1. Safe and reliable
2. High quality and competitive price
3. With function of "four remotion".

    YD-380 transformer backup monitoring and controlling protection device is used to protect, measure and control the backup protection for transformer with voltage 35kV and below, which can be installed in the switchgear. It has functions of tele-control, tele-metering, tele-signaling and tele-adjusting.

Product functions

1. Three-level complex voltage locking over-current protection

2. Overload protection

3. Over-current post-acceleration protection

4. PT line-breaking alarm

5. Control circuit abnormal alarm

6. Independent operating circuit