Index: WAADAHVVLFFE
VLF frequency extention: 0.05 Hz and 0.02 Hz
Description
Optional for product
- Description
Extension for the S-24 VLF / S-36 VLF / S-44 VLF / S-57 VLF tester to enable measurements with voltages of a frequency of 0.05 Hz and 0.02 Hz. The extension allows testing of cables with a longer length and higher total capacitance than allowed by the standard frequency of 0.1 Hz.
For example, for a test voltage of 44 kVRMS and a unit capacitance of the cable of 0.25 µF/km:
- the standard frequency of 0.1 Hz allows for testing a cable with a length of approx. 6.4 km and a capacitance of 1.6 µF,
- the non-standard frequency of 0.02 Hz allows for testing a cable with a length of approx. 25 km and a capacitance of 6.3 µF.
Frequency Number of full waveforms per minute Number of full waveforms per hour 0.1 Hz 6 360 0.05 Hz 3 180 0.02 Hz 1.2 72 - Optional for product
