PD levels in cast-resin dry type transformers 2

[edison123]

Is there any reference / standard for allowable partial discharges (in pico coulombs) for cast-resin dry type transformers ? I am looking for PD values for 11 KV/433 V, 500 KVA Trafos.

Thanks in advance.

*Why a man thinks he outrun a chasing dog when it has twice as many legs?*

 

[ausphil]

Depends on where you're coming from, but in IEC 60076-11:2004, the level is 10pC at 1.3Urated.

 

[edison123]

Thanks ausphil. IEC is fine.

When you say 1.3 U rated, shall I take it as the line-to-line voltage and not phase voltage ?

Any temperature limit while measuring the pd ?



*Why a man thinks he outrun a chasing dog when it has twice as many legs?*