Precautions For Withstand Voltage Test And Insulation Resistance Measurement - Panasonic YC-300BZ3YHD Operating Instructions Manual

Maintenance and inspection

10.3 Precautions for withstand voltage test and insulation resistance measurement

This product uses semiconductor components such as
transistor. Executing withstand voltage test or insulation
resistance measurement casually may cause serious phys-
ical injury or mechanical failure. In case of necessity, con-
tact our sales distributors or Panasonic representatives.

Attention of sales distributors / Panasonic representatives
Prior to conducting withstand voltage test and insulation
resistance test, prepare the followings and also connect
ground wire (cross section: about 1.25 mm
Area
Input power cable
Output terminal of
welding power source
Connecting connector
Ground wire for case
Main circuit
Fan
Control circuit
After completion of the test(s) and prior to re-installing the case or cover, do the followings without fail.
• Remove all conductor cables for short-circuit.
• Reconnect all cables, connectors and ground wires that have been disconnected before the tests to the origi-
Note
nal condition.
Make sure to conduct the above. If the power has been turned on without removing the conductor cables for the
test, the equipment may be burnt.
46
2
).
Draw out the input power cable from the power box, and short the connecting terminals of the
cable.
Disconnect the cables connected to the output terminal except one for welding main circuit, and
then short-circuit the output terminals with conductor cable.
Disconnect all connecting cables and signal wires for external devices from jig terminal, welding
torch, wire feeder connector, communication connector and so on.
Disconnect all ground wires inside of the case connected to the case.
Short-circuit between the emitter and collector of the main transistor IGBT, and between anode
and cathode of the first diode and the secondary diode with conductor cable.
Disconnect all fun wires
Disconnect all connectors connected to the P.C. Board.
Operation
OMCTT5621E18