Eaton IZM6 Series User manual

WARNING
(1) Only qualified electrical personnel should be permitted to work
on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
WARNING
The instructions contained in this il and on product labels have to
be followed. Observe the five safety rules:
– Disconnecting;
– Ensure that devices cannot be accidentally restarted;
– Verify isolation from the supply;
– Earthing and short-circuiting; and
– Covering or providing barriers to adjacent live parts.
Disconnect the equipment from the supply. Use only authorized
spare parts in the repair of the equipment. The specified mainte-
nance intervals as well as the instructions for repair and exchange
must be strictly adhered to prevent injury to personnel and dam-
age to the switchboard.
Instructions apply to:
IZM6 Series Air Circuit Breaker Instruction Manual
Instruction Manual MN013019EN
IZM61 IZM65/67

Instruction Manual MN013019EN
2 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Purpose
This instruction booklet is intended to give a detailed introduction
of IZM6 circuit breakers. These circuit breakers are commonly
used in low voltage metal enclosed switchgears This booklet
applies only to the circuit breaker. In the case of fixed circuit
breakers, certain sections of this leaflet, referring to such items as
position interlocks and the drawout mechanism, will not apply.
Trip units associated with the air circuit breakers will be
addressed in a general manner in this leaflet. Specific trip unit
details and time-current characteristic curves are covered in a
separate document specific to the trip units.
For application information, consult Eaton or see applicable
Product Guides, Technical Documents, and Industry Standards.
Safety
All safety codes and safety standards must be strictly observed
during installation, operation, and maintenance of this
equipment.
WARNING
The warnings and cautions included as part of this leaflet
are for personnel safety and protection of equipment from
damage. An example of a typical warning label heading is
shown above to familiarize personnel with the style of pre-
sentation. This will help to ensure that personnel are alert
to warnings. In addition, cautions, similar to warnings, are
boldface.
All possible contingencies that may arise during installation,
operation or maintenance do not purport to be covered by this
instruction booklet. If further information is desired by purchaser
regarding particular installation, operation, or maintenance of
particular equipment, contact the local Eaton office.

Instruction Manual MN013019EN
3IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Contents
SECTION 1: CIRCUIT BREAKER OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Usage and scope of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Standards in compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Normal operation, installation and transportation conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
SECTION 2: CIRCUIT BREAKER STRUCTURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
External structure – Fixed type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
External structure – Drawout type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Internal structure: Three-dimension diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
SECTION 3: CIRCUIT BREAKER INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Drawout circuit breaker installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Fixed circuit breaker installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Ground terminal wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Power loss (at ambient temperature of +40°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Derating factors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Recommended bus bar specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
SECTION 4: ACCESSORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SECTION 5: IZM61/65/67 ACCESSORY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SECTION 6: CIRCUIT BREAKER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Charging operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Opening and closing operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Lever-in operation of drawout circuit breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Lever-out operation of drawout circuit breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Drawout circuit breaker position locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
SECTION 7: OUTLINE AND MOUNTING DIMENSION DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SECTION 8: ELECTRICAL WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
IZM61/65/67 electrical wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
SECTION 9: INSTALLATION, OPERATION AND MAINTENANCE NOTICE . . . . . . . . . . . . . . . . . . . . 57

