Bul. 140U
Q and M-Frame Circuit Breakers
Instruction Leaflet for Shunt Trip
A WARNING
A
1. INTRODUCTION
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
ENERGIZED. 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
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 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.
Fig. 1-1
Shunt Trip Installed in Q-Frame Circuit Breaker
GENERAL INFORMATION
The shunt trip (Fig. 1-1) provides remote controlled electrical tripping for the circuit breaker. It consists of an intermittent rated solenoid with a tripping plunger and a cutoff
switch attached to a plug-in module. The plug-in module
is mounted in slots in the top of the trip unit and occupies
the accessory cavity in the circuit breaker frame. When
the solenoid is energized, the plunger extends and
presses against an intermediate plunger which operates
the trip bar in the trip unit. As the circuit breaker trips, the
molded crossbar presses against the cutoff switch operating arm to open the cutoff switch, disconnecting power
to the solenoid and preventing coil burn out.
40752-075(1) Effective 4/02
Page 2
a
WARNING
IF ENERGY IS APPLIED TO SHUNT TRIP LEADS, DO
NOT ATTEMPT TO RESET AND CLOSE THE CIRCUIT
BREAKER. ATTEMPTING TO CLOSE THE CIRCUIT
BREAKER WHILE ENERGIZED WILL RESULT IN A
"SHOCKOUT" CONDITION.
Table 1-1 lists application and electrical operating rating
data for the shunt trip.
For this publication, the term circuit breaker shall also
include molded case switch and motor circuit protector.
Depending on the model ordered, connections for the
shunt trip are in one of four forms. The standard wiring
configuration is pigtail leads exiting the rear of the base
directly behind the shunt trip. Optional configurations
include a terminal block mounted on the same side of the
base as the accessory, leads exiting the side of the base
where the accessory is mounted, and leads exiting the
rear of the base on the side opposite the accessory. The
18-inch long pigtail leads are color coded for identification; identification labels are provided for pigtail leads and
terminal block points. For allowable locations of all accessories, refer to Selection Guide.
Note: When the walking beam interlock is used with
the circuit breaker, the rear trough cannot be used for
accessory pigtail leads.
This instruction leaflet (I.L.) gives detailed procedures for
installing the shunt trip.
2. INSTALLATION
Note: The shunt trip can be field-installed in Q and
M Frame circuit breakers.
Where local codes and standards permit and UL listing is not required, internal accessories can be field
installed in sealed circuit breakers. In this case, UL
listing becomes invalid and the label should be
removed.
Before attempting to install the shunt trip, check that
the catalog number is correct as ordered and that the
rating of the accessory satisfies job requirements.
The shunt trip, shown in kit form in Fig. 2-1, is installed in
tble right or left accessory mounting cavity of a 2-, 3-, or
4-pole circuit breaker with a fixed thermal or
adjustable thermal trip unit; and, in the left pole only of a
circuit breaker with an electronic trip unit. A shunt
trip must be installed in the circuit breaker before the circuit breaker is mounted in an electrical system. To install
the shunt trip, perform the following procedures:
Note: A circuit breaker that is mounted in an electrical system must be removed to install the accessory.
To ensure correct accessory installation, the circuit
breaker must be placed on a horizontal surface.
A
THE VOLTAGES IN ENERGIZED EQUIPMENT CAN
CAUSE DEATH OR SEVERE PERSONAL INJURY.
BEFORE REMOVING A CIRCUIT BREAKER
INSTALLED IN AN ELECTRICAL SYSTEM, MAKE
SlJRE THE CIRCUIT BREAKER IS SWITCHED TO THE
OFF POSITION AND THERE IS NO VOLTAGE
PRESENT WHERE WORK IS TO BE PERFORMED.
SPECIAL ATTENTION SHOULD BE PAID TO
REVERSE FEED APPLICATIONS TO ENSURE NO
VOLTAGE IS PRESENT.
Note: For new circuit breaker installation, the trip unit
must be installed in circuit breaker before attempting
to install a shunt trip.
2-1.
Switch circuit breaker to OFF position.
