Additional Check CTs for double bus bar proection
Additional Check CTs for double bus bar proection
(OP)
Hi everyone,
I have been encountered with a situation where my client wants me to put "SEPARATE CHECK CTs FOR EACH BUS SECTION" across the Bus Coupler, balanced by other check CTs in that particular bus section. The the usual bus wires stuff put into operation by isolator aux switches. Its a 132kv double bus configuration and we are in U.K (if that may help). I want to know is it required to put separate check CTs for each bus zone beacuse this is not a genaral practice. What could be the pros and cons (except price related matters)?
Your expert opinion is requested.
Regards
SMA
I have been encountered with a situation where my client wants me to put "SEPARATE CHECK CTs FOR EACH BUS SECTION" across the Bus Coupler, balanced by other check CTs in that particular bus section. The the usual bus wires stuff put into operation by isolator aux switches. Its a 132kv double bus configuration and we are in U.K (if that may help). I want to know is it required to put separate check CTs for each bus zone beacuse this is not a genaral practice. What could be the pros and cons (except price related matters)?
Your expert opinion is requested.
Regards
SMA






RE: Additional Check CTs for double bus bar proection
RE: Additional Check CTs for double bus bar proection
Your expert opinion is requested.
Regards
SMA
RE: Additional Check CTs for double bus bar proection
What will be the switching arrangement of the CTs be?
RE: Additional Check CTs for double bus bar proection
If yes, most or all of BB numerical relays do not have check zone feature.
But for old relays (High impedance) it is required to have a seperate check zone relay supplied form different CTs in order to insure correct operation of BB protection.
RE: Additional Check CTs for double bus bar proection