High Voltage Hipot Test

A dielectric withstand test or pressure test high potential or hipot test is an electrical test performed on a component or product to determine the effectiveness of its insulation the test may be between mutually insulated sections of a part or energized parts and electrical ground.

High voltage hipot test.

The responsible safety officer should be consulted regarding the equipment and the appropriate personnel protection requirements. Such a test applies a voltage to the dut that is much higher than normal operating voltage. Hipot test is the most common type of electrical safety test. 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.

Performed by stressing the insulation of the product far. The test is a means to qualify a device s ability to operate safely during rated electrical conditions. The hipot test the dielectric voltage withstand test is commonly known as the hipot test. Designed to verify that the insulation of a product is adequate enough to withstand high voltage.

Typically 1000v ac plus twice the normal operating voltage. This formula calculates a test voltage 10 lower than the formula used in the standards. The formula for a hipot test is double the operating voltage plus 1 000v. 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.

High potential hi pot dc testing guidelines for medium voltage cables photo credit. Experiments and research have shown that these over voltages can be as high as 1000 v. For a 460v motor this difference is about 200v for a 4000v motor 945v and for a. Therefore the formula in the standards for dc hipot test voltage with used motors is as seen below.

The reason for the additional 1 000v is that insulation can be subjected to various surges in day to day usage and experiments have provided clear indications that these overvoltages can be as high as 1 000v.