Electrical Test - ESAB Aristo Mig 3001i Service Manual

Electrical test

1. Disconnect the welding power source from the mains supply.
2. Check continuity of the protective circuit.
Measure the resistance of the protective circuit from the screw (1) to
the protective earth connection in the the mains plug (2).
During the measurement the cable shall be bent, flexed and twisted
along the whole length in order to detect interuptions in the
protective conductor.
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Required value for cables up to 5 m, max 0.3 Ω.
3. Check the insulation resistance with an insulation tester with the
measurement voltage set to 500 VDC.
a. Turn the mains switch of the the welding power source to ON.
b. Measure from the supply pins in the mains plug (2) to the
welding outlets (3,4).
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Required value not less than 5 MΩ.
c. Measure from the welding outlets (3,4) to the protective earth connection in the
mains plug (2).
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Required value not less than 2.5 MΩ.
d. Measure from the supply pins in the mains plug (2) to the protective earth
connection in the mains plug (2).
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Required value not less than 2.5 MΩ.
e. Turn the mains switch of the the welding power source to OFF.
4. Check the no-load voltage.
Use the ESAB testbox TB 1. If the welding power source has an activated VRD function
then proceed to step 5.
a. Connect the positive (3) and negative (4) welding outlets to the positive and
negative terminals (DC
b. Connect a voltmeter to V
c. Connect the welding power source to the mains supply.
d. Turn the control knob of the TB 1 anti-clockwise to 0.2.
e. Turn the mains switch of the the welding power source to ON.
f. Set the welding power souce to MMA-welding.
g. Set the welding current control on the welding power souce to maximum.
h. Slowly turn the control knob of the TB 1 clockwise from 0.2 to 5.2 while checking
the voltmeter for the highest value.
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Measured value shall not exceed the allowable value 113 V
i. Turn the mains switch of the the welding power source to OFF.
j. Disconnect the welding power source from the mains supply.
5. Check of no-load voltage with the VRD activated.
Use the ESAB testbox TB 1. This test is only conducted when the VRD function is
activated.
a. Connect the positive (3) and negative (4) welding outlets to the positive and
negative terminals (DC
b. Connect a voltmeter to V
c. Connect the welding power source to the mains supply.
d. Turn the control knob of the TB 1 anti-clockwise to 0.2.
e. Turn the mains switch of the the welding power source to ON.
ca41_test
of the TB 1.
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of the TB 1.
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of the TB 1.
IN)
of the TB 1.
PEAK
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S0740 800 196/E101019/P76