Operation Manual

MI 3310 / MI 3310A SigmaGT Measurements
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 For more information refer to chapter Measurements according to IEC/ EN
60974-4, paragraph Insulation resistance (welding circuit to protective circuit)
in 3-phase adapter user manual.
Result screens:
Examples of Insulation W-PE measurement results
Displayed results:
Main result ............. Insulation resistance W-PE
Note:
 Consider displayed warnings before starting measurement!
5.3.4 Insulation resistance (supply circuit to welding circuit)
The insulation resistance test checks the resistance between primary supply circuit and
the welding circuit (outputs) of the welding machine.
The instrument measures the insulation resistance between:
- mains test socket‘s live terminals and W1/ W2 terminals on 3-phase adapter
(A1422).
Insulation LN-W menu
Test parameters for insulation resistance LN-W measurement
OUTPUT Test voltage [500 V]
LIMIT
Minimum resistance [5.00 M, 10.0 M, none]
TIME Measuring time [2 s, 3 s, 5 s, 10 s, 30 s, 60 s, 120 s, 180 s, none]
Test circuit and measurement procedure for insulation resistance LN-W
measurement