5
Instruction Leaflet
IL29C614F
Effective December 2011
Instructions for The Digitrip RMS 310 3-Pole and
4-Pole Trip Unit Installation and Operation with
K-Frame Series C Circuit Breakers
EATON CORPORATION
www.eaton.com
Plug the current sensor secondary winding connector
into the receptacle in the side of the trip unit. Either
polarity is acceptable.
Position the retaining screws in the trip unit and current
sensor conductor holes.
Place the barrier with the notch between the trip unit
and the current sensor. The notch must fit around the
secondary winding connector.
Position trip unit together with the barrier and current
sensor in the circuit breaker (see Figure
6
). Make sure
latch bracket pin is properly seated in slots in side
plates. If necessary, latch may be moved toward load
end of circuit breaker to seat trip unit.
DO NOT EXCEED A TORQUE OF 6 TO 8 LB.-FT (8
TO 10 N.M). EXCESSIVE TORQUING WILL SHEAR
SCREWS.
FAILURE TO APPLY THE REQUIRED TORQUE MAY
LEAD TO EXCESSIVE HEATING AND CAUSE NUI-
SANCE TRIPPING OF THE CIRCUIT BREAKER.
Screw in and tighten three trip unit retaining screws
(center first) and the screw for the current sensor in the
fourth pole. Torque to 6 to 8 lb.-ft (8 to 10 N.m) (see
Figure
6
).
Install accessory(ies), if required, using appropriate
instruction leaflet listed in Section 8.2.
!
CAUTION
Figure 4 Scored Tab in Barrier.
Bend Tab
at Scored Line
and Break Out
Notch Is
Positioned
Towards Load
End of Circuit
Breaker and
Is Closer to
Base than Cover
Figure 5 Preliminary Alignment of Trip Unit with Rating
Plug and Current Sensor.
Retaining Screw
(3 Places)
Trip Unit
Secondary
Winding
Connector
Barrier
Current Sensor
Retaining Screw
Figure 6 Trip Unit with Rating Plug Installed in Circuit
Breaker.
Latch Bracket
Pin
Barrier
Secondary
Winding
Connector
Side
Plate
Trip Unit
and Current
Sensor
Retaining
Screws
Fourth
Pole
Current
Sensor
Latch
Side
Plate
Trip Unit
Retaining
Screws
Trip Unit
Line End
Load End
