Dc Bus Voltage Measurement - Thermal Arc Fabricator 211i Service Manual

TROUBLESHOOTING

5.09 DC Bus Voltage Measurement

Apply voltage to the Power Source.
There are extremely dangerous voltage and power levels present inside these Power Sources. Do not
attempt to diagnose or repair unless you have had training in power electronics measurement and troubleshooting
techniques.
Once power is applied to the Power Source, there are extremely hazardous voltage and power levels present.
Do not touch any live parts.
Art # A-10750
DC Bus Testing
Upper capacitor bank
Lower capacitor bank
Overall capacitor bank
Note: These DC voltages are at nominal mains supply voltage of 240VAC/110VAC.
Manual 0-5158
Multimeter Lead Placement
Positive meter lead to testpoint 1
Negative meter lead to testpoint 2
Positive meter lead to testpoint 2
Negative meter lead to testpoint 3
Positive meter lead to testpoint 1
Negative meter lead to testpoint 3
Table 5-10 DC BUS, Multimeter set to measure DC volts
Voltage with Supply Voltage ON
5-9
FABRICATOR 211i
190 VDC +/-10%
190 VDC +/-10%
385 VDC +/-10%
TROUBLESHOOTING