Noark Ex9M Series User manual

NOARK Electric（Shanghai）Co.,Ltd. Address: No. 3857, Sixian Road,
Songjiang District, Shanghai,
P.R.China, 201614
http://na.noark-electric.com
Printed with environmentally-friendly paper
The expression right of the instructions are owned by NOARK.
Moulded Case Circuit Breaker
Series
125A

CONTENTS
Features
Modular 8
Bearing type 10
Current limiting type 11
“Compact, fast, exible” 12
Environmental friendly 14
Operating conditions 15
Model Selection and Ordering
Information
Models 16
Reference table for accessory selection 20
Functions
Parameter table 24
AC power distribution protection 31
Motor protection 35
Switch disconnector 41
Residual current protection 42
Selective protection 43
DC power distribution protection 44
Accessories
Overview 46
Internal accessories 47
Connecting accessories 52
External accessories 54
Insulation accessories 59
Curves and Parameters
Characteristic curve of thermal magnetic type release 60
Characteristic curve of electromagnetic type release 64
Characteristic curve of distribution protection electronic type release 66
Characteristic curve of motor protection electronic type release 67
Derating curve and parameters 68
Power consumption table 71
Cascade protection 72
Selective protection 74
Parameter table of connecting cables 76
Dimensions and installation
Outline dimensions of xed type 77
Front connection of xed type 86
Back connection of xed type 89
DIN rail installation (adapter included) 95
Plug-in type connection 96
Withdrawable type connection 100
Manual operating mechnism 102
Motor-driven operating mechanism 107
Wires 109

Noark Electric is a global company specialized in the development, manufacture and sales of high-end intelligent electrical systems. With more than 1,200 employees
worldwide and among which 18% are R&D technicians, we have 3 R&D centers, 3 logistics bases and 100 sales branches around the world. The Asia Pacific
headquarters of Noark is located in Shanghai, China, with 17 branches in China.
Since its establishment more than ten years ago, Noark has successively obtained the authorized certifications from American UL, Dutch KEMA, German TÜV, and
Lloyd's. All of our products have met rigorous testing requirements stipulated by GB and IEC standards and are widely used in more than 40 countries and regions in
Europe, North America and Asia Pacific, serving nearly 1,000 key projects.
Noark is committed to providing safe, reliable and customizable products, solutions and high quality services to intelligent power, construction
engineering, assorted mechanization, photovoltaic new energy, data center and other industries. So far, we have provided intelligent electrical solutions
for hundreds of domestic customers such as Sinopec, China Railway Engineering Corporation, Bao Steel, KONE Elevator and have been highly
recognized by the professional market. Based on the Group's rich industry experience and strong R&D capabilities, Noark integrates and optimizes
superior resources like sales channels and service platforms to drive smart manufacturing through innovation and is committed to be a leader in the
high-end market of Chinese low voltage electrical industry.
Company Introduction
Quality Guarantee
Adopt a high-quality product guarantee system that fully demonstrates the advantages of Noark products, with outstanding design, carefully selected
materials, precision manufacturing technology and a strict inspection system, to guarantee our products meet the requirements of international quality
standards and providing assurance for the reliable operation of your electrical system.
Outstanding design
Global R&D centers
Over 1,500 quality and reliable raw material warehouses worldwide; Over 500 sets of high precision inspection equipment
46 indicators of performance inspections and environment tests
Hexagon three coordinate measuring machine
More than 80% of the recyclable materials.
Over 80 patents The Red Dot Award
Precision manufacturing technology
Lloyd's ISO 9001 GB and IEC standards
Carefully selected materials Strict inspection system

Comprehensive Protections
Ex9M series power distribution circuit breaker is a switching device that not only can
connect, carry and disconnect currents under normal circuit conditions, but also can
connect, carry (for a period of time) and disconnect currents under specied abnormal
circuit conditions (such as overload or short circuit).
Ex9M series motor protection circuit breaker is applicable to motor feeder circuit
solutions with three elements or two elements. It is used with AC contactor and
thermal relay to guarantee the normal operation of motor and provide isolation,
connection and disconnection, short circuit protection, overload protection, phase
unbalance and phase failure protection.
Ex9ML series residual current (leakage) protection module provides trip protection by
detecting residual current of non-zero vector sum of multiple phases (including neutral
line) and sending trip signal in low voltage power distribution circuit.
