1. When the load is resistive load, the voltage regulator's current should be no less than 3 times rated load current.

2. When the load is an AC motor, the voltage regulator's current should be no less than 5-6 times rated motor current.

3. When the load is electromagnet or inductance coils, the voltage regulator's current should be no less than 4 times rated load current.

4. When the load capacitive load, the voltage regulator's current should be no less than 5 times rated load current.

5. When the load transformer, the voltage regulator's current should be no less than 5 times rated current of the transformer primary.

Special inductive, capacitive load should be based on the actual situation, enlarge the current margin of voltage regulator.