Allen-Bradley 140G-R Series User manual

DIR 1000682R0002 Version 03 (1)
WARNING:
WARNUNG:
AVERTISSEMENT:
To prevent electrical shock, disconnect from power source before
installing or servicing. Install in suitable enclosure. Keep free from contaminants.
Per prevenire infortuni, togliere tensione prima dell'installazione o
manutenzione. Installare in custodia idonea. Tenere lontano da contaminanti.
Vor Installations- oder Servicearbeiten Stromversorgung zur
Vermeidung von elektrischen Unfällen trennen. Die Geräte müssen in einem
passenden Gehäuse eingebaut und gegen Verschmutzung geschützt werden.
Avant le montage et la mise en service, couper l'alimentation
secteur pour éviter toute décharge. Prévoir une mise en coffret ou armoire appropriée.
Protéger le produit contre les environnements agressifs.
Desconéctese de la corriente eléctrica, antes de la instalación o
AVVERTENZA:
ADVERTENCIA:
del servicio, a fin de impedir sacudidas eléctricas. Instálelo en una caja apropiada.
Manténgalo libre de contaminantes.
ATENÇÃO: Para evitar choques, desconectar da corrente elétrica antes de fazer a
instalação ou a manutenção. Instalar em caixa apropriada. Manter livre de
contaminantes.
Installation - Installazione - Instalación
Instalação - -
(Follow NFPA70E requirements).
DIR 1000682R0002 Version 03 140G-R_
Bul. 140G
Installation instruction for 140G-R
Istruzioni di installazione
Installationsanleitung
Instructions pour l’installation
Instrucciones de instalación
3p
X1
X1 X32 X64X2
3000A ONLY
4p
3000A
2000A
2500A (80%)
3000A
2000A
A - PLAIN WASHER
B - ELASTIC WASHER
SCREW M5 x 14
NUT M5
X2 X48 X24
X3
X3
3000A ONLY 3000A 100%
ONLY
X10
X8
3000A 100%
ONLY
X40
X32
SCREW M4 x 14
AB
CH19
T25
Ch10
Escutcheon
2500A (100%)
2500A (100%)
2500A (80%)
X1
X1
NOTE: MCCB without door interlock is not shown
xx lb-in
xx Nm
Required tool

DIR 1000682R0002 Version 03 (2)
8 Maintenance ............................................................ 13
8.1 Warnings ............................................................................ 13
8.2 Maintenance program ........................................................ 13
8.2.1 Circuit breaker life .............................................................. 13
8.2.2 Maintenance program ....................................................... 13
8.3 First Level maintenance operations ................................... 14
8.3.1 Preliminary operations:....................................................... 14
8.3.2 General inspections and cleaning: ..................................... 14
8.3.3 Circuit breaker connections and connections between
circuit breaker and switchboard......................................... 14
8.3.4 Circuit-breaker Cover and Side Guards disassembly ........ 14
8.3.5 Mechanical operating mechanism ..................................... 15
8.3.6 Electrical and mechanical accessories .............................. 15
8.3.7 Trip Unit Operation ............................................................. 15
8.3.7.1 Test Menu ........................................................................... 15
8.3.7.2 Autotest .............................................................................. 15
8.3.7.3 Trip test............................................................................... 15
8.3.7.4 MM test .............................................................................. 16
8.3.8 Maintenance Operations: Final Inspection......................... 16
8.4 Second Level maintenance operations.............................. 17
8.4.1 Warnings: ........................................................................... 17
8.4.2 General inspections and cleaning: ..................................... 17
8.4.3 Circuit breaker connections and connections between
circuit breaker and switchboard......................................... 17
8.4.4 Circuit-breaker Cover and Side Guards disassembly ........ 17
8.4.5 Mechanical operating mechanism ..................................... 18
8.4.6 Electrical and mechanical accessories .............................. 19
8.4.7 Trip Unit Operation ............................................................. 19
8.4.7.1 Test Menu ........................................................................... 19
8.4.7.2 Autotest .............................................................................. 19
8.4.7.3 Trip test............................................................................... 19
8.4.7.4 MM test .............................................................................. 19
8.4.8 Maintenance operations; final inspections......................... 20
9 Troubleshooting Table .............................................. 21
10 Accessories.............................................................. 22
10.1 Electrical accessories......................................................... 22
10.2 Mechanical locks................................................................ 23
11 Trip Unit References................................................. 24
11.1 Safety notes ....................................................................... 24
11.1.1 Notes for dielectric strength tests ...................................... 24
12 Overall dimensions .................................................. 25
13 Circuit diagrams....................................................... 32
Index
Important User Information .................................................... 3
1 Description................................................................. 4
1.1 General characteristics......................................................... 4
1.2 External front view of the circuit breaker.............................. 4
2 Inspect Packaging ..................................................... 4
3 Storage, lifting and weights ..................................... 4
4 Installation.................................................................. 5
4.1 Installation conditions .......................................................... 5
4.2 Installation of door interlock (factory supplied option) ......... 5
4.3 Installation of the escutcheon for flush mounted (to door)
applications ......................................................................... 6
4.4 Heat sink installation (3000A 100% rated only).................... 6
4.5 Mechanical Door Interlock operating instruction (factory
supplied option).................................................................... 7
4.5.1 Normal operating conditions (interlock armed) ................... 7
4.5.2 Defeating the interlock for service operations...................... 7
4.5.3 Coils support maintenance .................................................. 7
5 Electrical connections................................................ 8
5.1 Power circuit connections.................................................... 8
5.1.1 Shapes of the terminals........................................................ 8
5.1.2 Examples of connection busbar layouts depending on the
types of terminals ................................................................ 8
5.1.3 Assembly procedures for the busbar connection ................ 9
5.2 Control circuit and field wiring.............................................. 9
6 Commissioning the MCCB ...................................... 10
6.1 General procedures............................................................ 10
7 Instructions for use .................................................. 11
7.1 Operating and signalling components .............................. 11
7.2 Circuit breaker closing and opening procedures ............... 11

