The insulation resistance tester is suitable for insulation testing in the maintenance, repair, testing and verification of various electrical equipment. The insulation resistance index line is uniform and clear, which is convenient for accurate reading. The operation is simple and convenient to carry. Low power consumption, battery-powered, long use time. With battery capacity check function.

What happens when electrical insulation fails?

Electrical insulation is not just a plastic polymer material that wraps wires. It is a complete system consisting of cable insulation, bushing insulators, space in the conduit, motors and general equipment. Mechanical pressure, pollution, and temperature changes can cause these components to deteriorate over time and cause current leakage. Current leakage will cause the following problems:

1. When the current passes through the insulating layer, heat is generated, which will deteriorate the insulating layer until the insulation fails, and may cause a fire hazard.

2. Leakage current must return to the source, it will flow through any available conductors, conduits, pipes, water or earth to return to the source. This unfavorable current can generate dangerous voltages.

3. Leakage current is not efficient. The current leaking through the insulating layer cannot drive the motor, emit light, or heat, but still consumes.

4. Leakage current will cause the overcurrent protection device to trip and cause the motor and transformer to overheat. The result is that poor electrical insulation causes equipment failures and production line shutdowns. Now, no factory can withstand unplanned shutdowns. "Customers need to diagnose faults quickly. No one wants to lose production time, and many customers are eager to know if they need to repair the equipment or simply replace it."

The role of insulation resistance tester:

By testing the insulation resistance of different components in the system (transformers, switchgear, wires, motors), technicians can isolate and repair the faulty components. Technicians use tests to verify the high insulation resistance between wires and ground or adjacent wires. Two common examples are testing the insulation between the motor windings and the motor base, and checking the resistance between the phase conductor and the ground wire/cage. Before powering on the system, use the insulation test to verify that it is sound and can improve the performance of the system; the insulation test can find manufacturing process problems and equipment defects, which are generally not found before the equipment fails. In the European Union, this test is mandatory, even for civilian systems.