Which method is used to check ohms of switchgear?

The method used to check ohms of switchgear is the 1000V megger. This tool is specifically designed for insulation testing and is particularly effective for high-voltage applications, making it suitable for evaluating the integrity of switchgear insulation. When measuring resistance, especially in electrical components like switchgear that handle high voltages, the megger applies a known voltage and measures the resulting current. This allows it to calculate the resistance or ohm value accurately.

In addition to its functionality, using a megger is essential for ensuring that the insulation within the switchgear is adequate to prevent any electrical faults or failures. This is vital for maintaining the reliability and safety of electrical systems.

While other instruments like a digital multimeter can measure resistance, they are typically not designed for high-voltage applications and may not provide the necessary range or accuracy for switchgear testing. Insulation testers are similar in concept, but they usually operate at lower voltages and may not be as effective for specific high-voltage applications. An oscilloscope, on the other hand, is used for analyzing signal waveforms rather than measuring resistance. Thus, the 1000V megger stands out as the most appropriate choice for checking the ohms of switchgear.