Kemppi Kempact 253R Service Manual

Also see for KEMPACT 181A: Operating manual Quick guide

Kemppi Kempact 253R Service Manual Manual pdf 30 page image

SERVICE MANUALKEMPACT RA_V_1.229 (40)Kemppi Oy8. OPERATIONAL MEASURINGS AND TESTSNOTE !Main supply voltage must not be connected when making measuring operations. The component frame has to be uninstalledso that main components conditions can be measured.8.1. Kempact 181, 2518.1.1 Primary rectifier V24, 25• Primary side primary rectifier diodes can be measured one at the time• Diodes must be measured both forward bias and reverse bias condition to make sure they are fine• Check the diodes using the multimeter diode function to measure their threshold voltage 0,3…0,6 VMeasurings :1) Positive test pole to rectifier pole (1, red), negative test pole to rectifiers poles (1, black) one at timeResult: 0,3…0,6diodes Ok2) Negative test pole to rectifier pole (2, black), positive test pole to rectifier poles (2, red) one at the timeResult: no valuediodes Ok3) Negative test pole to rectifier pole (3, black), positive test pole rectifier poles (2, red)one at the timeResult: 0,3…0,6diodes Ok4) Positive pole to rectifier pole (4, red), negative test pole to rectifier poles (1, black) one at the timeResult: no valuediodes OkNOTE !The measurement procedure is same for V24 and V25 rectifiers.V24,25 V1