Hi, we have a 30/0.4kV, 1600KVA Dyn11 transformer. After checking for imbalances in the primary phase currents, we connected relay software and noticed the presence of homopolar (zero sequence) current.
I suspect that our power cable supplying the transformer could be starting to develop a...
Hi,
We have a distribution transformer 30/0.4kV 1.6MVA, which has the primary currents unbalanced. Secondary currents looks balanced +/- 80A. The transformer supply to MCC which has motor an single phase loads.
We've made insulation test 5000V 1 min, on primary side and the results are GOhms...
Hi everyone,
I've been recently involved in a brown field project. It is a 25 years old plant which was powered by generator at first "stage 0" and later on a electrical overhead line was built so they included a distribution transformer.
As you can See under Stage 0, we have two generators...
hi everyone,
we have under our facilities a 6kV swgr UNIGEAR ZS1, ABB made. Recently we had a fault in one of our motor starter panels (Fuse contactor VD4 type). The rear part of the contactor compartment is quite damaged.
In the same swgr we have a spare panel identical to the faulty one...