Section 1: Circuit breaker overview
4 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Section 1: Circuit breaker overview
Usage and scope of application
The IZM6 series intelligent general-purpose circuit breakers
(hereafter referred to as circuit breakers) are a new-generation of
high-performance air circuit breakers with advanced technology
and comprehensive functions, thus offering safety and reliability.
The circuit breakers are suitable for use in power distribution
net¬work with AC 50/60Hz, rated operating voltage of up to 690V
AC, and rated operating current of 4000A and below, to distribute
electric energy and protect electric lines and power equipment
from potential hazards due to overload, undervoltage, short cir-
cuit, ground, and current imbalance faults. The circuit breakers
offer a variety of protections using multi-functional trip units with
precise selectivity protection, among which the PT type trip units
can be equipped with optional communication interfaces, easy
to connect the field bus to offer four remote functions including
"remote measurement", "remote adjustment", "remote control"
and "remote communica¬tion" to meet control automation
requirement. When equipped with residual current transformer
and matching trip units, the circuit breakers can also offer residu-
al current protection.
Circuit breakers with the rated current of 1000A and below can
also be used in power networks of AC 50/60Hz and 400V to
protect motors against overload, short circuit, undervoltage and
ground faults. Under normal conditions, they can be used for
infrequent motor starting.
The products have passed national compulsory product certifica-
tion with CCC mark.
The circuit breakers feature isolation function, with the symbol as
“”.
IZM6 series air circuit breaker
Fixed typeDrawout type

Section 1: Circuit breaker overview
5IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Standards in compliance
• IEC 60947-1 and GB 14048.1——Low-voltage switchgear and
control equipment: General
• IEC 60947-2 and GB 14048.2——Low-voltage switchgear and
control equipment: Low-voltage circuit breaker
• IEC 60947-4-1 and GB 14048.4——Low-voltage switchgear and
control equipment: Electro-mechanical contactor and motor
starter
• GB/T 14597——Climatic environmental conditions at different
altitudes for electrical product
• GB/T 2423.1——Environmental test of electrical and electronic
product
• GB/T 20626.1——Plateau electrical and electronic products
under special environmental conditions Part 1: General techni-
cal requirements
Normal operation, installation and transportation condi-
tions
• The electrical and mechanical characteristics are suitable for
ambient temperature of -25°C - +70°C with 24-hour average
values equal to or below +35°C. When above +55°C, derating is
needed for use. See Derating Factor Table.
• The altitude should not exceed 5000m at the installation
site. When higher than or equal to 2000m, the electrical
performance of the circuit breaker needs to be corrected;
• With the maximum temperature at +40°C, the relative air
humidity does not exceed 50%. A higher relative humidity (RH)
is allowed at a lower temperature, such as 90% RH when at
20°C. Special measurement should be taken for occasional
condensation due to temperature changes.
• Pollution level: 3;
• Protection degree: IP40 when the circuit breaker is installed
inside cabinet cubicles and the door escutcheon is installed
• Utilization category: B;
• Mounting category: IV for the circuit breaker’s main circuit and
the power supply transformer’s primary coil, and III for the
remaining auxiliary circuits and control circuits;
• The vertical inclination does not exceed 5° during mounting;
• Transportation and storage temperature:-25°C - +85°C.

Section 2: Circuit breaker structure
6 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Section 2: Circuit breaker structure
External structure – Fixed type
External structure – Drawout type
Secondary terminal
Support
Grounding bolt
Intelligent controller (without disconnecting switch)
Open/closed indication
Released/Charged indication
Nameplate
Manual charging handle
Closing button
Opening button
Fault tripping indicator/Rest button (without dis-
connecting switch)
1
2
3
4
11 10 9 8
56 7
9
8
7
6
5
4
3
2
1
10
11
Secondary terminal
Cassette
Intelligent controller (without disconnecting switch)
Grounding bolt
Position locking device
Lock catch button
Three position indication
Nameplate
Open/Closed indication
Released/Charged indication
Manual charging handle
Closing button
Opening button
Fault tripping indicator/Rest button (without dis-
connecting switch)
1
2
3
4
567 8
9
10
11121314
9
8
7
6
5
4
3
2
1
10
11
12
13
14

Section 2: Circuit breaker structure
7IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Internal structure: Three-dimension diagram
1
2
3
4
5
6
7
8
9
10
11
13
14
15
16
12
9
8
7
6
5
4
3
2
1
15
16
14
13
12
11
10
Arc chamber
Shunt coil
Under voltage release
Secondary terminal
Delivery handle
Operating mechanism
Basic device
Intelligent controller
Reset button
Opening button
Closing button
Cover
Auxiliary contact
Closing coil
Charing handle
Motor operator

