How do I do current injection testing on the C441 Motor Insight?
The following is our recommendation.
- All three poles wired in series.
- Wire length should be 4 feet per pole.
- Single phase power supply
- Mount in normal position on vertical surface
- Test in area free of drafts
- Test with wire sized for the motor (current) application per the National Electrical Code.
- Make sure heater mounting & wire terminal screws are tight
- Allow 1 hour between tests
- Test at modest multiples of heater trip rating; 200% or 300%
- Test open at 25C ambient per the curves
- Power must be removed when relay operates to avoid damage