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)

▪ Non electricity protection (heavy gas, light gas, over temperature, over temperature)

Scope of application:

This device is suitable for transformer protection at voltage levels of 10KV and below, and for protection and measurement of 10KV (6KV)/0.4KV distribution transformers and 10KV small capacity step-down transformers. Specially suitable for power systems, distribution in factories and mines, and distribution protection measurement and control in building systems. It can be centrally assembled into screens or installed on-site in switchgear, fully supporting the comprehensive automation system of substations.