The high voltage field tests (HIPOT Test) is a nondestructive test that determines the adequacy of electrical insulation for the normally occurring over voltage transient. This is a high-voltage test that is applied to all devices for a specific time in order to ensure that the insulation is not marginal.
High voltage field tests are helpful in finding nicked or crushed insulation, stray wire strands or braided shielding, conductive or corrosive contaminants around the conductors, terminal spacing problems, and tolerance errors in cables. Inadequate creep-age and clearance distances introduced during the manufacturing process.
We use VIDAR from Megger, Sweden.,Vacuum Interrupter Tester for HIPOT Tests.
- Following are the Features of VIDAR
- Tests the integrity of vacuum interrupters quickly, safely and easily.
- User defined voltage selection.
- Extensive voltage range.
- Easy to operate. Follows ANSI/IEEE standardized DC test methods.
- Lightweight and portable.
When a vacuum circuit breaker is commissioned or undergoes routine tests, it is very important to be able to ascertain whether or not the Vacuum Interrupter (VI) is intact before putting it back into operation.
VIDAR enables us to check the integrity of the vacuum interrupter quickly and conveniently by means of the known relationship between the flashover voltage and the vacuum interrupter. A suitable test voltage (DC) is applied to the breaker, and the result is known immediately.
VIDAR permits you to select among test voltages from 10 to 60 kV DC. One of these voltages is customized and specified by the customer when ordering. A green lamp indicates approval of the VI. A red lamp indicates that it is defective. Two-hand control and a high-voltage warning lamp enhances safety.
VIDAR has been developed in close collaboration with leading manufacturers of vacuum circuit breakers. It weighs only about 6 kg (15 lbs). It is easy to use since interrupters do not have to be dismounted for testing. VIDAR is therefore ideal for use in the field or shop floor applications.