Kemppi Master S 400 Service Manual

Service manual Master S 400 and 500
Version 1.1
5.9.2014
15
Kemppi Oy
Check the diodes using the multimeter diode function to measure their threshold voltage. Diodes must be
measured both forward bias and reverse bias condition to make sure they are ok. NTC is measured in
resistance mode. See following pictures and table to make all the necessary measurements.
IGBT module has 4 IGBTs and
each one of these has diode in
parallel. Module has also
integrated NTC thermistor for
overheat protection.
IGBT
IGBT module
Parallel
diode
Ground
Output 2
DC-link positive
1
2
Output 1
3
4

Kemppi Master S 400 Specifications

General

Brand	Kemppi
Model	Master S 400
Category	Welding System
Language	English