ABB ACS 501 Installation & Start-Up Manual page 60

Resistance Test
ACS 501 Installation & Start-up Manual
Figure 6-2 Negative Rectifier Test
9. Measure between the positive and negative rectifier terminals. The meter
should register infinity with the test probes positioned one way, and
approximately 0.8 when the test probe positions are switched.
10. If your readings differ from the values in Steps 7 – 9, replace the
Rectifier Module.
1. Follow Diode Test Steps 1 – 5, above.
2. Set your multimeter to test resistance. If your multimeter has a diode test
function, disregard the Resistance Test and continue with Diode Test
Steps 6 – 10 above.
3. Measure the rectifier as in Diode Test Steps 7 – 10 above. The meter
should register a range from 100 to 10,000 ohms and infinity,
accordingly.
4. Connect the multimeter positive test probe to the rectifier negative
terminal and measure each rectifier phase pole with the multimeter
negative test probe. The meter should register a range from 100 to 10,000
ohms and infinity, accordingly.
Chapter 6 – Service and Maintenance
6-5