2007-03-27 08:21:19 · 5 answers · asked by bobby m 1 in Science & Mathematics ➔ Engineering
"Pressure Testing" is another way of saying you are testing insulation integrity.
The voltage is applied between the conductor and ground, across the insulation.
The test is an overvoltage condition; in North America, it is commonly set at (2 * Rated Voltage + 1000), while in Britain it is generally set at (2.2 * Rated Voltage).
What you are looking for is if the high voltage stress sufficiently weakens the insulation integrity such that a ground fault can occur. Another common name for the test is a high potential test (HiPot).
2007-03-27 10:00:15 · answer #1 · answered by CanTexan 6 · 0⤊ 0⤋
Testing Of Cable
2016-12-18 12:38:07 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Normally u test at %50 to %100 above operating voltage.
2007-03-27 08:46:06 · answer #3 · answered by JOHNNIE B 7 · 0⤊ 0⤋
It's called HI-POT testing(high potential), and what you do is apply a very high voltage across a circuit(ie. primary of transformer) and monitor current leakage. If there is a relatively high(in the mA range) current leakage, then the insulative or isolation of the circuit is compromised and is deemed unsafe.
2007-03-29 01:49:31 · answer #4 · answered by joshnya68 4 · 0⤊ 0⤋
and it hurts when you disconect cables with out earthing too
2007-03-27 11:27:03 · answer #5 · answered by heartsave999 2 · 0⤊ 0⤋