Kempact 253, 323; Primary Rectifier, V1 - Kemppi Kempact 253R Service Manual

8.2. Kempact 253, 323

8.2.1. Primary rectifier, V1

Primary side primary rectifier diodes can be measured one at the time
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Diodes must be measured both forward bias and reverse bias condition to make sure they are fine
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Check the diodes using the multimeter diode function to measure their threshold voltage 0,3...0,6 V
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Measurings:
1) Positive test pole to DC-link (-), negative test pole to L1, L2, L3 (one at the time)
Result: 0,3...0,6 diodes Ok
2) Positive test pole to DC-link (+), negative test pole L1, L2, L3 (one at the time)
Result: no value diodes Ok
3) Negative test pole to DC-link (+), positive test pole L1, L2, L3 (one at the time)
Result: 0,3...0,6 diodes Ok
4) Negative test pole to DC-link (-), positive test pole L1, L2, L3 (one at the time)
Result: no value diodes Ok
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SERVICE MANUAL
KEMPACT RA_V_1.2
V1
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V2