Rockwell Automation 140U N-Frame CB Alarm Switch and Alarm Auxiliary Switch Combination - Manual

.
CONTACT WITH ENERGIZED EQUIPMENT CAN
RESULT IN DEATH, SEVERE PERSONAL INJURY,
OR SUBSTANTIAL PROPERTY DAMAGE. DO NOT
ATTEMPT TO INSTALL OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER-
GIZED. ALWAYS VERIFY THAT NO VOLTAGE IS
PRESENT BEFORE PROCEEDING WITH THE TASK,
AND ALWAYS FOLLOW GENERALLY ACCEPTED
SAFETY PROCEDURES.
ALLEN-BRADLEY IS NOT LIABLE FOR THE MIS-
APPLICATION OR MISINSTALLATION OF ITS
PRODUCTS.
The user is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of person-
nel 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
Allen-Bradley experience and judgement,
but should not be considered to be all-inclusive or
covering every application or circumstance which may
arise. If any questions arise, contact
Allen-Bradley for
further information or instructions.
1. INTRODUCTION
WARNING
Fig. 1-1. Alarm Switch Installed in N
-Frame Breaker
N-Frame Circuit Breaker
Installation Instructions for Alarm Switch and
Alarm Auxiliary Switch Combination
General Information
The alarm (signal)/lockout switch (ASL switch) (Fig. 1-1)
is attached to a plug-in module available in the following
combinations:
•
One or two ASL switches
•
One auxiliary switch and one ASL switch
•
Two auxiliary switches and one ASL switch
The plug-in module is mounted in slots in the top of the
trip unit and occupies the accessory mounting cavity in
the circuit breaker frame. The ASL switch provides
remote signaling and interlocking when the circuit break-
er trips; it consists of one or two single-pole, double-
throw (SPDT) switches. Each SPDT switch has a make
(alarm) and a break (lockout) contact; it is mounted so
that the switch actuator arm is controlled by the position
of the circuit breaker crossbar.
When the circuit breaker is in the ON or OFF position,
the crossbar allows the make contact to open and the
break contact to close. When the circuit breaker is in the
tripped position, the make contact is closed and the
break contact is open. Any type of trip operation (for
example, automatic trip, shunt trip, or undervoltage
release) actuates the ASL switch.
The auxiliary switch(es) in the combination accessory
indicates circuit breaker contacts status, and is used for
remote signaling and system interlocking purposes.
Each SPDT switch has one "a" and one "b" contact. The
plug-in module is mounted in slots in the top of the trip
unit; it occupies the accessory cavity in the circuit break-
er frame, and is positioned so that the switch actuator is
operated by the crossbar. When the crossbar is in the
contacts-closed position, the "a" contact of each SPDT
switch is closed and the "b" contact is open. When the
crossbar is in the tripped or contacts-open position, the
"a" contact is open and the "b" contact is closed.
Table 1-1 lists electrical rating data for the auxiliary switch.
For this publication, the term circuit breaker shall also
include molded case switch and motor circuit protector.
40752-094 (1) Effective 04/02
Bul. 140U