Section 3: Circuit breaker installation
8 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Section 3: Circuit breaker installation
Drawout circuit breaker installation
1. Remove the basic device of the circuit breaker (see lever-out
operation for more details)
2. Mount the circuit breaker into the cabinet:
Circuit Breaker
IZM6
Hexagon head bolt
GB5783-
Nut
GB6170-
Washer
GB97 GB93-
IZM61 M10×30 M10 Φ10
IZM65 M12×30 M12 Φ12
IZM67 M12×30 M12 Φ12
otes:N See below diagram for detailed mounting methods and locations.
3. Lever the basic device of the circuit breaker into the cassette
(see circuit breaker lever-in operation for more details)
Fixed circuit breaker installation
Place the circuit breaker into the cabinet.
Circuit Breaker
IZM6
Hexagon head bolt
GB5783-
Nut
GB6170-
Washer
GB97 GB93-
IZM61 M10×30 M10 Φ10
IZM65 M12×30 M12 Φ12
IZM67 M12×30 M12 Φ12
otes:N See below diagram for detailed mounting methods and locations.
Hexagon
head bolt
Washer
Nut
Nut
Washer
Hexagon
head bolt
Ground terminal wiring
Make sure to wipe and clean the connection points with a
rag prior to grounding the drawout and fixed circuit breakers.
Connect the PE conductor to the grounding bar of the switch
cabinet with M12 screws. The cross-sectional area of the conduc-
tor is as follows:
Cross section of phase
conductor (mm²)
Corresponding protective conductor (minimum
cross-sectional area of PE wire (mm²)
35<S≤400 S/2
400<S≤800 200
S>800 S/4

Section 3: Circuit breaker installation
9IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Power Loss (with Ambient Temperature at +40°C)
Power loss is the total power consumption measured when the frame rating current In passes through the circuit breaker.
Power loss (W)
Breaker model Fixed type Drawout type
IZM61 1600A frame 123.5 331.5
IZM65 2500A frame 356.8 823.4
IZM67 4000A frame 486.7 856.8
Derating factors
When the working ambient temperature exceeds +40°C, the continuous current carrying capacity can be corrected with reference to the following table:
Model Rated current (A) +40°C +45°C +50°C +55°C +60°C +65°C +70°C
IZM61 1600A frame 400-1250 1 1 1 1 1 1 1
1600 1 1 1 0.95 0.93 0.87 0.8
IZM65 2500A frame 400-2000 1 1 1 1 1 1 1
2500 1 1 1 1 0.99 0.94 0.88
IZM67 4000A frame 2000-2500 1 1 1 1 1 1 1
3200 1 1 1 0.95 0.92 0.89 0.85
4000 1 0.95 0.92 0.89 0.85 0.82 0.8
When the circuit breaker is installed at higher altitudes than 2000m, its electrical performance can be corrected with reference to the following table:
Altitude (m) 2000 3000 4000 4500 5000
Power frequency voltage withstand (V) 5000 4500 3500 3000 2900
Operational voltage 440/690 440/690 440/690 440/690 440/690
Short-circuit breaking capacity correction factor 1 0.83 0.71 0.66 0.63
Operating current correction factor IZM61 1600A frame 1 0.98 0.93 0.9 0.87
IZM65 2500A frame 1 1 1 1 0.97
IZM67 4000A frame 1 0.93 0.88 0.85 0.82
The derating correction factor is only for the maximum current in the frame
Recommended bus bar specifications
Rated frame current Inm (A) Rated current In(A)
Recommended bus bar dimensions
No. of bars
Horizontal outgoing Vertical outgoing Dimension (mm × mm)
IZM61 1600A frame 200 2 / 50×5
400 2 / 50×5
630 2 / 50×6
800 2 / 50×10
1000 2 / 50×10
1250 3 / 50×8
1600 3 / 50×10
IZM65 2500A frame 400 2 / 80×5
630 2 / 80×5
800 2 / 80×5
1000 2 / 80×5
1250 3 / 80×5
1600 2 / 80×10
2000 3 / 80×10
2500 4 / 80×10
IZM67 4000A frame 2000 3 2 100×5
2500 2 2 100×10
3200 3 3 100×10
4000 5 4 100×10
The copper bar specifications used in the table are when the circuit breaker is at the ambient temperature of up to 40 °C and installed in an open area, in accordance with the conventional thermal conditions in
GB14048.2.

