Use a multimeter and a megohmmeter to check whether the reverse conduction thyristor is good or bad

Use a multimeter and a megohmmeter to check whether the reverse conduction thyristor is good or bad

Use a multimeter and a megohmmeter to check whether the reverse conduction thyristor is good or bad. The test content is mainly divided into three items:

1. check retrograde

Select the R×1 range of the multimeter, connect the black test lead to the K pole, and the red test lead to the A pole. The resistance value should be 5~10Ω. If the resistance is zero, it proves that the internal diode is short-circuited; if the resistance is infinite, it means that the diode is open.

2. Measure the forward DC breakover voltage V(BO)

After connecting the circuit, shake the megohmmeter at the rated speed to make the RCT break down in the forward direction, and read the V (BO) value from the DC voltmeter.

3. Check trigger capability