Effect of cable shield grounding on CTs for KWH meters
Effect of cable shield grounding on CTs for KWH meters
(OP)
Our local utility has told us that all high voltage cable shields must be grounded before the CTs. Ostensibly if the shield is grounded after the meter an error will be introduced.
We are not interested in revenue; all we want are ballpark KW demand and KVA measurements. If the amount of error is small, then so be it. The cost of rearranging the cable shield ground will very high.
Comments please.
We are not interested in revenue; all we want are ballpark KW demand and KVA measurements. If the amount of error is small, then so be it. The cost of rearranging the cable shield ground will very high.
Comments please.






RE: Effect of cable shield grounding on CTs for KWH meters
One alternative MIGHT be to simply lift the ground at your end, rather than relocating it. In that case the cable will still be grounded and no circulating current will flow, but you'll have to be careful to understand whether dangerous votlages might appear on your ungrounded end of the shield during fault scenario's.
RE: Effect of cable shield grounding on CTs for KWH meters
Is there any other issue concerning the presence of the shield and ground lead in the window?
RE: Effect of cable shield grounding on CTs for KWH meters
RE: Effect of cable shield grounding on CTs for KWH meters
I'm not sure I understand busbar's comment about desensitization.
RE: Effect of cable shield grounding on CTs for KWH meters
RE: Effect of cable shield grounding on CTs for KWH meters
Hope I didn't ramblr too much.