DIR 1000682R0002 Version 03 (3)
Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment
before you install, configure, operate, or mantain this product. Users are required to familiariza themselves with installation and wiring instructions
in addition to requirements of all applicable codes, laws, and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to be carried out by
suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of
this equipment.
The examples and diagrams in this manual are included solely for illustrative purpose. Because of the many variables and requirements asso-
ciated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples
and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this
manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
!
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous
environment, which may lead to personal injury or death, property damage, or economic loss.
!
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or
economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to potential Arc
Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL Regulatory requirements
for safe practices and for Personal Protective Equipment.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage
may be present.
PINCH POINT LABEL: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that cut/crush hazard
may be present.
READ INSTRUCTION SYMBOL: Labels may be on or inside the equipment, for example, a drive or motor,
to alert people to read the Instruction Manual of the equipment.
At the end of its life, this equipment should be collected separately from any unsorted municipal waste

DIR 1000682R0002 Version 03 (4)
1
2
3
1 Description
1.1 General characteristics
140G-R MCCB and molded case switch consist of a plastic structure which houses the operating mechanism, the poles and the auxiliary parts.
Each pole is insulated from the others and contains circuit breaking parts and the current sensor of the corresponding phase.
1 Electronic trip unit
2 Operating and control parts of the operating mechanism and release-tripped signals
3 Nameplate
1.2 External front view of the circuit breaker
Fig. 1
Fig. 4 Fig. 5
2 Inspect Packaging
Examine the condition of the material received and make sure that it corresponds to what was ordered. Any damage or non-compliance found
when the material has been unpacked, which must be carried out with due care, must be notified within 5 days of receipt and the number of the
shipping notice must be indicated on the notification.
3 Storage, lifting and weights
Protected by an external wooden crate, the circuit breaker is fastened with screws to the pallet used for transport or to the bottom of the pack-
ing crate.
If the circuit breaker must be stored for even a short period of time before being put into service, after having been checked on receipt it must
be put back into its container and covered with a waterproof material.
Caution
– Store the circuit breaker in a dry, dust-free room well away from aggressive chemicals.
– Place the circuit breaker and any fixed part on a horizontal surface, not in direct contact with the floor but on a suitable support (Fig. 4).
– The maximum number of circuit breakers that can be stacked on top of each other is shown in figure 5.
– Keep the circuit breaker in the open position with the closing springs unloaded to prevent unwarranted stress and the risk of accidents to the
personnel.

DIR 1000682R0002 Version 03 (5)
Fig.7a
Table of circuit breaker weights
Note
The weights given in the table refer to circuit breakers complete with LSIG trip unit, excluding the accessories.
4 Installation
4.1 Installation conditions
Install the circuit breaker in a dry, dust-free, non-corrosive enviroment
where it will not be subjected to shocks or vibrations. When this is
not possible, assemble it inside an enclosure with a suitable degree
of protection.
Refer to the “Overall dimensions” chapter, which provides information
about the following points:
– minimum installation volume for the circuit breaker
– clearances to uninsulated parts of enclosure
– overall dimensions of the circuit breakers
– drilling holes for panel mounting
– drilling holes for escutcheon and IP54 flush mount enclosure door.
Installation, commisionning, service and preventive maintance must
be performed by skilled personnel with detailed knowledge of the
equipment.
The R frame must only be mounted in a vertical plane. Installation
of the frame requires eight (8) M8 fasteners as shown in figure 7.
4.2 Installation of door interlock (factory supplied option)
Make the latching bracket holes on
the door-panel, as indicated in the
drilling template (see chapter 12).
To ensure the correct device opera-
tion, align the bracket with the C.B.’s
interlock mechanism.
The indicated dimensions must be
respected; if needed use properly
the spacers provided.
Fig. 6
Comply with the following instructions when lifting the circuit breaker: the circuit breakers must be placed on a sturdy surface and preferably
lifted with an appropriate fork-lift truck. The use of ropes is permitted: In this case, the lifting ropes must be attached as shown in the figure 6.
Circuit breaker 3 poles 4 poles
Frame kg lbs kg lbs
2000 A 73 161 95 209
2500 A 73 161 95 209
3000 A 95 209 125 276
SPACERS
BRACKET
DOOR-PANEL
B
A
Fig.7