Section 4: Accessory
10 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Section 4: Accessory
Closing release
After charging, the closing release enables the energy stored in
the operating mechanism to release instantaneously, allowing the
circuit breaker to close quickly.
When used with the LCS, the closing release can operate on the
circuit breaker only when the charging spring is fully charged and
the tripping latch is in the re-trip (non-tripping) position. If both
conditions are not met, the closing signal will be invalid until the
signal is removed and re-applied.
• IZM61/65/67
Power loss table of the closing release
Frame Insulation
voltage
(Ui)
Rated control
voltage Us(V)
Actuating
voltage
Pickup
transient
current
Pickup
transient
power
1600A 400V AC230/DC220 (0.85~1.1) Us2.2A 500W
AC400 (0.85~1.1) Us1.5A 600VA
AC110/DC110 (0.85~1.1) Us2.5A 270W
AC48/DC48 (0.85~1.1) Us4A 190W
AC24/DC24 (0.85~1.1) Us2.5A 60W
2500A
4000A
400V AC230/DC220 (0.85~1.1) Us2.5A 550W
AC400 (0.85~1.1) Us2.1A 780VA
AC110/DC110 (0.85~1.1) Us5.2A 550W
AC48/DC48 (0.85~1.1) Us2.1A 360W
AC24/DC24 (0.85~1.1) Us5.1A 264W
Shunt release
The shunt release enables the circuit breaker to open remotely.
• IZM61/65/67
GB9074.8 M4x10
IZM61
*%Ų
*%Ų
GB29.2 2×M4×62
IZM65/67
*%Ų
*%Ų
*%0
*%0[
,=0
,=0
Power loss table of the shunt release
Frame Insulation
voltage
(Ui)
Rated control
voltage Us(V)
Actuating
voltage
Pickup
transient
current
Pickup
transient
power
1600A 400V AC230/DC220 (0.85~1.1) Us2.2A 500W
AC400 (0.85~1.1) Us1.5A 600VA
AC110/DC110 (0.85~1.1) Us2.5A 270W
AC48/DC48 (0.85~1.1) Us4A 190W
AC24/DC24 (0.85~1.1) Us2.5A 60W
2500A
4000A
400V AC230/DC220 (0.85~1.1) Us2.5A 550W
AC400 (0.85~1.1) Us2.1A 780VA
AC110/DC110 (0.85~1.1) Us5.2A 550W
AC48/DC48 (0.85~1.1) Us2.1A 360W
AC24/DC24 (0.85~1.1) Us5.1A 264W
Motor operator
The circuit breaker offers motor charging and automatic recharg-
ing functions (manual charging is also available for the circuit
breaker)
• IZM61/65/67
Rated control voltage
Us(V)
AC24/
DC24
AC48/
DC48
AC110/
DC110
AC230/
DC220
AC400
Model code M5 M4 M3 M1 M2
Actuating voltage (0.85~1.1) Us
Power loss IZM61 80W 80W 80W 80VA 80VA
IZM65/67 150W 150W 150W 150VA 150VA
Charging time (s) 5s 5s 5s 5s 5s
Auxiliary contact
GB819 2×M4×10
GB5783 M6×60
*%Ų
*%Ų
M5x12
IZM61
IZM65/67

