Testing

Generally, we only pay attention to the appearance of power adapter and whether it can make equipment work normally. We hardly take care of others. However, for power adapter, how can we judge whether it is qualified or unqualified? How do we test its safety capability? What are the test standards and test items for adapters? Here is some detailed information.

Common Definition

Adaptor

Power adapter is a device equipped with a transformer and an electronic circuit, which convert electrical power into single or multiple power outputs. It also provide power for Class III equipment (includes charging for built-in battery) to make them work normally.

Battery Charger

Electronic device used for battery charging.

Isolation Transformer

Transformer with protective isolation that is between input winding and output winding.

Safety Isolation Transformer

It is isolation transformer which provides SELV (Safety Extra Low Voltage) or PELV (Protection Extra Low Voltage).

Safety Extra Low Voltage (SELV)

Ultra-low voltage of a circuit that uses a device like safety isolation transformer to isolate from the grid power supply

Test Standards

 Test items