Schneider Electric 3.0A User Manual

© 1999–2012 Schneider Electric All Rights Reserved

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Torque-controlled screwdriver, set at 7 in-lbs (0.8 N•m) ± 10% 
(Lindstrom torque driver MAL500-2 or equivalent)

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Micrologic Full-Function Test Kit (part number S33595)

Record all trip unit switch settings for later use.

Disconnect circuit breaker as directed in the circuit breaker instruction 
bulletin shipped with the circuit breaker. The circuit breaker must be 
completely isolated. (For a drawout circuit breaker, place circuit breaker in 
the disconnected position. For a fixed-mounted circuit breaker, all voltage 
sources, including auxiliary power, must be disconnected.)

Remove circuit breaker accessory cover as directed in the Install 
Accessories section of the circuit breaker instruction bulletin shipped with 
the circuit breaker.

Trip unit replacement must be done by qualified 
persons, as defined by the National Electric 
Code, who are familiar with the installation and 
maintenance of power circuit breakers.

Before replacing trip unit, confirm that the circuit 
breaker is in good working condition. If the 
condition of the circuit breaker is unknown, do 
not proceed. For assistance in evaluating the 
condition of the circuit breaker, call Technical 
Support.

Read this entire section before starting the 
replacement procedure.

NOTE: If trip unit being replaced is a Micrologic 
2.0, 3.0 or 5.0 trip unit, order connector block 
S33101 and circuit breaker or cradle wiring 
harness if necessary.

• Failure to follow these instructions for installation, trip test and primary 

injection testing may result in the failure of some or all protective function.

• Apply appropriate personal protective equipment (PPE) and follow safe 

electrical work practices. See NFPA 70E or CSA Z462.

• Replacement/upgrading of a trip unit in the field must be done by 

qualified persons, as defined by the National Electric Code, who are 
familiar with the installation and maintenance of power circuit breakers.

• Before replacing/upgrading trip unit, confirm that the circuit breaker is in 

good working condition. If the condition of the circuit breaker is unknown, 
do not proceed. For assistance in evaluating the condition of the circuit 
breaker, call Technical Support.

• If the circuit breaker fails to function properly in any manner upon 

completion of the trip unit installation, immediately remove the circuit 
breaker from service and call Field Services.

• Turn off all power supplying this equipment before working on or inside 

equipment. Follow instructions shipped with circuit breaker to disconnect 
and reconnect circuit breaker.

• Replace all devices, doors and covers before returning equipment to 

service.