Section 4: Accessory
11IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Internal auxiliary contact
• IZM61/65/67
External auxiliary contact
For IZM61/65/67 series circuit breakers, external auxiliary con-
tacts are needed when there are more than 4 open and 4 closed
auxil-iary contacts.
External auxiliary contact terminal numbers
Rated operating
voltage Ue(V)
Rated control
capacity
Conventional
thermal
current Ith (A)
Auxiliary contact AC400 800VA 6
AC230
DC220 300W
DC110
Undervoltage and Novoltage releases
GB9074.8 M4X10
IZM61 IZM65/67
GB9074.8 M4X16
62 64 65 67 68 70 71 73 74 76 77 79 80 82 83 85 86 88 89 91
63 66 69 72 75 78 81 84 87 90
Undervoltage
• IZM61/65/67
In areas prone to thunderstorms or in power grids with unstable
power supply voltage, it is recommended to use under voltage
trip units with time delay functions, to prevent the circuit breaker
from tripping due to short-time voltage drop. The delay time can
be selected usually from 0.3s,0.5s,0.7s,1s, 3s, 5s, to 10s by users.
For special requirements on the delay time, please contact Eaton.
Rated operating voltage Ue(V)
AC24/
DC24
AC48/
DC48
AC110/
DC110
AC230/
DC220 AC400
Actuating voltage (V) (0.35-0.7) Ue
Reliable closing voltage (V) (0.85-1.1) Ue
Reliable no-closing voltage (V) ≤0.35 Ue
Pickup power IZM61 263W 331W 773W 570W 408W
IZM65/67 228W 269W 220W 456W 508W
Maintaining
power
IZM61 2.2W 2.62W 2.8W 4W 3.5W
IZM65/67 5.7W 6.2W 8.6W 4.2W 6.6W
GB9074.8 M4x10
GB29.2 2×M4×62
*%Ų
*%Ų
IZM61
IZM65/67

Section 4: Accessory
12 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Novoltage releases
• IZM61/65/67
Rated operational voltage Ue(V)
AC24/
DC24
AC110/
DC110
AC230/
DC220 AC400
Actuating voltage (V) (0.1-0.35) Ue
Reliable closing voltage (V) (0.85-1.1) Ue
Reliable no-closing voltage (V) ≤0.35 Ue
Pickup power IZM61 / / 200W 220W
IZM65/67 140W 117W 81W 200W
Maintaining
power
IZM61 / / 3.5W 3.3W
IZM65/67 2.9W 2.5W 2.5W 2W
Interphase partition
The interphase partition is mounted vertically between the wir-
ing boards in the fixed section of the drawout circuit breaker, to
increase the insulation strength of the busbar connection.
Counter
The counter calculates the number of operations, which can be
read on the front panel. It is compatible with manual and electri-
cal operation functions.
Counter
position
OFF position lock
The off position lock can secure the opening button of the circuit
breaker in its depressed position. Once the lock is selected by
users, Eaton shall install it in the factory.
How to use:
One lock and one key: A circuit breaker is equipped with one lock
and one key. The circuit breaker is not allowed to close in the
locked state;
Three locks and two keys: Three circuit breakers are equipped
with three identical locks and two keys, and only two circuit
breakers are allowed to close.
Position cell switch
Three sets of switches are available to indicate the current posi-
tion of the circuit breaker (Connected, Test, Disconnected). The
corresponding switch will be switched on when the circuit break-
er is in a certain position.
GB9074.8 2×M4×9
GB9074.8 M4X10
IZM61
IZM65/67
Position indication
mounted inside
the switch