Used with circuit breaker, the Ex9M1SD, Ex9M2SD, Ex9M3SD, Ex9M4SD, Ex9M5SD
and Ex9M6SD act as disconnecting switches to provide an obvious discontinuity point
in the circuit.
Power distribution protection
Motor protection
Residual current protection
Switch disconnector
Reliable Quality Assurance
Applicable Standards
AC moulded case circuit breaker DC moulded case circuit breaker
International standards National standards
Product standards
IEC 60947-1 (General) GB/T 14048.1
IEC 60947-2 (Circuit breaker) GB/T 14048.2
IEC 60947-3 (Switch, disconnector) GB/T 14048.3
IEC 60947-4 (Motor starter) GB/T 14048.4
Extreme environment test standards
IEC 60068-2-1 (Low temperature) GB/T 2423.1
IEC 60068-2-2 (Dry heat) GB/T 2423.2
IEC 60068-2-11 (Salt fog) GB/T 2423.17
IEC 60068-2-30 (Damp heat) GB/T 2423.4
Ultimate Breaking Capacity
There are multiple breaking capacities (Icu=Ics)
available for each model of circuit breaker, meeting
various protection needs of customers:
Standard applications: standard type (S and N)
Used in residential houses, buildings, public
buildings and industrial plants
Special applications: current limiting type (P)
Used in heavy industry and special industry
High performance applications: high
breaking capacity type (Q and H)
Used in industrial production lines and key
electric equipment
DC applications: DC breaking type (B-H)
Used in photovoltaic power generation
systems, DC power transmission and
distribution systems
150kA
100kA
70kA
50kA
36kA
Ex9M1Ex9M2
Ex9M3 Ex9M4Ex9M5 Ex9M6
100kA
70kA
50kA
36kA
25kA
Ex9MD1
Ex9MD2
Ex9MD3
Ex9MD4
Ex9MD5
Ex9MD6
B
SNQHP
SNQH
China Compulsory
Certification
IECEE for Mutual Recognition
of Test Certificates for
Electrical Equipment
European
Community Safety
Certification
certificate

98
Modular
No. Name Abbreviation
1Auxiliary contact AX
2Alarm contact AL
3Undervoltage release UVT
4 Shunt release SHT
5
Closing
electromagnet (Only
applicable to Ex9M6)
XF
6Residual current
protection module Ex9ML
7Thermomagnetic
release TM
8 Electronic release SU20
9 Direct rotary handle RHD
10 Extended rotary
handle ERH
11 Long handle (Only
applicable to Ex9M6) LHD
12 Motor-driven
operating mechanism MOD
13 Plug-in base PIA
14 Front connection
plate JP
15 Rear connection
plate RCP
16 Handle locking
device KLK
17 Mechanical interlock MIT
18 Short terminal cover TCV
19 Interphase barrier PHS
20 Long terminal cover TCE
21 Draw-out base DOB
22 Din-rail adapter DRA
23 Communication
module COM
24 Battery box BAB
13
8
3
4
5
19
67
20 16
910
12
14
15
17
18
21
22
23
24
11
Features
FeaturesFeatures
Modular: All the modules are assembled together according to a certain method to provide all
the functions that are required for a complete system.
Scalability: Complete accessories available, providing all kinds of extended functions.

1110
Contact electromagnetic
field distribution
Magnetic quenching principle
Moving
contact
Fixed
contact
Arc is pushed into
arc extinguish
chamber by
magneto-mechanical
effect
Current limit type
Current limiting means to keep the short circuit current in the circuit being protected lower than
expected value. With the protection of current limit type Ex9M circuit breaker, the peak short
circuit current value and I2t energy will be signicantly lowered in case of short circuit.
Current limiting can reduce the heat effect, electrodynamic effect and electromagnetic effect
of short circuit current. It can also reduce the damage caused by short circuit current to lines,
equipment and circuit breaker.
If the upstream circuit breaker is equipped with current limiting capability, which can lower the
requirements for the breaking capacity of downstream circuit breaker and achieving cascade
(backup) protection
If both the upstream and downstream circuit breakers are equipped with current limiting
capability, the system can provide selective protection, in which case only the closest circuit
breaker will be disconnected if fault occurs.