DIR 1000682R0002 Version 03 (6)
1
2
Fig. 8
Y
Y
N
Fig. 9
4.3 Installation of the escutcheon for flush mounted (to door) applications
- Drill the holes in the enclosure door indicated in the section entitled “Overall dimensions”.
- Install the escutcheon (Fig. 8) to the front of the enclosure door. Attach from the inside using self tapping screws (2).
4.4 Heat sink installation (3000A 100% rated only)
Assemble the heat sink on the terminals according to the scheme indicated (Fig.9). Tightening torque 4 Nm - 35,4 lb-in.
Then re-assemble the terminals to the circuit breaker. Tightening torque 40 Nm - 354 lb-in.

DIR 1000682R0002 Version 03 (7)
Fig. 9A
Fig. 9B
Fig. 9C
4.5 Mechanical Door Interlock operating instruction (factory supplied option)
4.5.1 Normal operating conditions (interlock armed)
• Panel door can be opened with circuit-breaker open only
• If panel door is open it is not possible to close the circuit-breaker
4.5.2 Defeating the interlock for service operations
!WARNING: Upon release of door, an indicator on the Circuit breaker interlock will display
a "Dangerous Condition" symbol.
c) Interlock is automatically re-armed when panel door is re-closed.
4.5.3 Coils support maintenance
If coils support should be removed or reassembled, see 8.3.6
Push
Fig. 9D
OPEN
A
PERTO
A
US-STELLUNG
OUVERT
A
BIERTO
a) With panel door closed, insert a pin (dia. 4mm. max.) in the panel door hole and press until it stops (see fig.9B).
!WARNING: Defeating the interlock for service operations must be done only by trained qualified personnel. A
safety indicator shows when the interlock is defeated.
!WARNING: Defeating of the interlock for service operations must be done only with the panel door closed.
Keep
ingPush
Pull
b) Open the door for half an inch keeping the pin pressed; then remove the pin and complete the door opening. The circuit-breaker remains
close and the interlock is defeated (see fig.9C).
!WARNING:
- Panel door can be opened with circuit-breaker closed.
- If panel door is open it is possible to open and re-close the circuit-breaker

DIR 1000682R0002 Version 03 (8)
FES VR VR
5 Electrical connections
5.1 Power circuit connections
Use cables or insulated bars or perform specific type tests according to the reference standard of the specific installation.
5.1.1 Shapes of the terminals
Fig. 10
Note
The drawings provide a schematic illustration of the type of terminal. The exact shape of the terminals is given in the chapter entitled “Overall
dimensions". The terminals installed on the upper and lower parts (input and output) can be different from each other.
Front terminals 2000A
(80% and 100% rated)
2500A (80% rated)
5.1.2 Examples of connection busbar layouts depending on the types of terminals
The busbars allow connections to be made between the terminals of the MCCB and the system bus
The following table illustrates the minimum dimensional cross section for busbar connection.
Extended spread
terminals
2000A-2500A (IEC)
Vertical rear terminals
for flat bar 2000A
(80% and 100% rated )
2500A (80% rated)
Vertical rear terminals
2500A (80% rated)
3000A (80% and
100% rated)
Lugs for CuAl cables
2000A (100% rated)
2500A (80% rated)
MC
(1) Always use two wrenches (to avoid straining the insulating parts of the breaker), and apply the tightening torque of the terminals using high-strength fasteners.
Check tighteness after 24 hours.
Fig. 11
140G-R
Frame
Size
Qty.
Required
Busbar Dimensions Terminal Torque
Wrench
size
Width(A) Thickness(B)
Terminal
Holes (four)
Diameter (C)
Hole
Center
(D)
Distance Between
Terminal Holes (E) Fastener [lb-in.] [Nm]
Front Busbar
2000 A 2
[in.] 4 0.25 0.59 0.79 1.57
Fasteners supplied by customer
[mm] 102 6.4 15 20 40
2500 A,
80% 2
[in.] 4 0.25 0.59 0.79 1.57
[mm] 102 6.4 15 20 40
Rear Busbar(1)
2000 A 2
[in.] 4 0.25 0.59 4.5 1.57
Fasteners supplied by customer
[mm] 102 6.4 15 114 40
2500 A,
80% 2
[in.] 4 0.25 0.59 4.5 1.57
[mm] 102 6.4 15 114 40
2500 A,
100% 4
[in.] 4 0.25 0.512 3.87 1.75 M12
Stud 615 70 19 mm
[mm] 102 6.4 13 98 44.45
3000 A,
80% 4
[in.] 4 0.25 0.512 3.87 1.75 M12
Stud 615 70 19 mm
[mm] 102 6.4 13 98 44.45
3000A,
100% 4
[in.] 4 0.25 0.512 3.87 1.75 M12
Stud 615 70 19 mm
[mm] 102 6.4 13 98 44.45
B
E
D
A
C(dia.)
E