Section 4: Accessory
13IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Door escutcheon
The door escutcheon is mounted on the door, and features a
protection level up to IP40. The circuit breaker offers an IP20 pro-
tection level when mounted separately. Corresponding door
escutcheon is available for both fixed and drawout circuit break-
ers.
Power module
The power module is equipped as standard and shipped with the
product. The power module is not installed on the circuit breaker
and can be installed on the standard rail (TH35-75) of the panel.
Input voltage Output voltage
Wide-voltage power supply module 85-264VAC, 120-370VDC 24VDC, 1.5A
89
58.5
35
External neutral current transformer
The three-pole circuit breaker is selected, and an external neutral
current transformer is required to do residual current grounding
protection.
During mounting, be cautious of the following:
1. Twisted-pair wires are available on the external neutral
current transformer, with Code No. 23 and 24 on them to
connect corresponding secondary terminals. Simply follow the
code num¬bers on the conductors to connect to the
secondary terminals.
Mechanical interlock
Mechanical interlock mounting instructions
To mount the steel cable interlock for two circuit breakers
mount¬ed horizontally, follow below steps:
1. Lever out and remove the basic device of the circuit breaker
from its respective cassette;
2. Fasten the interlocking pieces with screws onto the
desig¬nated position on the right side of the cassette;
3. Insert two steel cables, one end sleeved onto the bolts of the
interlocking pieces, and the other end secured with a clip, to
ensure that the steel cable is tightened properly (as shown in
the figure below);
4. Lever the basic device back into the cassette, and place the
circuit breaker in the Connect position;
SOURCE
LOAD
27.5
110
71
150
52.5
70
31
20
M5
M12
N1
N2
25 25 25
100
94
20
97
12.5
11
40
M5
SOURCE
LOAD
IZM61 transformer dimensions
IZM65/67 transformer dimensions

Section 5: IZM61/65/67 accessory installation
14 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Section 5: IZM61/65/67 accessory installation
IZM61 shunt release
WARNING
(1) Only qualified electrical personnel should be permitted to
work on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
Section 1: General information
The shunt release opens the circuit breaker when energized.
Tools required
• Phillips screwdriver
Kit parts identification
• Shunt release (1)
Section 2: Installing the shunt release
Follow below steps for installation:
Step 1: Remove the mounting screws from the circuit breaker
panel with the Phillips screwdriver. Pull down the charging handle
(by an approx. 45° angle) to remove the cover.
Screw
Figure 1. Step 1
5. With both circuit breakers in the Open state, close Circuit
Breaker 1, and Lever 11 will turn counterclockwise to a cer-
tain angle. At this point, Lever 22 also turns counterclockwise
to a certain angle, due to the force of Steel Cable 2. Now, the
tripping shaft of Circuit Breaker 2 is pressed down - adjust the
tightness of the steel cable with Regulating piece 2;
6. With both circuit breakers in the Open state, close Circuit
Breaker 2, and Lever 21 will turn counterclockwise to a cer-
tain angle. At this point, Lever 12 also turns counterclockwise
to a certain angle, due to the force of Steel Cable 1. Now, the
trip¬ping shaft of Circuit Breaker 1 is pressed down - adjust
the tightness of the steel cable with Regulating Piece 1;
7. Verify whether the devices are properly mounted: First close
any circuit breaker and then try to close the other one. Failure
to close indicates the mounting is properly done.
Circuit breaker 1 Circuit breaker 2
00
01
10
otes:N 1 = Closed, 0 = Open
Circuit breaker 1
interlocking pieces
Lever 12
Lever 11
Regulating part 1
Steel cable 1
Steel cable 2
clip 2
clip 1
Regulating part 2
Lever 22
Lever 21
Circuit breaker 2
interlocking pieces
Rȱ100
Note: The steel cable is too long and can be wound into the
shape shown above, but the sum of all bending angles can-
not exceed 720°

Section 5: IZM61/65/67 accessory installation
15IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Step 2: Mount the shunt release to the right inner side of the
manual operating mechanism cover, secure it with the pressing
plate (the round hole in the pressing plate should be aligned
with the round convex surface of the release) and assemble the
screws.
Screw
Pressing plate
Figure 2. Step 2
Step 3: Connect the two conductors of the shunt release to
Terminal 36 and 37 respectively.
Step 4: Put the cover back on.
IZM61 closing release
WARNING
(1) Only qualified electrical personnel should be permitted to
work on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
Section 1: General information
Upon the completion of charging, the closing release enables the
energy stored within the operating mechanism to be released
instantaneously, allowing the circuit breaker to close.
Tools required
• Phillips screwdriver
Kit parts identification
• Closing release (1)
Section 2: Installing the closing release
Follow below steps for installation:
Step 1: Remove the mounting screws from the circuit breaker
panel with the Phillips screwdriver. Pull down the charging handle
(by an approx. 45° angle) to remove the cover.
Screw
Figure 1. Step 1

