Multifunction Protection Relay Block 7SJ63 With (1No)

Features and technical specifications:

1. Trip circuit supervision
2. Fuse failure monitor
3. 8 oscillographic fault records
4. lexible number of switching devices
5. Position of switching elements is shown on the graphic display
6. Local/remote switching via key operated switch
7. Control via keyboard, binary inputs, DIGSI 4 or SCADA system
8. Extended user-defined logic with CFC (e.g. interlocking)

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
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 Multifunction Protection Relay block is easily insert in your schematic diagram and connect as you like way.

The SIPROTEC 4 7SJ63 can be used as a protective control and monitoring relay for distribution feeders and transmission lines of any voltage in networks that are earthed (grounded), low-resistance earthed, unearthed, or of a compensated neutral point structure. The relay is suited for networks that are radial or looped, and for lines with
single or multi-terminal feeds. Regarding the time-overcurrent/directional timeovercurrent protection the characteristics can be either definite time, inverse time or user-defined. The relay provides easy-to-use local control
and automation functions. The number of controllable switchgear depends only on the number of available inputs and outputs. The integrated programmable logic (CFC) allows the user to implement their own functions, e.g. for the automation of switchgear (interlocking). The user is able to generate user defined messages as well. The SIPROTEC 4 7SJ63 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-to-read graphic display was a major design aim.

1. Line protection :-
   The 7SJ63 units can be used for line protection of high and medium-voltage networks with earthed (grounded), low-resistance earthed, isolated or compensated neutral point.
2. Motor protection :-
   When protecting motors, the 7SJ63 relays are suitable for asynchronous machines of all sizes.
3. Transformer protection :-
   The 7SJ63 units perform all functions of backup protection supplementary to transformer differential protection. The inrush suppression effectively prevents tripping by inrush currents. The high-impedance restricted earth-fault protection detects short-circuits and insulation faults on the transformer.
4. Backup protection :-
   The relays can be used universally for backup protection.