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
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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