Explain each of the following tests done on an electrical machine: (i) insulation resistance test: (ii)continuity test. (6 marks)June/July 2020

(i) Insulation resistance test:

An insulation resistance test is a diagnostic test that measures the electrical resistance of the insulation in an electrical machine, such as a transformer or motor. The test is performed by applying a high voltage across the insulation and measuring the resulting current flow. The resistance of the insulation is then calculated based on the voltage and current measurements.

The insulation resistance test is used to determine the quality and condition of the insulation in the electrical machine. A high insulation resistance indicates that the insulation is in good condition, while a low insulation resistance may indicate that the insulation is damaged or degraded.

(ii) Continuity test:

A continuity test is a diagnostic test that is used to determine whether an electrical circuit is complete and functioning properly. The test is performed by applying a low voltage across the circuit and measuring the resulting current flow. If the current flow is present, it indicates that the circuit is complete and functioning properly.

The continuity test is used to identify faults in an electrical circuit, such as open circuits or short circuits. It is often used to troubleshoot electrical systems and equipment, and to verify that the circuit is functioning as intended.