Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?
Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?
(OP)
Is there an acceptable work around? if the manufacturer also claims that their PD TEST set cannot be used with VLF (0.1Hz) test sets and is designed for use with the power frequency (i.e. 50/60Hz) either on-line (in normal service condition) or off-line (via energisation from a transformer).
I understand that PD testing with VLF is quite difficult due to the requirement for a HV filter (to eliminate the noise) and specific software. For acceptance/commissioning testing often a VLF withstand (overvoltage) test is conducted off-line and then an on-line PD test is conducted directly after initial energisation and then on a 6-monthly or annual basis to trend the levels over time.
Is there a sufficient solution to OFF-LINE PD testing?
Thanks,
0neManRiot
I understand that PD testing with VLF is quite difficult due to the requirement for a HV filter (to eliminate the noise) and specific software. For acceptance/commissioning testing often a VLF withstand (overvoltage) test is conducted off-line and then an on-line PD test is conducted directly after initial energisation and then on a 6-monthly or annual basis to trend the levels over time.
Is there a sufficient solution to OFF-LINE PD testing?
Thanks,
0neManRiot






RE: Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?
NETA dosent say much either way, they just list the acceptable methods. PD, VLF, and TD are fairly new additions to the standard.
RE: Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?
When you speak of Tan Delta testing, Is this also referred to as Time Domain Reflectometer testing?
I am still trying to get a handle on the relative High Voltage test equipment and procedures.
RE: Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?
TDR injects a pulse with short duration and fast rise and fall times into a conductor, for example a cable or a winding, and then analyses the reflections from discontinuities in the conductor.
RE: Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?
RE: Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?
RE: Is it ok to perform an off-line PD test with a VLF Test set? If NETA/ANSI standards say it is OK?