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Micrologic™ 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units 48049-136-05
Section 4—Trip Unit Replacement Rev. 01, 07/2012
© 1999–2012 Schneider Electric All Rights Reserved32-EN
ENGLISH
Trip Unit Installation Check
Trip Unit Setup
1. If an auxiliary power supply is being used for the Micrologic trip unit,
reconnect the auxiliary power supply.
2. Reset the trip unit switches to original values, as recorded at the
beginning of this section.
Circuit Breaker Reconnection Reconnect circuit breaker as directed in the circuit breaker instruction
bulletin shipped with the circuit breaker.
Secondary Injection Testing
Field installation of a trip unit requires secondary injection testing with the
Full-Function Test Kit. to ensure that the newly-installed trip unit is
functioning properly. The test will require opening and closing the circuit
breaker. Follow the procedures outlined in the instruction bulletins shipped
with the circuit breaker and the test kit.
1. Make sure the circuit breaker is isolated from all upstream and
downstream devices.
2. Perform secondary injection testing as outlined in the instruction bulletin
shipped with the test kit. Verify that all applicable trip unit functions are
operating properly.
3. Repeat step 2 with the circuit breaker in the open position.
NOTE: The test kit states that the circuit breaker should be closed when
performing the test. Do not close the circuit breaker for this step.
4. If any test fails, do not put the circuit breaker into service and contact the
local sales office for factory authorization service.
Primary Injection Testing
Primary injection testing is recommended to ensure that all trip system
connections have been correctly made. Perform primary injection testing
per the instructions in the Field Testing and Maintenance Guide, bulletin
number 0600IB1201.
Check Accessory Operation
1. Installed accessories – Validate the proper operation of all installed
accessories. See the corresponding accessory instruction bulletins for
operational testing procedures.
2. Zone selective interlocking – If the circuit breaker is part of a ZSI system,
follow the zone selective interlocking test procedures as outlined in the
Full Function Test Kit instruction bulletin.
3. Communications – If communication modules exist, validate circuit
breaker has re-established communications with the supervisor.