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.
Net 2 red j1 2 j1 3 is charged while all others are held at 0 volts ground.
The responsible safety officer should be consulted regarding the equipment and the appropriate personnel protection requirements.
High potential hi pot dc testing guidelines for medium voltage cables photo credit.
The hipot test the dielectric voltage withstand test is commonly known as the hipot test.
Step by step high voltage test sequence.
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.
Experiments and research have shown that these over voltages can be as high as 1000 v.
High voltage withstand tests are used in conjunction with partial discharge measurements on solid dielectric cable and accessories within manufacturing plants to ensure the quality of completed cable system components from mv to ehv.
Thus it is quite natural for utilities to also use withstand and partial discharge tests as commissioning and maintenance tests for cable.
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2 typical hipot equipment leakage current trip limit settings range between 0 1 and 20 ma 3 and are set by the user according to test object characteristics and rate of voltage application.
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.
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.
For example if you have a wire that connects two pins the high voltage will be simultaneously apply to both of those pins and the entire wire will be raised in voltage.
Hipot test is the most common type of electrical safety test.
Different test standards apply for consumer electronics military electrical devices high voltage cables switchgear and other apparatus.
Designs and manufactures industry leading high voltage test equipment for proof testing diagnostic testing high voltage breakdown testing and preventative maintenance testing.
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.
Performed by stressing the insulation of the product far.
Designed to verify that the insulation of a product is adequate enough to withstand high voltage.
