AC testing
AC testing
(OP)
Dear all experts,
I heard that the present equipment used to perform AC testing for power cable (132kV or 400kV) have a specified capacitance tolerance such as 40pF. Why AC testing is not preferable for LONG cable length?
Thank you!
I heard that the present equipment used to perform AC testing for power cable (132kV or 400kV) have a specified capacitance tolerance such as 40pF. Why AC testing is not preferable for LONG cable length?
Thank you!






RE: AC testing
RE: AC testing
HV testing using AC power supplies requires that the kit shall have enough kVA capacity to supply the cable capacitance charging currents. These currents are directly proportional to the length of the cable and also on the pu capacitance (which indirectly depends on the voltage rating) of the cable. This imposes restrictions on the test.
In other words, higher the voltage rating of the cable / longer the cable we need to go in for bigger size test equipment.