Work principle and performance:

    “A, B” are input terminals with the range of input voltage of 165V-265V.  The capacity of contact is 250V and that of contact A is 250V~, 1A, “1, 2” are output terminals.

When “A,B” terminals are connected with normal working voltage and the load current is less the 1.05 times of nominal action current , “1,2”are in close state;

When the load current is larger then 1.25 times of nominal action current and maintains for2-6 seconds, “1, 2”are opened until the load current is reduced under the nominal action current for 5 seconds, “1, 2”shall be closed again.

Insulation Resistance:

    Under normal temperature and humidity, the insulation resistance between the terminal and the body shall be≥100MΩ

Electrical temperature:

   Under normal temperature and humidity, the temperature between the carriers and the body shall be 1500V, 50 Hz