Rockwell Automation 140U Q, M Frame CB Alarm Switch and Auxiliary Switch Combination - Manual

40752-076(1) Effective 4/02
Q and M-Frame Circuit Breakers
Instruciton Leaflet for Alarm Switch
and Auxiliary Switch Combinaiton
CONTACT WITH ENERGIZED EQUIPMENT CAN
RESULT IN DEATH, SEVERE PERSONAL INJURY,
OR SUBSTANTIAL PROPERTY DAMAGE. DO NOT
ATTEMPT TO INSTALL OR PERFORM MAINTE-
NANCE ON EQUIPMENT WHILE IT IS ENERGIZED.
ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT
BEFORE PROCEEDING WITH THE TASK, AND
ALWAYS FOLLOW GENERALLY ACCEPTED SAFE-
TY PROCEDURES.
ALLEN-BRADLEY IS NOT LIABLE FOR THE MISAP-
PLICATION OR MISINSTALLATION OF ITS PROD-
UCTS.
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 judge-
ment, 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 instruction.
1.0 INTRODUCTION
General Information
The alarm (signal)/ lockout switch (ASL switch) (Figure
1-1) is attached to a plug-in module available in the fol-
lowing 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
breaker 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
!
WARNING
mounted so that the switch actuator arm is controlled by
the circuit breaker operating mechanism cradle.
When the circuit breaker is in the ON or Off position, the
cradle holds the make contact open and the break con-
tact closed. When the circuit breaker is in the tripped
position, the make contact is closed and the break con-
tact is open. Any type of trip operation (for example,
automatic trip, shunt trip, or undervoltage release) actu-
ates 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
breaker frame, and is positioned so that the switch actu-
ator is operated by the crossbar. When the crossbar is
in the contact-closed position, the “a” contact of each
Figure 1-1 Alarm (Signal)/ Lockout Switch Installed in L-
Frame Circuit Breaker
Bul. 140U