2-2. Disconnect and remove circuit breaker from installation and terminal connections.
2-$3. Remove cover screws and covers
Note: For a shunt trip having rear or opposite-side
exiting pigtail leads, thread leads through center
trough in side of base before attempting to insert the
mounting bracket. Pigtail leads exiting in this manner
shlould be eased through trough as mounting bracket
is inserted into trip unit retaining slots. Use center
trough also for leads exiting the side of the circuit
brleaker.
2-4.
40752-075(1) Effective 4/02
WARNING
Route wiring to meet installation requirements.
(See Fig. 2-2.):
Page 3
A
2-6.
CAUTION
LEADS SHOULD BE FORMED AND ROUTED TO
CLEAR ALL MOVING PARTS WHEN ACCESSORY IS
PROPERLY INSTALLED. PIGTAIL WIRES COULD BE
DAMAGED IF IN CONTACT WITH MOVING PARTS.
IF SHUNT TRIP IS REMOVED FROM CIRCUIT
BREAKER, INTERMEDIATE PLUNGER MUST ALSO
BE REMOVED. FAILURE TO REMOVE THE INTERMEDIATE PLUNGER CAN RESULT IN EQUIPMENT DAMAGE.
2-5. Insert shunt trip as described in the following steps
(Fig 2-3)
A WARNING
A
FAILURE TO KEEP FINGERS AWAY FROM MOVING
PARTS CAN CAUSE PERSONAL INJURY. WHEN
INTERMEDIATE PLUNGER IS POSITIONED IN TRIP
UNIT, CIRCUIT BREAKER WILL MOVE TO THE TRlP
POSITON. CARE SHOULD BE TAKEN TO KEEP FINGERS CLEAR OF CIRCUIT BREAKER MECHANISM
PARTS AND HANDLE.
a. Remove barrier from trip unit accessory mounting slots in pole being used for accessory.
b. Position intermediate plunger in trip unit
(Fig. 2-3).
c. Trip circuit breaker by pressing intermediate
plunger into recess in top of trip unit, and hold
plunger in positon.
d. Slide shunt trip plug-in module into slots until
retaining clip snaps into trip unit. Cutoff switch
actuator must be above the crossbar. For terminal block assemblies, slide terminal block into
mounting slot on side of base as plug-in module
is being positioned.
e. If required, complete routing of leads to opposite side through rear wiring trough.
A
WARNING
CONTACT WITH MOVING PARTS CAN CAUSE PERSONAL INJURY. WHEN CHECKING ACCESSORY, DO
NOT PUT FINGERS NEAR MOVING PARTS INSIDE
CIRCUIT BREAKER CASE. SPRINGS CAUSE INTERNAL PARTS TO MOVE QUICKLY AND WITH FORCE.
40752-075(1) Effective 4/02
Perform mechanical check of shunt trip after installation:
a. With the circuit breaker still electrically isolated,
reset the circuit breaker.
b. Using a small flat-blade screwdriver, depress
solenoid plunger (Fig. 2-4). Circuit breaker
should move to trip position.
c. If mechanical check does not trip circuit
breaker, see if shunt trip and intermediate
plunger are correctly installed. If shunt trip and
intermediate plunger appear to be properly
installed and problem persists, contact
Allen-Bradley.
a
CAUTION
WHEN INSTALLING CIRCUIT BREAKER MAIN
COVER, MAKE SURE THAT ALL INTERNAL PARTS
ARE IN PLACE:
SLIDING HANDLE BARRIER IS POSITIONED SO
THAT THE HANDLE OPENING IS ALIGNED WITH
THE HANDLE.
ALL LEADS ARE CLEAR OF THE COVER.
2-7. With circuit breaker handle in TRIPPED position
and accessory pigtail leads (if used) routed as
required, install circuit breaker covers. Secure with
pan-head cover screws. Torque to 20-22 Ib-in
(2.26-2.49 N.m).
