Daihen OTC Welbee Inverter W400, Owner'S Manual

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I
NSULATION
R
ESISTANCE
M
EASUREMENT AND
W
ITHSTAND
V
OLTAGE
T
EST
M
AINTENANCE AND
I
NSPECTION
C
HAPTER
8
8-6
– Short-circuit the positive (+) and the negative ( - ) sides of the output terminal.
– Unground all the case grounding cables (line No.80, total of 6 positions) and insulate them with
insulation tape.
– For DR1, short-circuit the AC side and positive (+) output side and the AC side and negative ( - )
output side respectively.
– For DR2, short-circuit between the anode and the cathode.
– For DR6, short-circuit between the anode and the cathode.
– Short-circuit between TR1 (C1) and (E1C2), TR2(C2E1)-(E2), TR3(C1)-(C2E1), TR4(C2E1)-(E2).
– Short-circuit between TR5 (C1) - (E1C2), and TR5 (E1C2) - TR5 (E2).
– Short-circuit both ends of L2.
– Apply NF.
– After finishing insulation resistance measurement, return the above to the original state.
• After finishing insulation resistance measurement, it is necessary to remove the
shortcircuit cables and return the welding power source to the original state.
If the power is turned on without returning it to the original state, the welding power
source will burn out.