To remove the rating plug from the trip unit, open the
small rating plug door located on the right side of the trip
unit (Figure 6-6). The trip unit’s battery cavity is also
located behind this door. Use a 1/8” wide screwdriver to
remove the M4 screw holding the rating plug in position.
Pull the door to release the rating plug from the trip unit.
Instruction Book
Page 64
Effective: May 2006
I.B. 2C12060H08
For more information visit: www.EatonElectrical.com
6-5 CIRCUIT BREAKER MODIFICATIONS AND
CHANGES
The topics discussed here will relate to those actions
that can be taken in the field to change, update, main-
tain or repair a Magnum circuit breaker. This informa-
tion does not, however, include most accessory
devices. Their installation is covered by separate
instruction leaflets dedicated to the individual devices.
The tasks described here do not, under ordinary circum-
stances, require any assistance beyond the appropriate
instructional material. If further assistance is required,
however, contact your Cutler-Hammer representative.
6-5.1 RATING PLUG REPLACEMENT
If a rating plug is not installed in the trip unit, the
trip unit will trip when energized. Also remember
that the trip unit’s rating plug and the circuit break-
er’s current sensors must have matching ratings.
Figure 6-6 Trip Unit Rating Plug Location
Rating
Plug
Rating
Plug
NOTICE
Contact Wear Indicator - Contacts
Closed and in Good Condition
Contact Wear
Inspection Area
Contact Wear
Inspection Area
(Ledge Now Becoming
Visible Under
Contacts)
Contact Wear Indicator - Contacts
Closed and Wear is Indicated
Contact Wear
Inspection Area
Contact Wear
Inspection Area
(Ledge Not Visible
Under Contacts)
Side-to-Side
Ledge
Side-to-Side
Ledge
Figure 6-5 Use of Contact Wear Indicator with Circuit Breaker Closed
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