Page 4
Fig. 2-1
Shunt Trip Kit
I
Fjg. 2-3
Fig. 2-2
Rear Exiting Leads
(Preferred)
Terminal Rlock
Side Exiting Leads
Opposite-Side
Exiting Leads
Accessory Wiring Options
40752-075(1) Effective 4/02
U
Installing Intermediate Plunger and Shunt Trip
Page 5
Terminal Block
Connection Diagram
Label (When Used)
Identification
Label
Pigtail
~
Flat Blade
Screwdriver
Diagram
(When Used)
Fig. 2-5
Preferred Mounting Locations for Accessory
Nameplate Labels
Note: For molded case switches, omit step c.
c. Press PUSH-TO-TRIP button - no continuity.
Fig. 2-4
Screwdriver Depressing Shunt Trip Solenoid
Plunger
d. If cutoff switch fails test, make sure that shunt
trip module is properly seated in trip unit slots. If
problem persists, contact Allen-Bradley.
2-1 0. Install circuit breaker.
2-8. Place accessory labels (supplied with kit) on circuit
breaker. (See Fig. 2-5.)
Note: Accessory labels show connection diagram for
shunt trip. Pigtail leads are color coded white and
yellow.
2-9. Test cutoff switch. Connect ohmmeter across pigtail leads or terminal block connections. Check
continuity as follows:
a. Circuit breaker handle OFF .- no continuity.
b. Circuit breaker handle ON - less than 9000
ohms.
40752-075(1) Effective 4/02
2-11. Connect shunt trip as required (see Fig. 2-6).
Allen-Bradley assumes no responsibility for malfunctioning accessories installed improperly by the customer.
Page 6
r---- - - - - - -------7
Pigtail Leads
I
Fig. 2-6.
40752-075(1) Effective 4/02
I
I
Shunt Trip Connection Diagram
Page 7
TABLE 1-1. SHUNT TRIP ELECTRICAL RATING DATA
Average circuit breaker contact total opening time approximately 6 milliseconds, depending on voltage.
Endurance - 400 electrical operations plus 5600 mechanical operations
Shunt trip can be operated up to a maximum of six times per minute
Maximum operating voltage - 110% of maximum voltage range rating
Terminal block is approved for use with one or two No. 18 to No. 14 AWG solid or stranded copper wires.
Torque is 7 Ib-in (0.8 Nm).
Catalog Suffix
Field
Mounting
Kit
J
Application Ratings
Electrical Operating Ratings
Factory
Installed
Voltage
(V)
Frequency
(Hz)
Supply
Voltage
(V)
Minimum
Operating
Voltage
(V)
Ip
(A)
-PJ
12-24
50160
9
12
24
6
7.2
11.6
28.6
12-24
DC
9
12
24
6
lrmsat
0.250s
(A)
lrms at
0.033s
(A)
VA
One
Minute
Dielectric
Withstand
Voltage (V)
5.1
8.2
20.2
46
98
485
1048
8.5
8.6
17.4
75
103
41 8
2
2
48-60
50160
48
60
34
0.72
1.2
0.51
0.84
25
50
1120
D
-PD
110-240
50160
110
120
127
208
220
240
77
0.89
1.03
1.1
2.3
2.4
2.6
0.63
0.73
0.80
1.6
1.7
1.8
69
88
102
333
374
432
1480
N
-PN
380-440
50160
380
400
41 5
440
266
0.30
0.34
0.35
0.38
0.21
0.24
0.25
0.27
80
96
104
119
1880
~~
220-250
DC
220
250
154
50160
480
525
550
600
336
B
-PB
480-600
2
2
48-60
2
2
110-125
DC
110
120
125
0.05
0.05
0.06
0.08
0.07
0.07
0.08
0.11
2200
0.76
0.95
36
57
1120
77
0.42
0.43
0.44
46
52
55
1250
(1) Suitable for use with Class 1 GFP devices; marking label supplied with accessory kit.
40752-075(1) Effective 4/02
24
26
33
48
34
Notes:
2 Contact Allen-Bradley for Availability
75
85
0.34
0.34
Page 8
40752-075(1) Effective 4/02
Printed in U.S.A./TQC
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