U type xed contact design
The unique U type contact enables pre-breaking technology:
The pre-breaking technology means when the short circuit current goes through the contact
system, the electric force generated on the U type xed contact and the moving contact are
repulsive; the bigger the current, the bigger the force, and the force is generated at the same
time as the short circuit current; before release, the electric repulsion force can break the xed
and the moving contacts, increasing the equivalent resistance between them by extending the
arc, so that the increase of short circuit current is suppressed.
Double breaking point design
The unique double breaking point design can increase instantaneous arc resistance and arc
voltage, and signicant lower current increase rate, which enhances the current limiting effect
of the pre-breaking technology; it can improve safety by lowering the harm and damage caused
by short circuit current to equipment and circuit; it also enables cascade which can reduce the
cost for downstream protection equipment.
Zero ashover
Electromagnetic eld simulation analysis ensures the arc extinguishing capability of the circuit
breaker so as to achieve zero ashover.
We use comprehensive and advanced electromagnetic eld software simulation technology
for the design of arc extinguish chamber and the fixed and moving contacts of the circuit
breaker, to make sure the generated arc is blown into the arc extinguish chamber instantly. By
using magnetic quenching method, we signicantly improved the arc extinguishing capability
of the circuit breaker and further enhanced it’s current limiting capability.
Ｉ
Ｔ
Expected peak
Expected short
circuit current
Actual peak
Actual short circuit current
after current limiting
Energy after current
limiting
Ｉ
Ｉ
U type rejection circuit,
enhanced repulsion
force for fast breaking
of contact
Upper xed contact
Force F1
Moving
contact
Lower xed
contact
Force F2
Bearing type
The operating mechanism is a key component of the circuit breaker, the key technical parameters
and performance of the circuit breaker is closely related to the operating mechanism:
Rotary shaft is a key component of the circuit breaker:
Mechanical life (times)
Ex9M – a durable high-performance circuit breaker:
Service life of the circuit breaker
Breaking capacity of the circuit breaker
Breaking speed of the circuit breaker
Operating force of the circuit breaker
Operation reliability of the circuit breaker
It is a rotary part inside the circuit breaker, which will operate tens of thousands of times
It guarantees the synchronized disconnecting and connecting of the three phases (or four phases)
of the circuit breaker
The wear of the rotary shaft will affect the performance of other parts which can increase risks
Extend the service life of circuit breaker by times
2 times of standard, decrease the frequency for
replacement and cost for maintenance
Signicantly improve the reliability of the product
The use of accessories is not affected by
operation times
Reliably improved breaking capacity: ensure Ics=Icu , without derating in reverse wire entering application.
Increase breaking speed by times: breaking time < 2ms
Signicantly decrease operating force: less than 3/5 of similar products
The friction between the rotary shaft of a traditional circuit breaker and its adjacent parts is
sliding friction, which can generate high frictional resistance and therefore cause larger wear to
the rotary shaft. This can be the biggest issue that limits the breaking speed and the service life
of the circuit breaker.
Noark developed a new type of rotary shaft that generate rolling friction which eliminated all
the issues that created by sliding friction and thus signicantly improved the performance of the
circuit breaker.
Manual operation of Ex9M: easy and exible
Electric operation of Ex9M: lower power consumption of motor
Model
Operating force
Ex9M1 Ex9M2 Ex9M3 Ex9M4 Ex9M5 Ex9M6
3p 4p 3p 4p 3p 4p 3p 4p 3p 4p 3p 4p
Making force (N) 44 46 55 82 120 160 160 200 160 200 250 255
Breaking force (N) 24 24 39 55 110 150 150 195 150 195 170 175
Re-trip force (N) 36 38 36 54 150 220 165 215 165 215 260 265
Electrical life (times)
FeaturesFeatures
8000
4000
4000
15000
2500
6000
3000
2000
Ex9M6
Ex9M5
Ex9M4
Ex9M3
Ex9M2
Ex9M1
Ex9M6
Ex9M5
Ex9M4
Ex9M3
Ex9M2
Ex9M1

1312
Compact, fast, exible
The Ex9M circuit breakers use compact and light-weighted design for easy installation
and space saving, without compromising their excellent performance.