DIR 1000682R0002 Version 03 (9)
Positioning the first anchor plate of the busbars
Anchoring to the switchboard max dimensions
Fig. 12
5.1.3 Assembly procedures for the busbar connection
Check the state of the contact surfaces of the connections very carefully: they must be very clean and free from burrs, dents and traces of rust
- which must be removed with a fine file or emery cloth to prevent localized increases in temperature. On completion of the operation, remove
any traces of grease or dust with a cloth soaked in a suitable solvent.
When aluminium connections are used, the contact surfaces must be tin-plated.
Make sure that the busbar connections do not exert strain on the terminals in any direction.
Always insert a large diameter flat washer and spring washer (to distribute the tightening pressure over the widest possible area).
Establish contact between the connection and terminal and fully tighten to the required torque.
Always use two wrenches (to prevent the insulating parts from being unduly stressed) and apply the tightening torque of the main terminals = 70
Nm/615 lb in for M12 high-strength screws. Check tightness after 24 hours.
5.2 Control circuit and field wiring
The field connection are made using screw terminals. Terminals are marked with identification codes as indicated in the electrical circuit diagram.
Fig. 13
190
190 190
190
190
190
7.48" 7.48"
7.48"
7.48"
7.48"
7.48"
D14 D13 D2 D1 C12 C11 C2 C1 C13 C3 11 12 14 21 22 24 31 32 34 41 42 44 48 46 45 W2 W1 98S 95S K15 K14 K13 K12 K11 K21 K2 K1 W4 W3 T10 T9 T8 T7 T6 T5 T4 T3 T2 T1 R2 R1 98 96 95 38 37 U2 U1
There are variables when using different dimensional sized busbar, and/or the number of busbars. It is requirement to maintain the minimum
cross section as shown in the table and use the entire contact surface of the terminal. Vertical busbar for 2500A (100%) and 3000A (80...100%)
are required to have .25 inch (6.4 mm) thickness for the inner (3) busbars.

DIR 1000682R0002 Version 03 (10)
6 Commissioning the MCCB
6.1 General procedures
– Make sure that the power connections to the circuit breaker terminals are tight
– Make adjustments to the trip unit protection functions [LSIG].
– Make sure that voltage of the auxiliary circuits is between 85% and 110% of the rated voltage
– To avoid temperature rises, make sure that there is sufficient air exchange in the installation area
– Also perform the inspections indicated in the following table.
Item inspected
1 Manual operating mechanism
2 Spring charging motor (if provided)
3 Undervoltage release
(if provided)
4 Shunt opening release (if provided)
5 Shunt closing release (if provided).
6 Lock for circuit breaker in open position
(key or padlock)
7 Auxiliary circuit breaker contacts
Procedure
Perform a few opening, closing and release
operations (see chap. 7.2).
WARNING
When there is an undervoltage release, the cir-
cuit breaker can only be closed after the release
itself has been electrically energized.
Operate the Charging motor at the rated voltage.
Perform a few closing and opening operations.
Note. Supply the undervoltage release at the
rated voltage (if provided).
Supply the undervoltage release at the rated
voltage and perform the circuit breaker clos-
ing operation.
Turn off the voltage supply to the release.
Supply the undervoltage release at the rated
voltage and perform the circuit breaker clos-
ing operation.
Close the circuit breaker.
Supply the shunt opening release at the rated
voltage.
Open the circuit breaker.
Power the shunt closing release at the its
rated voltage.
Open the circuit breaker, turn the key and
remove it. Attempt the circuit breaker closing
operation.
Connect the auxiliary contacts to signalling
circuits. Perform a few circuit breaker closing
and opening operations.
Successful check
The spring loading lever moves normally.
The springs are loaded normally.
The signals are normal.
The motor stops when the springs have been
loaded.
The motor reloads the springs after each
closing operation.
The circuit breaker closes normally. The signals
are normal.
The circuit breaker opens. The signal changes
over.
The circuit breaker opens normally. The signals
are normal.
The circuit breaker closes normally. The signals
are normal.
Both manual and electrical closing are pre-
vented.
Signalling occurs normally.

