High Voltage Breakdown Testing Procedure

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 breakdown testing procedure.

The resistor is rated with as many. By contrast the point of withstand voltage testing is to check dielectric strength to see whether an insulation breakdown will occur. The test is usually performed at about 75 of the typical breakdown voltage and is done as a safety net. The test is sensitive to arcs or corona so it often finds terminal spacing problems over mold problems tolerance errors in idc cables or any problem that might produce arcs.

It can also be used on a random sample basis to verify that the maximum voltage is not changing. The test is a means to qualify a device s ability to operate safely during rated electrical conditions. At the end of the one minute test switch the hipot tester from the high potential test mode to the voltage measuring mode to confirm that the circuit phase conductor and voltage of hipot tester are now reading zero volts. Designs and manufactures industry leading high voltage test equipment for proof testing diagnostic testing high voltage breakdown testing and preventative maintenance testing.

High voltage is applied across a specimen of insulation or equipment under test by means of a high voltage transformer. The test involves placing an extra high voltage across the insulation barrier of the device for one minute. If the insulation holds the voltage the device is deemed to have passed the test. The transformer oil is filled in the vessel of the testing device.

This test procedure covers the general high voltage tests required for the high voltage high power alternating current generator described as one of the selected power sources in u s. The lower the resulting breakdown voltage the poorer the quality of the transformer oil. Dielectric breakdown testing may be required during the development of assemblies used in critical applications. Trusted for the most technically advanced portable and user friendly high voltage equipment on the market.

Breakdown voltage testing procedure. However if the applied voltage leads to the sudden breakdown of the insulation material and allows current to flow the insulation is determined to be. It helps establish the maximum voltage of the design. Dielectric breakdown testing is used in product design and qualification stages.

Specifications and test procedures. A resistor is connected with series with the transformer to limit the short circuit current in the event of breakdown occurred in the device under test. Whereas most withstand voltage testing is carried out with an ac current insulation resistance testing which measures only the resistance component uses a dc current. The testing procedure is very simple.