USG-400
Safety check 6-2 ISSUE1
1 Check procedures
1-1 Grounding Resistance confirmation
○ Criteria
The resistance between an accessible metal part of the USG-400 and the grounding
terminal of the meet must be 0.1Ω or less.
○ Inspection procedures
(1) Measure the resistance value between the inlet grounding terminal the exterior chassis
screw farthest from the inlet to apply 25A (non-loaded condition : 6A or less) for five to ten
seconds.
1-2 Ground leakage current confirmation
○ Criteria
The ground leakage current must not be over the value at the table 1-5.
○ Inspection procedures
(1) Make measurements at the grounding terminal of the inlet.
1-3 Enclosure leakage current confirmation
○ Criteria
The enclosure leakage current must not be over the value at the table 1-5.
○ Inspection procedures
(1) Make measurement at the exterior chassis screw farthest from the inlet.
Inlet grounding terminal
USG-400
Chassis screw
Chassis screw
Chassis screw
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