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ETSNZ - Is an external 24V DC power supply required for an NSX Micrologic 5/6 trip unit display

No, measurements will display when current flows through the circuit breaker (15 - 50A depending on the trip unit rating)
The minimum value required is displayed above the green "Ready" indicator on the trip unit.
There is provision for a 24V DC power supply to keep display permanently active if required.

 
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