4
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
KES trip unit is required to provide protection of the
fourth pole of a 4-pole circuit breaker.
Trip Unit center retaining screw is supplied with the
trip unit; the remaining retaining screws (2 for a 3-
pole trip unit, 3 for a 4-pole trip unit) are supplied
with the circuit breaker frame.
Remove circuit breaker cover screws, and cover.
Remove conductor barriers from base (see Figure
2
).
If installing a 4-pole trip unit, remove conductor bar
from the right-hand (fourth) pole (Figure 2). Discard
the conductor but keep the retaining screw.
Make sure circuit breaker base conductors are posi-
tioned in slots in base (see Figure
3
).
Remove screws from shunt plate inserts (see Figure
3
).
The trip unit outer screws may be placed in the trip
unit conductor holes at this time. If preferred, a
magnetic screwdriver may be used to position the
screws when the trip unit is in the base.
Make sure shunt plates are centered over shunt
plate inserts (see Figure 3).
To continue installation, proceed to the section applica-
ble to the trip unit being installed:
Trip Unit Type
Section
4-pole Type Trip Unit
3.2
3-pole Ground Fault Trip Unit
3.3
3-pole Non-Ground Fault Trip Unit
3.4
3.2 4-POLE TRIP UNIT INSTALLATION
Remove barrier between the third and fourth (right-
hand) pole. Find the scored tab (Figure
4
) and break
away from the barrier to leave a square notch.
Place the trip unit and fourth pole current sensor side by
side on a flat surface (see Figure
5
).
Remove the CAUTION tag from the current sensor sec-
ondary winding leads.
Secondary winding connector is not polarized.
NOTICE
NOTICE
NOTICE
Figure 2 Conductor Barriers (4-pole Circuit Breaker
Frame Shown).
Circuit
Breaker
Base
Conductor
Barriers
Conductor
Barriers
Conductor
Bar
Load End (Cover Removed)
Figure 3 Base Conductors in Position and Shunt Plates
Centered Over Base Inserts.
Shunt
Plates
Base
Base
Conductors
Shunt
Plate
Inserts
