Transformer MCB
Transformer MCB
(OP)
In my control panel, I have a type B 16Amp MCB for a 240v-110v transformer.
Every time when I started the panel, the MCB always tripped. Not only that, it also tripped the mains' MCB. (I didn't design the panel)
Later on I learned that a D type MCB is more suitable for a transformer.
Once the control panel is up and running, it seems to work fine and the MCB doesn't trip.
So I'm just wondering if I can get away with leaving the MCB I have already got in there or do I have to replace it with a type D?
Thanks
Every time when I started the panel, the MCB always tripped. Not only that, it also tripped the mains' MCB. (I didn't design the panel)
Later on I learned that a D type MCB is more suitable for a transformer.
Once the control panel is up and running, it seems to work fine and the MCB doesn't trip.
So I'm just wondering if I can get away with leaving the MCB I have already got in there or do I have to replace it with a type D?
Thanks






RE: Transformer MCB
Rafiq Bulsara
http://www.srengineersct.com
RE: Transformer MCB
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RE: Transformer MCB
I would think that if the Main is occasionally tripping, it would indicate that his inrush may already be exceeding what a C curve will hold at, no?
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RE: Transformer MCB
There are lot of B curve MCBs in the UK - seems to be the default offering by most manufacturers. I tend to use a C curve as default for a circuits feeding sockets, but it's by no means a standard. It's not that hard to trip a 32A type B MCB by plugging in a portable tool transformer or similar.
It would help to know what type of transformer, and what size, was involved, then we wouldn't have to guess!
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If we learn from our mistakes I'm getting a great education!
RE: Transformer MCB
3 KvA Transformer 240v-110v, does this help?
RE: Transformer MCB
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If we learn from our mistakes I'm getting a great education!