DIR 1000682R0002 Version 03 (11)
1
8
2
3
4
6
5
7
Note
A transparent plastic cover with IP54 (Purchase separately) can be flush mounted to the enclosure door. The cover is equipped with a key lock.
Fig. 15
7 Instructions for use
7.1 Operating and signalling components
1 Push-button for the manual opening operation
2 Lever for manual loading of the closing springs
3 Mechanical indicator for circuit breaker open “O” and closed “I”
4 Mechanical indicator for protection release tripped
5 Pushbutton for the manual closing operation
6 Indicator for springs loaded - unloaded
7 Operation counter (purchase separately) Catalog No.140-G-R-MOC
8 Key lock on the closing operation (purchase separately) Kirk SD
series cam lock PN-387658 available through Rockwell Automation
Customer Care.
Fig.14
2
36
Fig. 16
7.2 Circuit breaker closing and opening procedures
Circuit breaker operation can be either manual or electrical.
a) Manual operation for loading the closing springs
– Make sure that “O” (circuit breaker open) is displayed by the indicator
– Make sure that the indicator (6) is WHITE (springs unloaded)
– Repeatedly operate the lever (2) until the color of the indicator (6)
changes to YELLOW
b) Electrical operation for loading the closing springs
Electrical operation of the circuit breaker is possible when the following
accessories are installed:
– charging motor for automatic loading of the closing springs
– shunt closing release
– shunt opening release.
The charging motor automatically reloads the springs after each clos-
ing operation until the yellow indicator appears (6, Fig. 16). If there is
a power failure during the loading operation, the charging motor stops
and automatically continues with the spring loading operation once the
power returns. However, it is always possible to complete the reloading
operation in the manual mode.
140G-R-BC12

DIR 1000682R0002 Version 03 (12)
3
5
6
3
1
Fig. 17
Press
Fig. 18
Press
d) Circuit breaker opening
Press the push-button “O” (1) to open the circuit breaker in the manual mode. When there is a shunt opening release, the operation can also
be carried out in the remote mode by means of a separate control circuit. The open state is signalled by the appearance of the letter “O” in the
indicator (3, Fig. 18).
c) Circuit breaker closing
This operation can only be carried out when the closing springs are fully loaded.
Press the push-button (5, Fig. 17) marked with the letter “I” for closing in the manual mode. When there is a shunt closing release, the operation
can also be carried out in the remote mode by means of a separate control circuit. Closing is signalled by the relative indicator (3), which moves to
the “I” position. Moreover, the indicator of the state of the springs (6) moves to the WHITE position. The control has enough energy for the opening
operation even when the closing springs are unloaded. If present, the charging motor immediately begins the automatic spring loading operation.

DIR 1000682R0002 Version 03 (13)
8 Maintenance
8.1 Warnings
WARNING RISK OF ELECTRICAL SHOCK
!IMPORTANT NOTE: before performing any maintenance operation:
-Turn circuit breaker to the OFF position. Make sure springs of the operating mechanism are discharged.
-Remove power from Power and Control terminals and visibly ground line side and load side terminals.
Rockwell Automation declines any responsibility for the injury of people or property damage resulting from the failure to comply
with the instructions set out in this document.
Installation putting into service routine and emergency maintenance shall be performed by qualified personnel with detailed
knowledge of this device.
8.2 Maintenance program
8.2.1 Circuit breaker life
When regular maintenance is performed, 140G-R circuit breakers - with or without shunt opening or shunt closing devices - can
withstand the following operating cycles without replacement of parts. (1)
Mechanical life (2) Electrical life (2)
Frame rated current [A] N° of
operations
x 1000
Frequency
operations/
hour
415 V ~
N° of operations x 1000 Frequency operations/hour
2000A 15 60 4.5 30
2500A 15 60 4 30
3000A 15 60 3 30
(1) Values reflect installation in accordance with the Installation Instructions.
(2) Extreme enviromental conditions, pollutants and/or shock and vibrations can reduce the life of this product.
8.2.2 Maintenance program
Carry out the following operations at least once a year in normal operation or otherwise every 6 months, and under all circumn-
stances after tripping due to a short circuit.
- Circuit-breakers that are operated infrequently or that remain closed or open for long periods of time are subject to First Level
maintenance.
- Installation of the mechanical operation counter (supplied separately) is recommended.
- Visually inspect from the outside for damage; remove any dust or dirty using clean dry rags.
Maintenance operations Intervals
Installations in normal places Installations in dusty or polluted places ( 1)/( 2)[
(1) = level of dust measured > 1 mg/m³ ]
First Level One year, or 20% of mechanical life, or 20%
of electrical life
6 months, or 10% of mechanical life, or 10%
of electrical life
Second Level Three years, or 50% of mechanical life, or
50% of electrical life, or after a trip under
short-circuit
18 months, or 25% of mechanical life, or
25% of electrical life, or after a trip under
short-circuit
(1) Values reflect installation in accordance with the Installation Instructions.
(2) Extreme enviromental conditions, pollutants and/or shock and vibrations can reduce the life of this product.

