Multifunction Protection Relay Block 7SJ66 With (1NO)

Features and technical specifications:

1. Screw-type current terminals
2. Spring or Screw-type Voltage and Binary I/O terminals
3. 4 current transformers
4. 4 voltage transformers
5. 16/22/36 binary inputs
6. 7/10/23 output relays
7. Graphical or 8 line text display

The following functions are available :

1. Protection functions (continued)
2. Inrush restraint
3. Motor protection
4. Overload protection
5. Temperature monitoring
6. Under-/overvoltage protection
7. Under-/over frequency protection
8. Rate-of-frequency-change protection
9. Power protection (e.g. reverse, factor)
10. Undervoltage controlled reactive power protection
11. Breaker failure protection
12. Negative-sequence protection
13. Phase-sequence monitoring
14. Synchro-check
15. Fault locator
16. LockoutAuto-reclosure

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

SIPROTEC 7SJ66 is featuring the “flexible protection functions”. Up to 20 protection functions can be added according to individual requirements. Thus, for example, a rate-of-frequency-change protection or reverse power protection can be implemented. The relay provides control of the circuit-breaker, further switching devices and automation functions. The integrated graphical logic editor (CFC) allows the user to implement its own functions, e. g. for the automation of switchgear (interlocking). The communication interfaces support the easy integration into modern communication networks. The SIPROTEC 7SJ66 unit is a numerical protection relay that also performs control and monitoring functions and therefore supports the user in cost-effective power system management. The
relay ensures reliable supply of electric power to the customers. Local operation has been designed according to ergonomic criteria. A large, easy-to-read display was a major design aim.

Control :-
The integrated control function permits control of disconnect devices, grounding switches or circuit-breakers via the integrated operator panel, binary inputs, DIGSI 4 or the control and protection system (e.g. SICAM). The present status (or position) of the primary equipment can be displayed, in case of devices with graphic display. A full range of command processing functions is provided. Programmable logic The integrated logic characteristics (CFC) allow the user to implement their own functions for automation of switchgear (interlocking) or a substation via a graphic user interface. The user can also generate user-defi ned messages.
Line protection :-
The SIPROTEC 7SJ66 units can be used for line protection of high and medium-voltage networks with earthed (grounded), low-resistance grounded, isolated or compensated neutral point.

Synchro-check :-
In order to connect two components of a power system, the relay provides a synchro-check function which verifies that switching ON does not endanger the stability of the power system.

Motor protection :-
When protecting motors, the SIPROTEC 7SJ66 relay is suitable for asynchronous machines of all sizes.

Transformer protection :-
The relay performs all functions of backup protection supplementary to transformer differential protection. The inrush suppression effectively prevents tripping by inrush currents. The high-impedance restricted ground-fault protection detects short-circuits and insulation faults on the transformer.

Backup protection :-

The SIPROTEC 7SJ66 can be used universally for backup protection.

Flexible protection functions :-
By configuring a connection between a standard protection logic and any measured or derived quantity, the functional scope of the relays can be easily expanded by up to 20 protection stages or protection functions.

Metering values :-

Extensive measured values, limit values and metered values permit improved system management.