Hi...
We are facing problems in power fluctuation which leads to burnt fuses and defected thyristors in the RRU.
I heard that there is a device that or a drive containing IGPTs that can be put before the RRU. And this will save the RRUfuses and thyristorsduring power fluctuation or power cut.
If any one knows any information about this drive (part no., specs., features, ... etc.) please reply

But than it’s not because of the power fluctuation, it’s due to the RRU Interface card faulty. When replace the card please ensure the resistor on the card are same value or may use the old resistor back.

Thyr Grnd Fault is also could happen due to the Interface card.