DIR 1000682R0002 Version 03 (14)
8.3.2 General inspections and cleaning:
- Check to make sure that the device is clean. Remove any dust and traces of oil or grease with a clean, dry cloth (use a mild
detergent if necessary - A cleaning product such as Henkel’s 273471 or equivalent can be used if there is a heavy coating of dirt).
- Make sure that the rating plates with the technical specifications of the apparatus are affixed.
- The nameplate must be cleaned with a clean, dry cloth.
- Remove all traces of dust, mold, condensation and tarnish
- Make sure that there are no foreign bodies in the circuit breaker.
8.3.3 Circuit breaker connections and connections between circuit breaker and switchboard
- Remove any dust and dirt with a brush and dry cloth - use a mild detergent if necessary. Use a cleaning product such as Hen-
kel’s 273471 or equivalent if there is a heavy coating of dirt.
- Make sure that there are no traces of localized overheating on the terminals. This problem is denoted by the change in the color
of the parts in contact. These parts are usually silvery in color.
- Make sure that the bolts of the terminal connections are tightened (M12 - 619.5 lb-in / 70 Nm).
!WARNING: disconnect the power circuit and auxiliary circuits and ground the terminals in a visible way on both
the supply side and load side.
- Make sure that the control circuit and field connection screws are well tightened in the terminal boxes (6.19 lb-in / 0.7 Nm).
Fig. 19
8.3.4 Circuit-breaker Cover and Side Guards disassembly
– Make sure the circuit-breaker has been disabled as described in sect. 8.1
– Open Clear Door (1) on the trip unit as shown in figure 19.
– Remove the Breaker Cover (2) by removing the four screws (3).
– Remove both the Side Guards (4) by removing the mounting screws (5).
4
2
1
4
3
5
3p 4p
1
3
2
5
8.3 First Level maintenance operations
8.3.1 Preliminary operations:
- open the circuit breaker and make sure that the springs of the operating mechanism are discharged.
!WARNING: disconnect the power circuit and auxiliary circuits and ground the terminals in a visible way on both
the supply side and load side.
- If the undervoltage release is installed, disassemble the coil support and discharge the springs of the operating mechanism by
closing and opening the circuit breaker.
Fig. 21
Fig. 20

DIR 1000682R0002 Version 03 (15)
8.3.5 Mechanical operating mechanism
- Clean the points indicated in figure 21. Use a cleaning product such as Henkel’s 273471 or equivalent if there is a heavy coat-
ing of dirt.
- Lubricate the opening and closing latches and the shafts in the points indicated in figure 22.
- Make sure that the opening and closing shafts are free to turn.
Fig. 22
8.3.6 Electrical and mechanical accessories
- Make sure that internal accessories (i.e. shunt, spring charging motor) are securely mounted in the circuit breaker.
- Make sure the control circuit and field connects terminals are tightened (6 lb-in / 0.7 Nm).
- Spring Charging Motor: After every 10,000 operations, inspect brushes for wear and replace the motor if necessary.
- Inspect internal accessories (i.e. Shunt trip, Shunt Close & UV relay) for absence of excessive wear, overheating and breakage,
Fig. 23.
- Test the mechanical counter (by operating the circuit-breaker) for proper functionality.
!WARNING: If the mechanical door interlock is present, before removing the coils support, defeat the interlock
as indicated (see 4.5.2).
8.3.7 Trip Unit Operation
Power a trip unit with a battery accessory 140G-ELBU and verify proper functionality.
8.3.7.1 Test Menu
The Test menu provides various options for checking the trip unit and CB.
Up to 5 options ara available:
Name Description
1. CB status allows the user to view the CB state read by the trip unit
2. Auto Test allows the display and led test to be performed
3. Trip Test allows an opening command to be transmitted to the CB
4. MM Test module allows output 95S/98S to be checked and the state of K14/K15
8.3.7.2 Autotest
When autotest is activated, the display and leds will perform a test procedure allowing the user to check the state of display and
operation of the leds themselves.
The procedure lasts several second and the sequence is as follows:
Phase ALARM AND WARNING leds Display
1 On and fixed The words "ALLEN-BRADLEY" and message with the name of "LSIG-MM"
2 Off Flashing backlighting (only if 24V DC supply is present)
3 Normal operation Contrast from 100% (display dark) to 0% (display light), after which the words and
logo reapper
The test result and assessment are at the user's discretion. Inform AB if faults occur (Leds fail to function, display areas that fail
to function correctly)
8.3.7.3 Trip test
The state of CB opening can be checked by activating the trip test.
The trip unit sends a command to the CT, which activates a CB opening mechanism. Opening of the circuit-breaker denotes a
positive test result.
!ATTENTION: To perform the trip test, there must be no current circulating and the CB must be closed
(failing this, the Exception 6 error will appear).

