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Can the amperage be changed on a Micrologic LX, LE, MX, ME, NX, NE, PX, or PE circuit breaker?

Issue:
Need to change the amperage or sensor on a legacy Micrologic electronic trip breaker

Product line:
Legacy Micrologic breakers

Resolution:
To change the amperage of a legacy Micrologic trip breaker, there are two options: 1) change out the rating plug or 2) adjust the long time pickup dial. For safety reasons, ONLY perform work and maintenance on de-energized equipment. There is a possibility of tripping the breaker during adjustments.

The rating plugs with their multiplier values are listed below. The multiplier is the factor to be applied to the sensor rating. Note that there is no restriction on interchanging the ARP rating plugs on LX, LE, MX, ME, NX, NE, PX or PE breakers.

PLEASE NOTE THAT THESE PLUGS ARE OBSOLETE WITH NO REPLACEMENT

Catalog #	Multiplier
ARP040	0.4
ARP050	0.5
ARP056	0.563
ARP058	0.583
ARP060	0.6
ARP063	0.625
ARP067	0.667
ARP070	0.7
ARP075	0.75
ARP080	0.8
ARP083	0.833
ARP088	0.875
ARP090	0.9
ARP100	1