undercurrent monitoring (37)

– Starting time supervision (48)

– Restart inhibit (66/86)

– Locked rotor (14)

– Load jam protection (51M)

•

Overload protection (49)

•

Temperature monitoring

•

Under-/overvoltage protection (27/59)

•

Under-/overfrequency protection (81O/U)

•

Breaker failure protection (50BF)

• Phase unbalance or negative-sequence

protection (46)

• Phase-sequence monitoring (47)

• Lockout (86)

Control functions/programmable logic

• Commands for the ctrl. of CB, disconnect

switches (isolators/isolating switches)

• Control through keyboard, binary

inputs, DIGSI 4 or SCADA system

• User-defined PLC logic with CFC

(e.g. interl.)

Monitoring functions

•

Operational measured values V, I, f

•

Energy metering values W

, W

•

Circuit-breaker wear monitoring

•

Minimum and maximum values

•

Trip circuit supervision

•

Fuse failure monitor

•

8 oscillographic fault records

•

Motor statistics

Communication interfaces

•

System/service interface

– IEC 61850

– IEC 60870-5-103

–PROFIBUS-DP

–DNP3.0

–MODBUSRTU

•

Ethernet interface for DIGSI 4

•

USB front interface for DIGSI 4

Hardware

•

4 current transformers

•

0/3 voltage transformers

•

3/7 binary inputs (thresholds

configurable using software)

•

5/8 binary outputs (2 changeover/

Form C contacts)

•

0/5 RTD inputs

•

1 live-status contact

•

Pluggable current and voltage terminals

SIPROTEC Compact 7SK80

Motor Protection Relay

The SIPROTEC Compact 7SK80 is a multi-

functional motor protection relay. It is de-

signed for asynchronous induction-type

motors of all sizes. The relays have all the

functionality to be applied as a backup relay

to a transformer differential relay.

The 7SK80 features “flexible protection

functions”. 20 additional protection func

tions can be created by the user. For exam

ple, a rate of change of frequency function

or a reverse power function can be created.

The relay provides circuit-breaker control,

additional primary switching devices

(grounding switches, transfer switches and

isolating switches) can also be controlled

from the relay. Automation or PLC logic

functionality is also implemented in the

relay. The integrated programmable logic

(CFC) allows the user to add own func

tions, e.g. for the automation of switch-

gear (including: low voltage starting, auto

matic restart, interlocking, transfer and

load shedding schemes). The user is also

allowed to generate user-defined messages.

The communication module is independ

ent from the protection. It can easily be

exchanged or upgraded to future commu

nication protocols.

Fig. 12/6

SIPROTEC 7SK80

motor protection r elay

LSP2874.tif

Highlights

Removable current and voltage terminals

provide the ideal solution for fast and

secure replacement of relays.

Binary input thresholds and current taps

are software settings. There is thus no need

to ever open the relay to adapt the hardware

configuration to a specific application.

The relay provides 9 programmable func

tion keys that can be used to replace push-

buttons, select switches and control switches.

The battery for event and fault recording

memory can be exchanged from the front

of the relay.

The relay is available with IEC 61850 for

incredible cost savings in applications (e.g.

transfer schemes with synch-check, bus

interlocking and load shedding schemes).

This compact relay provides protection,

control, metering and PLC logic functional

ity. Secure and easy to use one page matrix

IO programming is now a standard feature.

The housing creates a sealed dust proof

environment for the relay internal elec-

tronics. Heat build up is dissipated through

the surface area of the steel enclosure. No

dusty or corrosive air can be circulated

over the electronic components. The relay

thus will maintain its tested insulation

characteristic standards per IEC, IEEE,

even if deployed in harsh environment.

Revised Oct. 2008

1 2 3 4 5 6 ... 35 36

Inhaltsverzeichnis

Seite 1 - Motor Protection Relay

Function overviewDescriptionSiemens SIP · 200812 Motor Protection / 7SK801212/9Protection functions•Time-overcurrent protection(50, 50N, 51, 51N)•Dire

Seite 2

Siemens SIP · 200812 Motor Protection / 7SK801212/18The relay offers flexibility with reference toits communication to substation automa-tion systems

Seite 3

Siemens SIP · 200812 Motor Protection / 7SK801212/19DNP 3.0 protocolPower utilities use the serial DNP 3.0 (Dis-tributed Network Protocol) for the sta

Seite 4

Siemens SIP · 200812 Motor Protection / 7SK801212/20Typical connectionsnConnection of currentand voltage transformersStandard connectionFor grounded n

Seite 5

Siemens SIP · 200812 Motor Protection / 7SK801212/21Typical connectionsConnection for compensated networksThe figure shows the connection of twophase-

Seite 6

Siemens SIP · 200812 Motor Protection / 7SK801212/22Typical applicationsOverview of connection typesType of network Function Current connection Voltag