A compact and delicate moulded case circuit breaker - Ex9M1 (160A)
3 pole dimension: 90mm×140mm×81.6mm (W×H×D)
The compact feature of Ex9M circuit breakers does not change with the increase of
frame size current:
The Ex9M circuit breakers use air blow principle to increase the breaking speed of the circuit
breaker, which improves both the breaking capacity and the current limiting capability of the
circuit breakers.
When the circuit breaker cuts off short circuit current, a large amount of gases with high
temperature and pressure will be generated in the arc extinguishing chamber due to arcing; the
larger the short circuit current, the bigger energy these gases contains.
The design of the Ex9M circuit breakers takes these gases with high temperature and pressure
into consideration, and uses unique arc extinguishing chamber and fast operating mechanism
to achieve fast release.
The fast operating mechanism of Ex9M circuit breakers ensures that the moving and fixing
contacts are disconnected before the instantaneous release operates. In the meantime, the
bigger the short circuit current, the more energy the fast operating mechanism obtains, which
enhances release capacity of the circuit breaker so it can cut off higher short circuit current:
The maximum breaking short circuit current of Ex9M series circuit breakers is 150kA
The minimum release time of Ex9M series circuit breakers is <2ms
Model Frame size rated current (A) Width (mm) Height (mm) Depth (mm)
Ex9M1 (3P) 160 90 140 81.6
Ex9M2 (3P) 250 105 157 91.5
Ex9M3 (3P) 400/630 140 255 118.5
Ex9M4 (3P) 630 195 300 133.5
Ex9M5 (3P) 800 195 300 133.5
Ex9M6 (3P) 1600 210 286 167
The unique zero ashover design of the Ex9M circuit breakers enables user to save
installation space effectively.
Patented fast operation
Ex9M1/2: ≥50
Ex9M3~6: ≥100
Ex9M1/2: ≥50
Ex9M3~6: ≥100
The Ex9M circuit breakers can be installed according to the actual needs inside the cabinet.
The circuit breakers can operate normally no matter which installation method is used.
The Ex9M circuit breakers (except residual current protection circuit breakers) support reverse
incoming method. Due to its unique design, there is no need to derate the circuit breaker if
reverse incoming method is used, so that users can truly enjoy the benets brought by reverse
incoming method.
FeaturesFeatures
Compact Flexible
Fast
Zero ashover
Zero ashover
Zero ashover
Zero ashover
Installation method
Incoming method

1514
Environmental friendly
Design/manufacturing
Operation
Recycle
Transportation
The Ex9M circuit breakers comply with the requirements of RoHS
and are manufactured according to ISO 14001 standards.
Low heat generation and power consumption during operation, with
less impact on surroundings.
Over 80% of the materials are recyclable after the service life is over.
With sustainability in mind, we use environmental friendly materials
during transportation.
Operation conditions
Temperature
Altitude
Humidity:
Pollution class
Derating
The operating and storage temperature of Ex9M circuit breakers is -40 °C~+70 °C (the operating
temperature for basic type (dial switch) electric circuit breakers is -35 °C ~+70 °C, and the operating
temperature for standard type (LCD) electronic circuit breakers is -25 °C ~+70 °C), with average
temperature within 24h below +35 °C. User should derate the circuit breaker or take temperature
compensation methods if the ambient temperature is -40 °C ~+70 °C, please see Curves and
Parameters for detailed coefcient.
Normally, the product should not be installed above 2000m
If user has to install the product above 2000m, it should derate the circuit breaker
according to the coefcient table in Curves and Parameters or consult Noark.
