Transformer differential protection
Transformer differential protection
(OP)
There is a 10 MVA transformer, 46kV/4.2kV, delta-delta with available bushings CTs in the LV side. New dead tank breakers with CTs are installed in the 46kV.
It is possible to use the existing CTs in the transformer to implement a differential protection?
Thanks
It is possible to use the existing CTs in the transformer to implement a differential protection?
Thanks






RE: Transformer differential protection
RE: Transformer differential protection
RE: Transformer differential protection
But it is frustrating when the squirrel gets across the transformer bushings and the differential doesn't trip, subjecting the transformer to a 50 cycle through-fault at a very high current level. Speaking hypothetically, of course.
David Castor
www.cvoes.com
RE: Transformer differential protection
On the other hand, the arrestors on that side of the transformer aren't going to trip the differential.
If the feds really wanted to protect the electrical system against terrorists, they'd be after those suicidal squirrels and not worry nearly so much about much more complex and difficult attacks.
RE: Transformer differential protection
Re. comments above: Does this transformer have cable boxes or air bushings? Over here it would be unusual to see an open terminal substation at such a low voltage, and bus duct is usually confined to very heavy loads.
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If we learn from our mistakes I'm getting a great education!
RE: Transformer differential protection
RE: Transformer differential protection
RE: Transformer differential protection
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If we learn from our mistakes I'm getting a great education!
RE: Transformer differential protection
We've had some changes in the laws regarding sale of scrap metal and it seems to have reduced cable theft quite a bit in my little part of the world. Or the meth addicts have found something more valuable to steal.
David Castor
www.cvoes.com
RE: Transformer differential protection
arrestors , terrorists, suicidal squirrels, attacks...
my god, I do not understand anything of what you said!