Siemens Siprotec 7SJ66 Numerical Protection Relay

Product Description

Siemens Siprotec 7SJ66 Relay 

The SIPROTEC 7SJ66 unit is a numerical protection, control,and monitoring device. SIPROTEC 7SJ66 is featuring the "flexibleprotection functions". Up to 20 protection functions can be addedaccording to individual requirements. Thus, for example, a rate-of-frequency-changeprotection or reverse power protection can be implemented.The relay providescontrol of the circuit-breaker, further switching devices and automationfunctions. The integrated Graphical logic editor (CFC) allows the user toimplement its own functions, e. g. for the automation of switchgear(interlocking). The communication interfaces support the easy integration intomodern communication networks.

Protection functions

1. Overcurrent protection
2. Directional overcurrent protection
3. Sensitive directional ground-fault detection
4. Displacement voltage
5. Intermittent ground-fault protection
6. Directional intermittent ground fault protect
7. High-impedance restricted ground fault
8. Inrush restraint
9. Motor protection
10. Overload protection
11. Temperature monitoring
12. Under-/overvoltage protection
13. Under-/overfrequency protection
14. Rate-of-frequency-change protection
15. Power protection (e.g. reverse, factor)
16. Undervoltage controlled reactive power protection
17. Breaker failure protection
18. Negative-sequence protection
19. Phase-sequence monitoring
20. Synchro-check
21. Fault locator
22. Lockout
23. Auto-reclosure

Control functions/programmable logic

1. Commands for control of CB and of isolators
2. Graphical visualization of switch positions
3. Control via keyboard, binary inputs, DIGSI 4 or SCADA system
4. User-defined logic with CFC (e.g. interlocking)

Monitoring functions

1. Operational measured values V, I, f
2. Energy metering values Wp,Wq
3. Circuit-breaker wear monitoring
4. Slave pointer
5. Trip circuit supervision
6. Fuse failure monitor
7. 8 oscillographic fault records
8. Motor statistics

Languages

1. English, Spanish, Russian, Polish and Turkish

Communication interfaces

3.       Electricaland optical interface

5.       Serviceinterface for DIGSI 4 or RTD-Box

7.       Timesynchronization via IRIG B, DCF77

Hardware

1. Spring-type terminals
2. 4 current transformers
3. 4 voltage transformers
4. 16/22/36 binary inputs
5. 7/10/23 output relays
6. Graphic or 8 line display