Section 5: IZM61/65/67 accessory installation
16 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Step 2: Mount the closing release to the right outer side of the
manual operating mechanism cover, secure it with the pressing
plate (the round hole in the pressing plate should be aligned
with the round convex surface of the release) and assemble the
screws.
Screw Pressing plate
Figure 2. Step 2
Step 3: Connect the two conductors of the closing release to
Terminal 38 and 39 respectively.
Step 4: Put the cover back on.
IZM61 under (no) voltage release
WARNING
(1) Only qualified electrical personnel should be permitted to
work on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
Section 1: General information
The under voltage releases (UVR) will cause the circuit breaker
to open when its supply voltage drops to 35 to 70% of the rated
voltage. If the UVR’s supply voltage does not reach 85% of the
rated voltage, the circuit breaker cannot be closed electrically or
manually.
The no voltage releases (NVR) will cause the circuit breaker to
open when its supply voltage drops to 10 to 35% of the rated
voltage. If the NVR’s supply voltage does not reach 85% of the
rated voltage, the circuit breaker cannot be closed electrically or
manually.
Tools required
• Phillips screwdriver
Kit parts identification
• Under (No) voltage release (1)
Section 2: Installing the under (no) voltage release
Follow below steps for installation:
Step 1: Remove the mounting screws from the circuit breaker
panel with the Phillips screwdriver. Pull down the charging handle
(by an approx. 45° angle) to remove the cover.
Screw
Figure 1. Step 1

Section 5: IZM61/65/67 accessory installation
17IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Step 2: Mount the under (no) voltage release to the left side of
the manual operating mechanism cover, secure it with the press-
ing plate (the round hole in the pressing plate should be aligned
with the round convex surface of the release) and assemble the
screws.
Pressing plate
Screw
Figure 2. Step 2
Step 3: Connect the two conductors of the under (no) voltage
release to Terminal 34 and 35 respectively.
Step 4: Put the cover back on.
IZM61 motor operator
WARNING
(1) Only qualified electrical personnel should be permitted to
work on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
Section 1: General information
The circuit breaker offers motor charging and automatic recharg-
ing functions.
Tools required
• Phillips screwdriver
Kit parts identification
• Motor operator (1)
• Mounting plate (1)
• Screws M4×10 (1)
• Screws M5×12 (1)
Section 2: Installing the motor operator
Follow below steps for installation:
Step 1: Remove the mounting screws from the circuit breaker
panel with the Phillips screwdriver. Pull down the charging handle
(by an approx. 45° angle) to remove the cover.
Screw
Figure 1. Step 1

Section 5: IZM61/65/67 accessory installation
18 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Step 2: Rotate the V-slot angle of the motor operator to align with
the V-shaft of the operating mechanism, and mount it in parallel
to the operating mechanism.
V-slot
Figure 2. Step 2
V-slot
Figure 3. Step 2
Step 3: As shown in the figure, secure the upper end of the
motor operator with M4×10 cross countersunk screws (2), then
the lower end with the mounting plate and M5×12 screws.
Screw M4×10
Mounting plate
Screw M5×12
Figure 4. Step 3
Step 4: Connect the three conductors of the motor operator to
Terminal 40, 41 and 42 respectively.
Step 5: Put the cover back on.
IZM61 position cell switch
WARNING
(1) Only qualified electrical personnel should be permitted to
work on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
Section 1: General information
Three sets of switches are available to indicate separately
the current position of the circuit breaker (Connected, Test,
Disconnected). The corresponding switch will be switched on
when the circuit breaker is in a certain position.
Tools required
• Phillips screwdriver
Kit parts identification
• Position cell switch (1)
• Label (1)
• Screws M4×8 (5)
• Rail 60mm
Section 2: Installing the position cell switch
Follow below steps for installation:
Step 1: First, lever out the basic device to the Disconnected posi-
tion for removal.
Step 2: Place the position cell switch onto the left side panel of
the cassette, and secure it with M4×8 screws. Attach the label
above the measuring position after mounting.
Screw M4×8
Figure 1. Step 2

