Different testing standards apply to different protection solutions. There are several principles for circuit protection.

1、protect equipments and devices away from damage and make sure person safe.

2、Principle of reliability: meet customers’ testing requirements.

3、Principle of usability: keep the customers’ equipments or devices work well.

4、Principle of economy: meet the customers’ requirements by choosing the high performance price ratio components.

5、Principle of classification protection: decide whether to carry out classification protection according to the application environments.