It is done with a state of art continuously variable high voltage testing set hipot capable of producing 0 120 kv dc output voltage.
High voltage cable hipot testing.
Experiments and research have shown that these over voltages can be as high as 1000 v.
Hipot testing we provide services of dc high voltage proof testing of hv cables and switchgears up to 120 kv.
Designed to verify that the insulation of a product is adequate enough to withstand high voltage.
The responsible safety officer should be consulted regarding the equipment and the appropriate personnel protection requirements.
Dc hipot testing measures the insulation resistance of cables by applying high voltage and measuring leakage current and the resistance is calculated using ohm s law.
As per iec 60950 the basic test voltage for hipot test is the 2x operating voltage 1000 v the reason for using 1000 v as part of the basic formula is that the insulation in any product can be subjected to normal day to day transient over voltages.
If the continuity test fails the test is finished as there is no need to hipot a bad cable.
Designs and manufactures industry leading high voltage test equipment for proof testing diagnostic testing high voltage breakdown testing and preventative maintenance testing.
Hipot test is the most common type of electrical safety test.
Trusted for the most technically advanced portable and user friendly high voltage equipment on the market.
Step by step high voltage test sequence.
Net 2 red j1 2 j1 3 is charged while all others are held at 0 volts ground.
Performed by stressing the insulation of the product far.
The test voltage values for dc hi pot tests are based upon final factory test voltage which is determined by the type and thickness of insulation the size of conductors the.
High potential hi pot dc testing guidelines for medium voltage cables photo credit.
Different test standards apply for consumer electronics military electrical devices high voltage cables switchgear and other apparatus.
The hipot test the dielectric voltage withstand test is commonly known as the hipot test.
To hipot test a net you connect all of the contacts in the net to high voltage and connect all other contacts in the device to ground.
Net 1 green j1 1 j1 4 j2 1 is charged to high voltage while all other nets are tied together and held at 0 volts ground.
Thus it is quite natural for utilities to also use withstand and partial discharge tests as commissioning and maintenance tests for cable.
