jumper sizing for TRV capacitor application
jumper sizing for TRV capacitor application
(OP)
How do you size a jumper for a TRV capacitor.
Specifically in our case
We have a TRV cap, which connects to a 2-2500 kcmil AAC line conductor through a 250 kcmil AA jumper.
Capacitor rating is 30nF, 80kA at 138kV.
I will appreciate any help or direction I could get.
Thanks
Specifically in our case
We have a TRV cap, which connects to a 2-2500 kcmil AAC line conductor through a 250 kcmil AA jumper.
Capacitor rating is 30nF, 80kA at 138kV.
I will appreciate any help or direction I could get.
Thanks






RE: jumper sizing for TRV capacitor application
I saw you noted 80kA on the capacitor rating. The capacitor itself is not rated for 80kA, but rather it's added to the breaker to allow the breaker to be rated for 80kA.
RE: jumper sizing for TRV capacitor application
thanks for your response. Could you tell me why is that you think 250kcmil AA is fine for this application? You are comment about 80kA is correct.
Thanks
RE: jumper sizing for TRV capacitor application
Because the capacitor is a high impedance to ground, i.e. very little current flow steady state, in the range of 1 A or so.
Plus, I worked for a company that made TRV caps for 15 yrs and I know that 250kcmil was a typical jumper size used...even seen smaller where corona wasn't a concern.
RE: jumper sizing for TRV capacitor application
Can someone recommend some TRV capacitor vendors ?
RE: jumper sizing for TRV capacitor application
RE: jumper sizing for TRV capacitor application
Capacitance: 2 x 10,000 pF or 1 x 20,000 pF at 60 Hz and 100 kHz
Tolerance on capacitance: ±10% at 16.5 kV, 60 Hz and at reduced voltage with a frequency of 30 kHz, 50 kHz and 100 kHz
RE: jumper sizing for TRV capacitor application
For transmission level voltages, e.g. >=46 kV, the suppliers are Trench and AREVA...basically a CCVT without the voltage transformer portion.
RE: jumper sizing for TRV capacitor application