2
Instruction Leaflet
IL29C204I
Effective October 2011
Installation Instructions for Motor Operator for
3- and 4-Pole ND, NB, NC, MD, MA, MC Type
Circuit Breakers and Molded Case Switches
EATON CORPORATION
www.eaton.com
WARNING
CONTACT WITH ENERGIZED EQUIPMENT CAN
RESULT IN DEATH, SEVERE PERSONAL INJURY, OR
SUBSTANTIAL PROPERTY DAMAGE. DO NOT
NANCE ON EQUIPMENT WHILE IT IS ENERGIZED.
ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT
BEFORE PROCEEDING WITH THE TASK, AND
ALWAYS FOLLOW GENERALLY ACCEPTED SAFETY
PROCEDURES.
ATTEMPT TO INSTALL OR PERFORM MAINTE-
EATON IS NOT LIABLE FOR THE MISAPPLICATION
OR MISINSTALLATION OF ITS PRODUCTS.
The user is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of personnel
and equipment as well as all general and local health and
safety laws, codes, and procedures.
The recommendations and information contained herein
are based on Eaton experience and judgement, but should
not be considered to be all-inclusive or covering every
application or circumstance which may arise. If any ques-
instructions.
1.
INTRODUCTION
The motor operator (Fig. 1-1) allows the circuit breaker to
be opened, closed, or reset remotely. It has the capability
for lock-off, push-to-trip, and manual operation. Electrical
The motor operator mechanism is driven by a reversible
electric motor connected to a ball screw. The ball screw
drives the circuit breaker handle. Limit switches are used
to control the motor.
installed to gain access to the breaker’s cable terminals,
Fig. 2-3.
Fig. 1-1. Motor Operator Installed in ND Type Frame
Series C Circuit Breaker
2.
INSTALLATION
The motor operator is Underwriters Laboratories, Inc.
listed as a recognized component suitable for field instal-
lation on N-frame circuit breakers and molded case
switches under UL File E64124.
The motor operator is normally supplied as a separate
item for mounting on an uninstalled circuit breaker. If a
motor operator is to be mounted on an installed circuit
breaker, all power must be removed from the circuit
If the motor operator is to be installed on an OPTIM
breaker, an OPTIM Connector Kit, Catalog Number
be connected on the face of the operator. The kit
the trip unit port.
tions arise, contact Eaton for further information or
power to the motor is cut off when the cover is removed.
It is unnecessary to remove a motor operator once
OPEOPCK, should be ordered to allow the Optimizer to
includes a connector socket and an extension cable to
breaker before proceeding to mount the motor operator.
