Multifunction Protection Relay Block 7SJ66 with 2 NO and 2NC ( 7SJ6622 )

Type : 7SJ66

Features and technical specifications:

1. Motor Protection
2. CT inputs : 4 No’s
3. VT inputs : 4 No’s
4. Binary inputs : 16/22/36 No
5. Output relays :  7/10/23 No                                                                                                                                                                                                                                     The following functions are available
   1. Over current protection
   2. Overload protection
   3. Sensitive directional ground-fault detection
   4. Under-/over voltage protection
   5. Under-/over frequency protection
   6. Rate-of-frequency-change protection
   7. Power protection (e.g. reverse, factor)
   8. Breaker failure protection
   9. Negative-sequence protection

   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 switch gear (interlocking). The communication interfaces support the easy integration into modern communication networks. 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. 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. 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.