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EATON CORPORATION www.eaton.com
Instruction Leaflet IL 33-LGH-3
Effective September 2010
Digitrip Retrofit System for the ITE
LG-3000 (Frameless) Circuit Breaker
C. Cut the HV Wires to the appropriate length for
attachment to the appropriate top Breaker
Stabs. Strip .250" from each HV Wire and
attach a .250" ring terminal.
D. Using the existing hardware that secures the
Finger Clusters to the top Breaker Stabs,
connect the HV Wires to the Phase 1 & 2 or
Phase 2 & 3 Breaker Stabs.
E. Remove the External Harness plug installed in
the Trip Unit. Insert the black plug of the CPT
Harness into the same receptacle in the Trip
Unit. Reinsert the External Harness Plug just
removed into the female receptacle on the CPT
Harness.
Step 12: Testing the Breaker
A. Measure the force necessary to trip the
Breaker at the point where the Trip Shaft
contacts the Trip Finger on the DTA. The force
necessary to trip the Breaker
MUST NOT
EXCEED THREE (3) lbs
.
B. The Retrofit must be tested using primary
injection. Refer to Section 8 of the Instructions
for the Application of Digitrip RMS Retrofit
Kits on Power Circuit Breakers (Publication
AD 33-855), supplied with the Retrofit Kit, for
detailed testing procedures and specifications.
For test information specific to the Trip Unit,
refer to the IL publication supplied with the
Retrofit kit (see the Pick List for the
IL number).
C. While Section 8 of the Instructions for the
Application of Digitrip RMS Retrofit Kits on
Power Circuit Breakers provides the information
necessary for testing the Breaker, please keep
the following notes in mind when reviewing
other sections of the publication.
CAUTION: When all testing is complete, the Trip
Unit must be reset. Failure to do so may cause
the battery in the Rating plug to run down.
Notes:
1. Publication AD 33-855-1 was created
specifically for the “hundred” series (500, 600,
700, etc.) Retrofit Kits. Therefore certain
sections and figures do not apply to the “ten”
series (510, 610, 810, etc.) Retrofit Kits.
Specifically, these are Sections 13 and 14, as
well as Figures 3-2, 3-3, and 3-4.
2.
For All Kits Other Than 510 Basic. If testing the
Breaker with Short Delay or Ground Fault
functions, be sure to either plug in the Cell
Harness Assembly or use the Zone Interlock
Shorting Plug. Failure to do so may result in
shorter than expected trip times.
