11kv BUSBAR PROTECTION
11kv BUSBAR PROTECTION
(OP)
We have got synch.generator 11KV rating ,ifthe generator is running the earth fault at 11KV busbar is cleared, if not the relay is activated
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RE: 11kv BUSBAR PROTECTION
If the earth fault is cleared, that seems normal. What type of relay is it that is activated when the generator is not running?
RE: 11kv BUSBAR PROTECTION
RE: 11kv BUSBAR PROTECTION
Can you please provide a better discription of what you have and what problem you are having? I really don't know what you are asking.
RE: 11kv BUSBAR PROTECTION
What is the group of the step up transformer?
What is the neutral condition without the generator?
Is the generator neutral connected to ground?
The neutral connection is by impedance?
How many connections to ground are there?
Is the activated protection a busbar protection or a transformer protection?
What kind of protection is that?
RE: 11kv BUSBAR PROTECTION
1-4.nos step up transformer is 11/220KV ,31MVA,Zk=12% and neutarl is grounding from the secondary site
2.the neutarl of generator is small resistance 10A/10S
3.the earth resistance of the plant .8 Ohm
4.without gasturbine 11KV system has only earthing through voltage transformer and the natural system capacitances to earth
5-The neutral of busbar is solidy(no neutarl)
6-the protection is at busbar 11KV and is earth fault