Transformer protection
Transformer protection
(OP)
I am working on a circuit design for a 3 Phase balanced load of 35A at 600 VAC. A 150 KVA transformer and 100A fuse disconnect switch (FDS) panel with 40A overload relay is available as spare. I want to make use of both 150 KVA transformer and aforementioned fuse disconnect switch instead of buying additional equipment. Here is how I intend to proceed.
1. Use 150 KVA transformer with 100A fuse disconnect
switch and fuse it at 60A [based on existing load of 35A] sizing the conductor accordingly. Instead of transformer current rating.
2. Transformer secondary to be protected by a 125% FDS.
3. Remove overload relay
Comments/ concerns, suggestion are highly appreciated.
1. Use 150 KVA transformer with 100A fuse disconnect
switch and fuse it at 60A [based on existing load of 35A] sizing the conductor accordingly. Instead of transformer current rating.
2. Transformer secondary to be protected by a 125% FDS.
3. Remove overload relay
Comments/ concerns, suggestion are highly appreciated.






RE: Transformer protection
Is 600V on the high or low side of the transformer? What is the other side's voltage and grounding?
Are the 60A fuses on the high or low side of the transformer?
RE: Transformer protection