Conditions for normal operation:
Class 3
The relative humidity should not exceed 50% if the ambient temperature is +40°C; higher
humidity is allowed if the temperature is lower
The average relative humidity of the wettest month is 90%
The impact of surface condensation on the product should be considered
Derating based on temperature change
If the temperature exceeds +40°C, the overload protection feature of Ex9M circuit breakers will
change slightly as the temperature changes. In this case, the set value of Ir on the time/current
curve must be decreased, to ensure the normal operation of the circuit breaker under high
temperature. (Please see Curves and Parameters for details)
Derating based on altitude change
If the altitude is below 2000m, there will be no signicant changes in the performance of Ex9M
circuit breakers. If the altitude is above 2000m, user should consider the change of dielectric
strength and the decrease of ambient temperature. If the breaking capacity remains the same,
the maximum operating voltage of the circuit breaker must be decreased accordingly. (Please
see Curves and Parameters for details)
%rh
km
km/℃
℃
FeaturesFeatures
Halogen element
Asbestos
Cadmium
hlorouorocarbon

1716
Model Selection
Model Selection and Ordering Information
Ex9M moulded case circuit breaker (electromagnetic/thermo-magnetic)
Ex9M
Ex9MD
Product code
Product code
Ex9M:
AC circuit
breaker
Ex9MD:
DC circuit
breaker
3: 400/630A1)
3: 400/630A
4: 630A
4: 630A
5: 800A
5: 800A
6: 1600A
6: 1600A
1: 160A
1: 160A
Frame size code
Frame size
code
2: 250A
2: 250A
1
1
N
N
TM
TM
160
160
3P
3P
Breaking
capacity code
Breaking
capacity code
Release code
Release code
Rated
current (A)
Rated current (A)
Pole number code2)
Pole number
code 1)
N: 50kA
Q: 70kA
H: 100kA
B: 25kA
S: 36kA
TM:
thermo-magnetic power
distribution protection
S: 36kA
N: 50kA
Q: 70kA
H: 100kA
P: 150kA
B: 25kA
S: 36kA
N: 50kA
Q: 70kA
H: 100kA
16,20,25,32
40,50,63,80
100,125,160
16,20,25,32
40,50,63,80
100,125,160
125,160,180
200,225,250
125,160,180
200,225,250
TM:
thermo-magnetic
power distribution
protection
M: electromagnetic
motor protection
TM:
thermo-
magnetic power
distribution
protection
1P
2P
3P
4P4T: protected
N pole, operable
1P
2P
3P
4P
800,1000
1250,1600
800,1000
1250,1600
630,700,800
630,700,800
400,500,630
400,500,630
250,315,350
400,500
250,315,350
400,500
Model Selection example:
Ex9M1N TM 160 3P refers to an Ex9M1 series 3 pole AC moulded case circuit breaker with frame size of 160A,
breaking capacity of 50kA, rated current of 160A, providing thermo-magnetic type power distribution protection.
Note: 1)
The capacity of thermo-magnetic type can be increased to 500A; the capacity of electromagnetic type can
be increased to 630A; the same for DC and residual current protection circuit breakers;
2)
1P/2P is only available for products with 160A and 250A frame size, no electromagnetic motor protection; 1P
product is only available with two types of breaking capacity: S/N.
Note 1): 1P/2P is only available for products with 160A and 250A frame size; 1P product is only available with three types of
breaking capacity: B/S/N.
Note: 1)Only applicable to Ex9M2/3/4/5 electronic type circuit breaker, no motor-driven version for Ex9M6 product; 2) Only applicable to Ex9M6 motor-
driven version electronic circuit breaker.
Ex9M moulded case circuit breaker (electronic type)
Ex9M
Product
code
Ex9M:
AC circuit
breaker
3: 400/630A
4: 630A
5: 800A
6: 1600A
Frame size
code
2: 250A
6HAC230
SU20L 1600 3P MOD
Breaking
capacity code Release code1) Rated
current (A)
Control
voltage2)
Pole number
code
Code of motor-
driven version2)
S: 36kA
N: 50kA
Q: 70kA
H: 100kA
P: 150kA
SU20L:
basic type
electronic power
distribution
protection
SU20S:
standard type
electronic power
distribution
protection
SU20LM:
basic type
electronic motor
protection
1)
SU20SM:
standard type
electronic motor
protection
1)
800
800,1000
1250,1600
630
250,400,630
32,63,100
160,250
3P
4P4T: protected
N pole, operable
Default: manual
version
MOD: motor-
driven version
N: 50kA
Q: 70kA
H: 100kA
Model Selection example:
Ex9M6H SU20L 1600 3P MOD AC230V refers to a Ex9M6 series 3 pole motor-driven operating moulded case circuit breaker with frame size of 1600A,
breaking capacity of 100kA, rated current of 1600A, and control voltage of AC 230V, providing basic type electronic power distribution protection.
