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DIFFERENTIAL RELAYS
2

DIFFERENTIAL RELAYS

DIFFERENTIAL RELAYS

(OP)
Info about we want to protect of Transformer

S : 100 MVA

HV/LV : 154.000 / 33.600 Volt

%Uk : 12,0

Connection: Ynyn0

Primer Side CT : 400 / 5 Amper

Seconder Side CT : 2000 / 5 Amper

do anybody calculate differantial setting values for that transformer ?

What should i set below values ?

Is1 (pickup) = ? pu

K1 : ? %

Is2 : ? pu

K2 : ? %

THANKS FOR YOUR ATTENTION

BEST WISHES...
 

RE: DIFFERENTIAL RELAYS

2
Are you serious? You want to protect a transformer worth in the order of US$1 million based on information gained for free from the internet? Get a qualified and experienced protection engineer to do the calculations for you.
  

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If we learn from our mistakes I'm getting a great education!
 

RE: DIFFERENTIAL RELAYS

SEFAILI,

Unfortunately you  are in way over your technical capabilities. Get some help!!There are more items to consider thant just the transformer differential settings.I'll bet you did not ask for the transformer technical data sheets or the technical information on the protection relays,the type of gronuding or the detailed information on the transformer such as winding time constant, etc.
Jack

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