DIR 1000682R0002 Version 03 (16)
8.3.8 Maintenance Operations: Final Inspection
- Fit all the parts back in place and reconnect the auxiliary power supply (if requires).
- Re-assemble the circuit-breaker cover and side guards as shown in figure 25.
Manual Operation (if applicable): Check the Circuit-breaker operation; perform the operations 10 times:
- Charge the Springs - refer to 7.2.a Manual Operation for loading the closing Spring
- Close the Circuit-breaker - refer to 7.2.b Circuit-breaker closing
- Open the Circuit-breaker - refer to 7.2.d Circuit-breaker opening
- Charge the Spring - repeating the operation.
- While sequencing the Circuit-breaker check to see that the Auxiliary contacts are functioning correctly.
- Open the Circuit-breaker - Inspect and test to determine that the padlock (or key) are functioning correctly, when installed.
Remote Operation (if applicable): Installed in the circuit-breaker will be (1) spring charging motor, (1) Shunt Trip Relay and (1)
Shunt Close Relay to perform the operations of opening and closing the circuit-breaker. Using local or remote functions from the
control circuit, perform the operations 10 times:
- Charge the spring Motor - refer to 7.2.b Electrical operation for loading the closing springs.
- Close the Circuit-breaker - Using local or remote signal, energize Shunt Close Relay. Refer to 7.2.c Circuit-breaker closing.
- Open the Circuit-breaker - Using local or remote signal, energize Shunt Open Relay. Refer to 7.2.d Circuit-breaker opening.
- Repeating the operation - the spring charging motor should be continuously charging as the circuit-breaker is cycled ON-OFF.
- While sequencing the Circuit-breaker check to see that Auxiliary contacts are functioning correctly.
- Open the Circuit-breaker - Inspect and test to determine that the padlock (or key) are functioning correctly, when installed.
9.7 lb-in
1.1 Nm
1
2
3
Fig. 25
8.3.7.4 MM test
The test menu is available with the MM trip unit version. 2 possible option can be selected:
- Auto Test causes contacts 95s/98s to close for 1s.
- Input allows the state of inputs K14/K15 to be verified: On for 15 VDC voltage values, Off for < 2 VDC voltage values.
The verification and test setup are at the user's discretion and must comply with the maximum limits of the inputs and outputs.

DIR 1000682R0002 Version 03 (17)
8.4.2 General inspections and cleaning:
- Check to make sure that the device (interrupting part) is clean. Remove any dust and traces of oil or grease with a clean, dry
cloth (use a mild detergent if necessary - A cleaning product such as Henkel’s 273471 or equivalent can be used if there is a
heavy coating of dirt).
- Make sure that the rating plates with the technical specifications of the apparatus are affixed
- The nameplate can be cleaned with a clean, dry cloth.
- Remove all traces of dust, mold, condensation and tarnish
- Inspect for traces of overheating or cracks, wich could create conductive paths across isolating devices.
- Inspect for and remove any foreign bodies inside of the breaker assembly.
- Inspect and check the torque on the eight mounting bolts attaching the circuit-breaker to the panel (M8 - 221 lb-in / 25 Nm).
8.4.3 Circuit breaker connections and connections between circuit breaker and switchboard
- Remove any dust and dirt from the isolating parts with a brush and dry cloth (use a mild cleaning product if necessary - A
cleaning products such as Henkel’s 273471 or equivalent can be used if there is a heavy coating of dirt).
- Make sure that there are no traces of localized overheating on the terminals. This problem is denoted by the change in the color
of the parts in contact. These parts are usually silvery in color.
- Make sure that the bolts of the terminal connections are tightened (M12 - 619.5 lb-in / 70 Nm).
- Make sure that the control circuit and field connection screws are tightened in the terminal boxes (6.19 lb-in / 0.7 Nm).
8.4.4 Circuit-breaker Cover and Side Guards disassembly
– Make sure the circuit-breaker has been disabled, as described in sec. 8.4.1
– Open the Clear Door (1) on the Trip Unit as shown in figure 26.
– Remove the Breaker Cover (2) by removing the four screws (3).
– Remove both the Side Guards (4) by removing the mounting screws (5).
Fig. 26
4
2
1
4
3
5
3p 4p
1
3
2
5
8.4 Second Level maintenance operations
8.4.1 Warnings:
WARNING RISK OF ELECTRICAL SHOCK
!IMPORTANT NOTE: before performing any maintenance operation:
-Turn circuit breaker to the OFF position. Make sure springs of the operating mechanism are discharged.
-Remove power from Power and Control terminals and visibly ground line side and load side terminals.
Rockwell Automation declines any responsibility for the injury of people or property damage resulting from the failure to comply
with the instructions set out in this document.
Installation putting into service routine and emergency maintenance shall be performed by qualified personnel with detailed
knowledge of this device.

DIR 1000682R0002 Version 03 (18)
- If the undervoltage release is installed, disassemble the coil support and unload the springs of the operating mechanism by
closing and opening the circuit breaker.
Fig. 27
8.4.5 Mechanical operating mechanism
- Clean (use a cleaning product such as Henkel’s 273471 or equivalent if there is a heavy coating of dirt) and lubricate (in the
points indicated in figure 28, det. A, as per the First Level) the shafts and opening closing latches.
- Clean (use a cleaning product such as Henkel’s 273471 or equivalent if there is a heavy coating of dirt) and lubricate the operat-
ing shaft supports, including those on the sides of the circuit breaker (see figure 28, det. B).
- Make sure that the opening and closing shafts are free to turn.
det.Adet.B
Fig. 28
- If the springs are deformed or tarnished, if rings are missing or if the control is excessively worn, the MCCB should be replaced.