Ex9MD DC moulded case circuit breaker (thermo-magnetic type)
Model Selection example:
Ex9MD1N TM 160 3P refers to a Ex9MD1 series 3 pole DC moulded case circuit breaker with frame size of 160A, breaking capacity of 50kA and
rated current of 160A, providing thermo-magnetic type power distribution protection.
Model Selection and Ordering InformationModel Selection and Ordering Information
AC230V
AC400V
DC110V
DC220V

1918
Ex9ML residual current protection circuit breaker/residual current protection module
Ex9MSD switch disconnector
Ex9ML
Product
code
Ex9ML:
residual current
protection
circuit breaker/
residual current
protection
module
1: 160A
2: 250A
3: 400/630A
Frame size
code
2 3P
Default ALT
250 RCD2
Rated
current (A)
Code of residual
current type
Code of special
demand
Pole number
code
Code of residual
operating current
Default: AC
type
A: A type
Default: no
special demand
ALT: release
upon leakage
alarm
ALNT: does not
release upon
leakage alarm
3P
4P4T:
protected
N pole,
operable
Model Selection example:
Ex9ML2N SU20L 250 3P A RCD2 ALT refers to an Ex9ML2 series 3 pole moulded case circuit breaker with frame size of 250A, breaking capacity
of 50kA and rated current of 250A, providing basic type electronic power distribution protection. It is equipped with type A residual current protection
module, with leakage alarm release function and residual current adjustment range of 0.05A-0.2A-0.5A-2A.
Model Selection example:
Ex9M6SD AC 1250 3P MOD AC230V refers to an Ex9M6SD series AC 3 pole motor-driven operating switch disconnector with frame size of 1600A,
operating current of 1250A, and control voltage of AC 230V.
Accessories of Ex9M series products
Short name of accessories Frame size code
Explanations Explanations
Pole number code Special demand code
SHT
Please see table
below
Please see table
below
Default: normal
M: low power consumption
Not needed if no
operating voltage
3P: three poles
4P: four poles
No code if no special
demand;
Develop code according
to special demand.
Reference table for accessory type 1)
Name Abbreviation Ex9M1 Ex9M2 Ex9M3 Ex9M4 Ex9M5 Ex9M6
Auxiliary contact AX AX21
Alarm contact AL AL21
Shunt release SHT2) SHT 21/SHT 21M SHT 22/SHT 22M SHT 24/SHT 24M SHT 26
Undervoltage release UVT UVT 21 UVT 22 UVT 24 UVT 26
Closing electromagnet XF3) — ————XF 26
Direct rotary handle RHD RHD 21 RHD 22 RHD 23 RHD 24 —
Extended rotary handle ERH ERH 21 ERH 22 ERH 23 ERH 24 ERH 26
Long handle LHD — ————LHD26
Motor-driven operating mechanism MOD MOD 21 MOD 22 MOD 23 MOD 24 MOD 26
Handle locking device KLK KLK 21 KLK 22 KLK 23 — —
Mechanical interlock MIT MIT 21 MIT 22 MIT 23 MIT 24 —
Short terminal cover TCV TCV 21 TCV 22 TCV 23 TCV 24 —
Long terminal cover TCE TCE 21 TCE 22 TCE 23 TCE 24 —
Front connection plate JP JP 21 JP 22 JP 23 —JP 26
Rear connection plate RCP RCP 21 RCP 22 RCP 23 RCP 24 —
Draw-out base DOB — — DOB 23 DOB 24 —
Plug-in base PIA PIA 21 PIA 22 PIA 23 ——
Cable connector MC MC 21 MC 22 MC 23 MC 24 MC 26 W3
MC 26 W4
Rail adapter DRA DRA 21 DRA 22 ———
Communication module COM COM 22 (for Ex9M SU electronic series)
Battery box BAB —BAB 22
Interphase barrier PHS PHS 21 PHS 22 PHS 23 PHS 24 PHS 26
Model Selection example:
SHT 22 AC110V: Order a shunt release for product with frame size of Ex9M2 and Ex9M3, with rated control voltage of AC 110V;
RHD 23: Order a direct rotary handle for Ex9M3 product.
Similar for others.
