What is the typical overpotential test voltage for equipment with a nominal voltage class of 600V?

The typical overpotential test voltage for equipment with a nominal voltage class of 600V is 2,000 VDC. This value is significant because it is used to test the insulation integrity of electrical equipment to ensure it can handle higher potential voltages than what it is rated for under normal operating conditions.

The 2,000 VDC level is set as a standard within the industry to provide a safety margin that verifies the insulation can withstand transient voltages and maintain effective operations without failure or breakdown. When conducting an overpotential test, applying this specific voltage ensures that any weaknesses in the insulation are identified before the equipment is put into service, helping to prevent electrical failures and enhancing safety.

Values that are significantly lower or higher such as 1,000 VDC, 1,500 VDC, or 2,500 VDC do not align with the established standards for overpotential testing of equipment rated at 600V, which is specifically designed with 2,000 VDC in mind to ensure reliability and safety.