Rated Current (A)

Test Procedure

Test Current

Initial State

Tripping or Non-tripping Time Limit

Expected Result

Remark

80A

100A

125A

A

1.05In

cold

t≤2h

No tripping

B

1.3In

After test A

t≤2h

tripping

The current steadly rises to the specified value within 5s

C

2.55In

cold

1s<t<120s

tripping

D

8In

cold

t≤0.2s

No tripping

Turn on the auxiliary switch to close the current

12In

t<0.2s