— None
SHT/UVT rated control voltage
MOD rated control voltage
AC48V DC24V
AC110V DC48V
AC220V-240V DC110-120V
AC380V-415V DC220V
AC110V DC24V
AC220-240V DC110-120V
AC380V-415V DC220V
Model Selection and Ordering InformationModel Selection and Ordering Information
Note: 1)
1P product only provides handle locking device, 2P product provides internal accessories (including shunt release, undervoltage release,
auxiliary contact) and external accessories (including handle locking device, front/rear connection plate), other accessories are not included.
2) There are two types of shunt release available: normal type and low power consumption type (plus M behind frame size code);
3) Only available for Ex9M6 MOD motor-driven version circuit breaker.
NSU20L
Breaking
capacity code
Release
code
S: 36kA
N: 50kA
Q: 70kA
H: 100kA
P: 150kA
TM: thermo-magnetic
power distribution
protection
SU20L: basic type
electronic power
distribution protection
SU20S: standard
type electronic power
distribution protection
M: electromagnetic
motor protection
SU20LM: basic type
electronic motor
protection
SU20SM: standard
type electronic motor
protection
See the current
specications
of TM/SU20L/
SU20S/M/
SU20LM/
SU20SM
AC circuit
breakers with
corresponding
frame size.
RCD1: 0.03-0.1-0.3-1A
adjustable (applicable
to Ex9ML1/2/3)
RCD2: 0.05-0.2-0.5-2A
adjustable (applicable
to Ex9ML1/2)
RCD3: 0.05-0.2-0.5-1A
adjustable (applicable
to Ex9ML3)
RCD4: 0.1-0.3-1-2A
adjustable (applicable
to Ex9ML3)
Ex9M
Product code
3: 400A
250A: default
4: 630A
400A: default
5: 800A
630A: default
6: 1600A 800A,1000A
1250A,1600A
800A: default
Frame size
code
2: 250A
1: 160A 160A: default
6SD AC230 AC 1250 3P MOD
Function
code
Application
category code
Operating
current code
Control
voltage2)
Pole number
code1)
Operating
rules2)
SD:
disconnecting
switch
AC: alternate
current
DC: direct
current
1P/2P/3P/4P
Default: manual
version
MOD: motor-
driven version
Note: 1)1P/2P is only applicable to products with frame size of Ex9M1SD and Ex9M2SD
2)Only applicable to products with frame size of Ex9M6SD.
22 M AC110V 3P OTHER
Note: The residual current protection module does not have code for breaking capacity, release and rated current, these can be offered separately;
electronic protection is not available for product with frame size of 160A, please contact Noark for details.
AC230V
AC400V
DC110V
DC220V

2120
Model Selection and Ordering InformationModel Selection and Ordering Information
Reference table for accessory selection
Accessory type Abbreviation Description Ex9M1 Ex9M2 Ex9M3 Ex9M4/Ex9M5 Ex9M6
Frame size code 1 2 3 4/5 6
Auxiliary contact AX Universal AX 21 AX 21
Alarm contact AL Universal AL 21 AL 21
Shunt release SHT
AC48V SHT 21 AC48V SHT 21M AC48V SHT 22 AC48V SHT 22M AC48V SHT 22 AC48V SHT 22M AC48V SHT 24 AC48V SHT 24M AC48V SHT 26 AC48V
AC110V SHT 21 AC110V SHT 21M AC110V SHT 22 AC110V SHT 22M AC110V SHT 22 AC110V SHT 22M AC110V SHT 24 AC110V SHT 24M AC110V SHT 26 AC110V