DIR 1000682R0002 Version 03 (19)
8.4.6 Electrical and mechanical accessories
- Make sure that internal accessories (i.e. shunt, spring charging motor) are securely mounted in the circuit breaker.
- Make sure the control circuit and field connects terminals are tightened (6 lb-in / 0.7 Nm).
- Spring Charging Motor: After every 10,000 operations, inspect brushes for wear and replace the motor if necessary.
- Inspect internal accessories (i.e. Shunt trip, Shunt Close & UV relay) for absence of excessive wear, overheating and breakage,
Fig. 29.
- Test the mechanical counter (by operating the circuit-breaker) for proper functionality.
!WARNING: in case of trip coil set substitution refer to par. 4.5.2
17.7 lb-in
2 Nm
13
2
Fig. 29
8.4.7 Trip Unit Operation
Power a trip unit with a battery accessory 140G-ELBU and verify proper functionality.
8.4.7.1 Test Menu
The Test menu provides various options for checking the trip unit and CB.
Up to 5 options ara available:
Name Description
1. CB status allows the user to view the CB state read by the trip unit
2. Auto Test allows the display and led test to be performed
3. Trip Test allows an opening command to be transmitted to the CB
4. MM Test module allows output 95S/98S to be checked and the state of K14/K15
8.4.7.2 Autotest
When autotest is activated, the display and leds will perform a test procedure allowing the user to check the state of display and
operation of the leds themselves.
The procedure lasts several second and the sequence is as follows:
Phase ALARM AND WARNING leds Display
1 On and fixed The words "ALLEN-BRADLEY" and message with the name of "LSIG-MM"
2 Off Flashing backlighting (only if 24V DC supply is present)
3 Normal operation Contrast from 100% (display dark) to 0% (display light), after which the words and
logo reapper
The test result and assessment are at the user's discretion. Inform AB if faults occur (Leds fail to function, display areas that fail
to function correctly)
8.4.7.3 Trip test
The state of CB opening can be checked by activating the trip test.
The trip unit sends a command to the CT, which activates a CB opening mechanism. Opening of the circuit-breaker denotes a
positive test result.
!ATTENTION: To perform the trip test, there must be no current circulating and the CB must be closed
(failing this, the Exception 6 error will appear).
8.4.7.4 MM test
The test menu is available with the MM trip unit version. 2 possible option can be selected:
- Auto Test causes contacts 95s/98s to close for 1s.
- Input allows the state of inputs K14/K15 to be verified: On for 15 VDC voltage values, Off for < 2 VDC voltage values.
The verification and test setup are at the user's discretion and must comply with the maximum limits of the inputs and outputs.

DIR 1000682R0002 Version 03 (20)
8.4.8 Maintenance operations; final inspections
- Fit all the parts back in place and re-connect the auxiliary power supply if necessary.
- Re-assemble the circuit-breaker cover and side guards as shown in figure 30.
9.7 lb-in
1.1 Nm
Fig. 23
Manual Operation (if applicable): Check the circuit-breaker operation; perform the operations 10 times:
- Charge the Springs - refer to 7.2.a Manual Operation for loading the closing Spring
- Close the Circuit-breaker - refer to 7.2.b Circuit-breaker closing
- Open the Circuit-breaker - refer to 7.2.d Circuit-breaker opening
- Charge the Spring - repeating the operation.
- While sequencing the Circuit-breaker check to see that the Auxiliary contacts are functioning correctly.
- Open the Circuit-breaker - Inspect and test to determine that the padlock (or key) are functioning correctly, when installed.
Remote Operation (if applicable): Installed in the circuit-breaker will be (1) spring charging motor, (1) Shunt Trip Relay and (1)
Shunt Close Relay to perform the operations of opening and closing the circuit-breaker. Using local or remote functions from the
control circuit, perform the operations 10 times:
- Charge the spring Motor - refer to 7.2.b Electrical operation for loading the closing springs.
- Close the Circuit-breaker - Using local or remote signal, energize Shunt Close Relay. Refer to 7.2.c Circuit-breaker closing.
- Open the Circuit-breaker - Using local or remote signal, energize Shunt Open Relay. Refer to 7.2.d Circuit-breaker opening.
- Repeating the operation - the spring charging motor should be continuously charging as the circuit-breaker is cycled ON-OFF.
- While sequencing the Circuit-breaker check to see that Auxiliary contacts are functioning correctly.
- Open the Circuit-breaker - Inspect and test to determine that the padlock (or key) are functioning correctly, when installed.