Protection function

Three phase three-stage current protection (quick break, time limited quick break, overcurrent, reverse time limit)

Overload protection (trip and alarm optional)

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 and building system protection measurement and control in factories and mines, it can be centrally assembled into screens or installed on-site in switchgear, fully supporting the comprehensive automation system of substations.

Schematic diagram of device operation circuit