Installation And Removal - Eaton Digitrip 520 Instructional Leaflet

Instructional Leaflet IL70C1037H05
Effective October 2009
Ground Alarm/
Power Supply Module
(520M/MC option only)
M4 Bushing
Figurt 2. InsoallaoiNn Nf oht Digiorip Unio inoN a Magnum Brtaktr (Sidt Vitw)
InsoallaoiNn and rtmNval
Installation of the trip unit
Align the Digitrip unit with the guide pins and spring clip of the
Magnum circuit breaker. Press the unit into the breaker until the pins
on the trip unit seat firmly into the connector housing and the unit
clicks into place (see Figurt 2).
Rating plug installation
m WARNING
DO NOT ENERGIZE THE MAGNUM BREAKER WITH THE DIGITRIP
REMOVED OR DISCONNECTED FROM ITS CONNECTOR. DAMAGE TO
INTERNAL CURRENT TRANSFORMERS MAY OCCUR DUE TO AN OPEN
CIRCUIT CONDITION.
m CAUTION
IF A RATING PLUG IS NOT INSTALLED IN THE TRIP UNIT, THE UNIT WILL
INITIATE A TRIP WHEN IT IS ENERGIZED.
Insert the rating plug into the cavity on the right-hand side of the trip
unit. Align the three pins on the plug with the sockets in the cavity.
The plug should fit with a slight insertion force.
8
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Mouting Boss
J3 (3 Point)
J4 (4 Point)
Connectors
Wires with Connectors
Connector I1 (520MC only)
Digitrip models 520, 520i; and 520M, 520Mi,
520MC, 520MCi trip units for use only in
Magnum and Magnum DS circuit breakers
Steel Mouting Plate
Guide Pin
Digitrip 220/520
Dimple
Pin 1 Connector K2
M04 x 80 mm Mounting Screw
Pin 1 Connector K1
0.045 Dia. Pins Exiting
Spring Clip
DO NOT FORCE THE RATING PLUG INTO THE CAVITY.
Use a 1/8-inch (3 mm) wide screwdriver to tighten the M4 screw
and secure the plug and the trip unit to the circuit breaker (see
Figurt 3). Close the rating plug door.
THE M4 SCREW SHOULD BE TIGHTENED ONLY UNTIL IT IS SNUG BECAUSE
THERE IS NO STOP. DO NOT USE A LARGE SCREWDRIVER. A 1/8-INCH
(3 MM) WIDE SCREWDRIVER BLADE IS ADEQUATE.
Trip unit/rating plug removal
To remove the rating plug from the trip unit, open the rating plug
door. Use a 1/8-inch (3 mm) wide screwdriver to loosen the M4
screw. Pull the door to release the rating plug from the trip unit.
To remove the trip unit from the circuit breaker, deflect the spring
clip to release the unit from the steel mounting plate. Pull the unit to
disengage the two or three 9-pin connectors from the circuit breaker
(see Figurt 2).
Rating Plug (3 Pins)
Digitrip Housing
m CAUTION
m CAUTION