Effective 7/1/2003
Page 6
I.L. 70C1037H04
CAUTION
DO NOT FORCE THE RATING PLUG INTO THE CAVITY.
Use a 1/8" (3 mm) wide screwdriver to tighten the M4 screw
and secure the plug and the trip unit to the circuit breaker
(See Figure 1.3).
Close the rating plug door.
CAUTION
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" (3 mm) WIDE
SCREWDRIVER BLADE IS ADEQUATE.
1.3.3 Trip Unit/Rating Plug Removal
To remove the rating plug from the trip unit, open the rating
plug door. Use a 1/8" (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 Figure 1.2).
Figure 1.2 Installation of the Digitrip Unit into a Magnum Breaker (Side View)
Figure 1.3 Installation of the Rating Plug and Mounting
Screw
(520M/MC option only)
Ground Alarm/Power
Supply Module
J3 (3 Point)
J4 (4 Point)
Connectors
Mounting Boss
Steel Mounting Plate
Guide Pin
Dimple
Pin 1
Connector K2
M-4 x 80mm
Mounting Screw
Pin 1
Connector K1
Rating Plug
(3 Pins)
0.045 Dia. Pins Exiting
Digitrip Housing
Spring Clip
Wires with
Connectors
Digitrip 220/520
Connector I1
(520MC only)
