Miniature SAC Feeder Management Protection Relay Power Substation Industrial Transmission Lines High Power Contact Load Sealed

3 stages earth fault 50N/51N Protection relay
Overcurrent inverse time-limit protection
High power contact load relay
Sealed miniature relay
SAC PSL691U relay
Overcurrent inverse time-limit protection
Low Voltage Load Shedding

Measurement and Control device PS690U series of protection by the line protection, transformer protection, capacitor

protection, reactor protection, standby power from the cast, composed of motor protection, can be used for 110kV and below voltage levels of various industrial and mining enterprises and power industry. By using a high-performance CPU to integrate protection, measurement and control, and communication functions, it is suitable for substation integrated automatic systems or new energy power plant electrical automation systems.

Main protection function:

* 3-stage composite voltage overcurrent protection

* 3-stage directional zero-sequence overcurrent protection

* Overload protection

* 3-phase Autoreclosing

* Manual closing synchro-check

* Closing Post-acceleration protection

* Low frequency load shedding

* Undervoltage load shedding

* Lower current ground wire selection

* I，U，P，Q，Cosφ，kWh，kVarh，15-channel DI

* B code time-check and NTP time-check