Overheat Protection - Kemppi Master S 400 Service Manual

Service manual Master S 400 and 500
IGBT diode
IGBT 1
IGBT 2
IGBT 3
IGBT 4
IGBT 1
IGBT 2
IGBT 3
IGBT 4

4.1.1.3. Overheat protection

IGBT module has NTC for protecting it from overheating. Thermistor is integrated inside the module.
1
NTC1
NTC2
NTC test leads
22 degrees of Between the test points (NTC-
Celsius ground) in resistance function
16
Kemppi Oy
Version 1.1
Positive test lead
Output 1
Output 2
Ground
Ground
DC-link positive
DC-link positive
Output 1
Output 2
NTC1
NTC2
Result
23kOhm
Negative test lead Result
DC-link positive 0,2-0,7VDC
DC-link positive 0,2-0,7VDC
Output 1 0,2-0,7VDC
Output 2 0,2-0,7VDC
Output 1 OL
Output 2 OL
Ground OL
Ground OL
5.9.2014