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Insulation Resistance Measurements

High results in insulation, or insulation resistance measurements, indicate good insulation of the measured location or equipment. The insulation value should not be less than the value obtained by multiplying the applied voltage to a thousand ohms to measure the insulation resistance. If the insulation value is low, it is not possible to mention that the electrical installation is healthy. Necessary measures must be taken.

If the insulation resistance in an electrical installation falls below the standards, the system must never be supplied with electricity. In this case, people's life and property safety is compromised.

The basic principle is that in a plant, the sections under electricity and the sections under non-electricity must be isolated from each other in order to ensure that the facility is reliable and sustainable. In addition, all electrical and electronic equipment must be fully insulated.

Insulation resistance measurement, that is, insulation tests, is based on the application of direct current to an electrically impermeable material and the measurement of the electrical current it passes through. Resistance value is then calculated according to Ohm's Law based on the measured current and voltage values.

Insulation tests must be performed on the insulator parts of transformers, cables and electrical devices, electric motors and generators. The higher the insulation value, the higher the security of the installation. If the insulation value is low, these installations or devices should never be used.

Especially in electric motors, if the insulation resistance is low, these motors will overheat and cannot be operated safely. If the motor is continued to be used, the life of the motor will be shortened and may cause electrical accidents. Insulation resistance is measured using Megger devices. To find the insulation resistance of an electric motor, the resistance between the windings of the motor and ground is measured.

If the insulation resistance value is 2 megaohm and lower, the insulation of the motor is very poor. This value is critical between 2-5 megaohm, normal between 5-10 megaohm, good between 10-50 megaohm, very good between 50-100 megaohm and excellent on 100 megaohm.

Our company, within the framework of electrical safety examinationsperforms insulation (insulation) resistance measurements in accordance with the relevant regulations, standards and test methods published by domestic and foreign organizations.