Section 5: IZM61/65/67 accessory installation
19IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
W6 W5
W4 W3
W2 W1
DISCONNECT
TEST
CONNECT
16A 380VAC
0.3A 250VDC
250VAC
Figure 2. Step 2 label
Step 3: Mount the rail and secure it with M4×8 screws.
Screw M4×8
Figure 3. Step 3
Step 4: Then connect the position cell switch wires to the termi-
nals and fasteners by number, and mount terminal number plate.
Terminal fixed block
Wiring terminal
Figure 4. Step 4
Step 5: Finally, put the basic device back into the cassette, and
measure whether the corresponding switch at the three positions
can be properly switched on.
IZM61 OFF-position safety lock
WARNING
(1) Only qualified electrical personnel should be permitted to
work on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
Section 1: General information
1. When without a key, the circuit breaker will be in the
"Disconnected" state and cannot be closed.
2. When the key is in the "ON" position – that is, the key is inside
the lock cylinder - and turned, the circuit breaker will offer full
functions.
3. The key cannot be removed when the circuit breaker is in
"ON" (Closed) state.
NOTICE
To remove the key, first press the breaker’s "OFF" button; then
turn the key by 90 degrees counterclockwise.
Tools required
• Phillips screwdriver
• Drill Ф25
Kit parts identification
• OFF-position safety lock (1)
• Screws M4×10 (1)
Section 2: Installing the OFF-position safety lock
Follow below steps for installation:
Step 1: Remove the mounting screws from the circuit breaker
panel with the Phillips screwdriver. Pull down the charging handle
(by an approx. 45° angle) to remove the cover.
Screw
Figure 1. Step 1

Section 5: IZM61/65/67 accessory installation
20 IZM6 Series Air Circuit Breaker Instruction Manual MN013019EN March 2023 www.eaton.com.cn
Step 2: Place the OFF-position safety lock onto the mechanism
cover and secure it with the M4×10 screw (the lock should be in
the unlocked state during mounting).
Screw M4×10
Figure 2. Step 2
Step 3: Make a cutout (Φ25) on the cover according to the cover
outline.
Ø25
Figure 3. Step 3
Step 4: Put the cover back.
IZM61 external auxiliary contact
WARNING
(1) Only qualified electrical personnel should be permitted to
work on the equipment.
(2) Always de-energize primary and secondary circuits if a circuit
breaker cannot be removed to a safe work location.
(3) Drawout circuit breakers should be levered (racked) out to the
disconnect position.
(4) All circuit breakers should be switched to the off position and
mechanism springs discharged.
Failure to follow these steps for all procedures described in this
instruction leaflet could result in death, bodily injury, or property
damage.
Section 1: General information
Auxiliary contacts offer remote indication of whether the circuit
breaker is in OFF or ON state. External auxiliary contacts are
needed if there are no sufficient internal auxiliary contacts, with a
maximum number of 12 ONs and 12 OFFs. Each auxiliary contact
has 1 NO contact (Contact "A") and 1 NC contact (Contact "B")
with commons.
Tools required
• Phillips screwdriver
• Knife
External auxiliary contact installation for drawout
products
Kit parts identification
• Auxiliary contact assembly (1)
• Rail (1)
• Label (1)
• Pressing plate (1)
• Screw M4×12 (1)
• Screw M4×8 (4)
Section 2: Installing the external auxiliary contact
Follow below steps for installation:
Step 1: First, lever out the basic device to the Disconnected posi-
tion for removal.
Step 2: Remove the basic device after it is levered out, and
remove the cover. Then, mount the pressing plate on the right
side of the operating mechanism shaft (with M4×8 screws).
Screw M4×12
Pressing plate
Figure 1. Step 2