Protection function:

▪ Three phase three-stage directional current protection (quick break, time limited quick break, overcurrent, reverse time limit) with composite voltage lockout function

▪ Three phase one-time reclosing, with optional front acceleration and rear acceleration

▪ PT disconnection lockout voltage protection

▪ Equipped with low current grounding line selection function

▪ Low voltage protection no-voltage protection

▪ Low frequency load shedding protection for low-voltage locking and slip locking

▪ Overload protection (trip and alarm optional)

▪ Zero sequence overvoltage protection

▪ Zero sequence overcurrent protection (trip and alarm optional)

Scope of application:

This device is suitable for incoming and feeder protection measurement and control in systems with arc suppression coil grounding or ungrounded voltage levels of 10KV and below. It can be centrally assembled and installed on-site in the switchgear, fully supporting the comprehensive automation system of the substation.