Hypot abbreviation is derived from the English High Potential meaning high potential. Hypot tests, or high voltage tests, are applied to measure dielectric resistance on high voltage and conduct isolation control. These tests are required for all kinds of high voltage electrical devices.

High-voltage (hypot) tests are performed to ensure that operation is safe and the integrity of high-voltage cable insulation in an electrical system is verified. These tests reveal weak components that could jeopardize short-circuit conditions or electrical safety and create a risk of electric shock to people.

The high voltage (hypot) tests only check the high voltage alternating current primary wiring of an electrical system. The method is quite simple. A very high voltage potential is applied between the phase and neutral cables and the main safety grounding point and the system is monitored. During this test, a properly wired and insulated electrical system must have a negligible current flow.

Electrical safety test equipment, often referred to as hypot test equipment, is an integral part of the production of electrical and electronic equipment. These testers produce high potential for conducting dielectric strength and insulation resistance tests.

In addition, many hypot testers perform low resistance measurements and provide low resistance / high current outputs to test ground resistance and earth bond integrity.

Electrical safety tests aim to identify faulty components or assembly errors for many electrical and electronic equipment, detect hidden area failures and meet labeling requirements, thus reducing warranty costs.

Here are a few standards that are based on high voltage (hypot) testing by competent authorities:

• TS EN 60060 High voltage test techniques

• TS EN 60076 Power transformers

• TS EN 60204 Safety in machinery - Electrical equipment of machines