WEE Technology Co.,Ltd. » Bridge Rectifiers WEET » WEET Flat and Square Bridge Rectifiers 6A 10A 35A 50A 1000V KBPC5010 BR5010 GBPC3510 BR3510 GBU1010

WEET Flat and Square Bridge Rectifiers 6A 10A 35A 50A 1000V KBPC5010 BR5010 GBPC3510 BR3510 GBU1010

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How to test the bridge rectifier in a simple way?

Commonly used bridge rectifier detection methods

1, Static Test
(1) Test the rectifier circuit to find the P and N terminals of the internal DC power supply of the inverter, adjust the multimeter to resistance X10, connect the red meter to P, and the black meter to R, S, and T respectively. There should be approximately Resistance value of tens of ohms, and basically balanced.

On the contrary, connect the black meter rod to the P terminal, and the red meter rod to R, S, and T in turn, with a resistance value close to infinity. Connect the red meter stick to the N terminal and repeat the above steps, you should get the same result.

If there are the following results, it can be determined that the circuit has been abnormal, A. The resistance of the three-phase imbalance, can indicate the rectifier bridge failure. B. When the red meter rod is connected to the P terminal, the resistance is infinite, and it can be concluded that the rectifier bridge is faulty or the starting resistance is faulty.

(2) To test the inverter circuit, connect the red meter rod to the P terminal, and the black meter rod to U, V, W respectively. There should be a resistance value of several tens of ohms, and the resistance value of each phase is basically the same, and the reverse phase should be gigantic. Connect the black meter rod to the N terminal and repeat the above steps to get the same result, otherwise it can be determined that the inverter module is faulty

2, Dynamic Test
After the static test result is normal, the dynamic test can be performed, that is, power on and test the machine.

The following points must be paid attention to before and after power-on: 1. Before power-on, confirm whether the input voltage is wrong. Connecting the 380V power supply to the 220V-class inverter will cause explosions (fried capacitors, varistors, modules, etc.) . 2. Check whether each broadcast port of the inverter is properly connected, and whether the connection is loose. Abnormal connection may sometimes cause the inverter to malfunction, and in severe cases, it may explode.

3. Check the fault display content after power-on, and preliminarily determine the fault and cause.

4. If no fault is displayed, first check whether the parameters are abnormal, and after resetting the parameters, start the inverter under no-load (no motor connection), and test the U, V, and W three-phase output voltage values.

If there is a lack of phase, three-phase unbalance, etc., the module or drive board is faulty. 5. When the output voltage is normal (no lack of phase, three-phase balance), load test. When testing, it is best to test at full load.

WEET produce and supply the most popular Flat and Square Bridge Rectifiers, contact us to get more solutions of procurement, test, development.
50A 1000V: KBPC5010 BR5010 GBJ5010
35A 1000V: GBPC3510 BR3510
10A 1000V: GBU1010 GBJ1010
6A 1000V: GBU610
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Written by WEE Technology Company Limited