Seite 7

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 1Technical dataGeneral unit dataAnalog current inputsRated frequency fN50 or 60 H

Seite 8

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 2Technical dataInsulation tests (cont'd)Impulse voltage test (type test)All

Seite 9

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 3Technical dataUnit design (cont'd)Degree of protectionacc. to EN 60529For e

Seite 10 - 12 Motor Protection / 7SK80

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 4Technical dataSystem interface (cont'd)Transmission rate Up to 19200 baudBr

Seite 11

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 5Technical dataCold-load pickup/dynamic setting changeControllable functions Time

Seite 12

Siemens SIP · 200812 Motor Protection / 7SK801212/10ApplicationFig. 12/7 Function diagramThe SIPROTEC Compact 7SK80 unit is anumerical protection rela

Seite 13

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 6Technical dataNegative-sequence protection (ANSI 46)Definite-time characteristic

Seite 14 - Overview of connection types

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 7Technical dataRestart inhibit for motors (ANSI 66)Setting rangesMotor starting c

Seite 15 - Technical data

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 8Technical data(Sensitive) ground-fault protection (ANSI 64, 50Ns, 51Ns, 67Ns) (c

Seite 16

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 9Technical dataFlexible protection functions (e.g. ANSI 27, 32, 37, 47, 50, 55, 5

Seite 17

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 10Technical dataLong-term averagesTime window 5, 15, 30 or 60 minutesFrequency of

Seite 18

Siemens SIP · 200812 Motor Protection / 7SK8012Technical Data page 11Technical dataClockTime synchronization Binary input,communicationSetting group

Seite 19

Siemens SIP · 200812 Motor Protection / 7SK801212/23Selection and ordering dataDescription Order No.7SK80 motor protection device 7SK80oo – ooooo – oo

Seite 20

Siemens SIP · 200812 Motor Protection / 7SK801212/24seefollowingpageSelection and ordering dataDescription Order No. Ordercode7SK80 motor protection d

Seite 21

Siemens SIP · 200812 Motor Protection / 7SK801212/25Description Order No.7SK80 motor protection device 7SK80oo – ooooo – o H o 0Designation ANSI No. D

Seite 22

Siemens SIP · 200812 Motor Protection / 7SK801212/26Sample orderPosition Order No. + Order code7SK8051-5EC96-3HD0+L0G6 I/O’s: 3 BI/5 BO, 1 live status

Seite 23

Siemens SIP · 200812 Motor Protection / 7SK801212/11ApplicationANSI No. IEC Protection functions50, 50NI>, I>>, I>>>, IE>, IE>

Seite 24

Siemens SIP · 200812 Motor Protection / 7SK801212/27Connection diagramFig. 12/24 7SK801 connection diagram

Seite 25

Siemens SIP · 200812 Motor Protection / 7SK801212/28Fig. 12/25 7SK802 connection diagramConnection diagram

Seite 26

Siemens SIP · 200812 Motor Protection / 7SK801212/29Connection diagramFig. 12/26 7SK803 connection diagram

Seite 27

Siemens SIP · 200812 Motor Protection / 7SK801212/30Connection diagramFig. 12/27 7SK804 connection diagram

Seite 28 - Selection and ordering data

Siemens SIP · 200812 Motor Protection / 7SK801212/31Connection diagramFig. 12/28 7SK805 connection diagram*) The shielding of the connecting cableis c

Seite 29

Siemens SIP · 200812 Motor Protection / 7SK801212/32Connection diagramFig. 12/29 7SK806 connection diagram*) The shielding of the connecting cableis c

Seite 30 - Connection diagram

Siemens SIP · 200812 Motor Protection / 7SK801212/33Dimension drawings in mm / inchFront viewSide viewRear viewFig. 17/227SJ80/7SK80 protection unitfo

Seite 31

Siemens SIP · 200812 Motor Protection / 7SK801212/12Protection functionsAvailable inverse-time characteristicsCharacteristics acc. to ANSI/IEEE IEC 60

Seite 32

Siemens SIP · 200812 Motor Protection / 7SK801212/13Protection functionsDirectional overcurrent protection, ground(ANSI 67N)Directional ground protect

Seite 33

Siemens SIP · 200812 Motor Protection / 7SK801212/14Protection functionsFlexible protection functionsThe 7SK80 enables the user to easily addup to 20

Seite 34

Siemens SIP · 200812 Motor Protection / 7SK801212/15Protection functionsFig. 12/11nMotor protectionRestart inhibit (ANSI 66/86)If a motor is subjected

Seite 35

Siemens SIP · 200812 Motor Protection / 7SK801212/16Protection functionsnVoltage protectionOvervoltage protection (ANSI 59)The two-element overvoltage

Seite 36

Siemens SIP · 200812 Motor Protection / 7SK801212/17Chatter disableThe chatter disable feature evaluateswhether, in a set period of time, the num-ber

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