Multifunction Protection Relay Block 7SJ62 With (1NO)

Features and technical specifications:

1. Motor Protection
2. CT inputs : 4 No’s
3. VT inputs : 3 No’s
4. Binary inputs : 8/11 No
5. Binary output’s : 8/6 NO
6. Slave pointer
7. Trip circuit supervision
8. Fuse failure monitor
9. 8 oscillographic fault records
10. External DC power supply required
11. RS485 Communication Port

The following functions are available

1. Time-over current protection (definite-time/inverse-time/user-def.)
2.  Directional time-over current protection (definite-time/inverse-time/user-def.)
3. Sensitive dir./non-dir. earth-fault detection
4. Displacement voltage
5. Intermittent earth-fault protection
6. High-impedance restricted earth fault
7. Inrush restraint
8. Motor protection
   – Undercurrent monitoring
   – Starting time supervision
   – Restart inhibit
   – Locked rotor
9.  Overload protection
10. Temperature monitoring
11. Under-/overvoltage protection
12. Under-/overfrequency protection
13. Breaker failure protection
14. Negative-sequence protection
15. Phase-sequence monitoring
16. Auto-reclosure
17. Fault locator
18. Lockout

This Multi function Protection Relay 7SJ62 Block is easily insert in your schematic diagram and connect as you like way.

For motor protection, the SIPROTEC 4 7SJ62 is suitable for asynchronous machines of all sizes. The relay performs all functions of backup protection supplementary to transformer differential protection. The relay provides a simple control of the circuit-breaker and automation functions. The integrated programmable logic (CFC) allows the user to implement their own functions, e. g. for the automation of switchgear (interlocking). The user is also allowed to generate user-defined messages. The flexible communication interfaces are open for modern communication architectures with control systems. The SIPROTEC 4 7SJ62 unit is a numerical protection relay that also performs control and monitoring functions and therefore supports the user in cost-effective power system management, and ensures reliable supply of electric power to the customers. Local operation has been designed according to ergonomic criteria. A large, easy-toread display was a major design aim.