The watt-hour meter connector is a low-voltage component that operates for a long period of time at a specified temperature, and the heat dissipation is a critical qualification to its performance. The standard Q/GDW11008-2013 specifies that the temperature rise test is carried out in free air, and the test-qualified products installed in the watt-hour meter box often exceed the limit of 60K. This is because other heat-generating components in the box affect the test results. In order to make the temperature rise test of the connector in the free air more scientific, the installation into the set of working conditions does not affect the life of the connector due to heat dissipation. This paper mainly discusses a temperature rise equivalent conversion method.