Kemppi Minarc Evo 150 Service Manual

Service manual Minarc Evo 150 and 180
Version 1.3
30.9.2015
19
Kemppi Oy
Diode group
Positive test lead
Negative test lead
Result
Series diodes forward bias
PFC input
DC-link positive
0,2-0,5VDC
IGBT diodes reverse bias
PFC input
GND
No value
Series diodes reverse bias
DC-link positive
PFC input
No value
IGBT diodes forward bias
GND
PFC input
0,3-0,7VDC
4.3.1.2. IGBT
Mains supply voltage must not be connected during the IGBT module diode measuring.
IGBT module can be tested by a multimeter when using the diode tester function. The module holds four
diodes and if IGBT is damaged, in many cases these will be defective. They can be measured only in
pairs if main transformer primary is connected, if it is removed all the four diodes can be measured
separately.
GND
PFC input
DC-link

Kemppi Minarc Evo 150 Specifications

General

Brand	Kemppi
Model	Minarc Evo 150
Category	Welding System
Language	English