AC220-240V SHT 21 AC220-240V SHT 21M AC220-240V SHT 22 AC220-240V SHT 22M AC220-240V SHT 22 AC220-240V SHT 22M AC220-240V SHT 24 AC220-240V SHT 24M AC220-240V SHT 26 AC380-415V
AC380-415V SHT 21 AC380-415V SHT 21M AC380-415V SHT 22 AC380-415V SHT 22M AC380-415V SHT 22 AC380-415V SHT 22M AC380-415V SHT 24 AC380-415V SHT 24M AC380-415V SHT 26 AC220-240V
DC24V SHT 21 DC24V SHT 21M DC24V SHT 22 DC24V SHT 22M DC24V SHT 22 DC24V SHT 22M DC24V SHT 24 DC24V SHT 24M DC24V SHT 26 DC24V
DC48V SHT 21 DC48V SHT 21M DC48V SHT 22 DC48V SHT 22M DC48V SHT 22 DC48V SHT 22M DC48V SHT 24 DC48V SHT 24M DC48V SHT 26 DC48V
DC110-120V SHT 21 DC110-120V SHT 21M DC110-120V SHT 22 DC110-120V SHT 22M DC110-120V SHT 22 DC110-120V SHT 22M DC110-120V SHT 24 DC110-120V SHT 24M DC110-120V SHT 26 DC110V
DC220V SHT 21 DC220V SHT 21M DC220V SHT 22 DC220V SHT 22M DC220V SHT 22 DC220V SHT 22M DC220V SHT 24 DC220V SHT 24M DC220V SHT 26 DC220V
Undervoltage
release UVT
AC48V UVT 21 AC48V UVT 22 DC24V UVT 22 DC24V UVT 24 AC48V UVT 26 AC48V
AC110V UVT 21 AC110V UVT 22 DC48V UVT 22 DC48V UVT 24 AC110V UVT 26 AC110V
AC220-240V UVT 21 AC220-240V UVT 22 DC110-120V UVT 22 DC110-120V UVT 24 AC220-240V UVT 26 AC220-240V
AC380-415V UVT 21 AC380-415V UVT 22 DC220V UVT 22 DC220V UVT 24 AC380-415V UVT 26 AC380-415V
DC24V UVT 21 DC24V UVT 22 AC48V UVT 22 AC48V UVT 24 DC24V UVT 26 DC24V
DC48V UVT 21 DC48V UVT 22 AC110V UVT 22 AC110V UVT 24 DC48V UVT 26 DC48V
DC110-120V UVT 21 DC110-120V UVT 22 AC220-240V UVT 22 AC220-240V UVT 24 DC110-120V UVT 26 DC110-120V
DC220V UVT 21 DC220V UVT 22 AC380-415V UVT 22 AC380-415V UVT 24 DC220V UVT 26 DC220V
Closing
electromagnet XF
AC48V — — — — XF 26 AC48V
AC110V — — — — XF 26 AC110V
AC220-240V — — — — XF 26 AC220-240V
AC380-415V — — — — XF 26 AC380-415V
DC24V — — — — XF 26 DC24V
DC48V — — — — XF 26 DC48V
DC110-120V — — — — XF 26 DC110-120V
DC220V — — — — XF 26 DC220V
Motor-driven
operating
mechanism
MOD
AC110/DC110-120V MOD 21 AC110/DC110-120V MOD 22 AC110/DC110-120V MOD 23 AC110/DC110-120V MOD 24 AC110/DC110-120V MOD 26 AC110/DC110-120V
AC220-240/DC220V MOD 21 AC220-240V/DC220V MOD 22 AC220-240V/DC220V MOD 23 AC220-240V/DC220V MOD 24 AC220-240V/DC220V MOD 26 AC220-240V/DC220V
AC380-415V MOD 21 AC380-415V MOD 22 AC380-415V MOD 23 AC380-415V MOD 24 AC380-415V MOD 26 AC380-415V
DC24V MOD 21 DC24V MOD 22 DC24V MOD 23 DC24V MOD 24 DC24V MOD 26 DC24V
Direct rotary
handle RHD 3P/4P RHD 21 RHD 22 RHD 23 RHD 24 —
Extended rotary
handle ERH 3P/4P ERH 21 ERH 22 ERH 23 ERH 24 ERH 26
Long handle LHD 3P/4P — — — — LHD 26
Handle locking
device KLK 3P/4P KLK 21 KLK 22 KLK 23 — —
Mechanical
interlock MIT 3P/4P MIT 21 MIT 22 MIT 23 MIT 24 —
Short terminal
cover TCV 3P TCV 21 3P TCV 22 3P TCV 23 3P TCV 24 3P —
4P TCV 21 4P TCV 22 4P TCV 23 4P TCV 24 4P —
Long terminal
cover TCE 3P TCE 21 3P TCE 22 3P TCE 23 3P TCE 24 3P —
4P TCE 21 4P TCE 22 4P TCE 23 4P TCE 24 4P —
Front connection
plate JP
1P JP 21 1P JP 22 1P ———
2P JP 21 2P JP 22 2P ———
3P JP 21 3P JP 22 3P JP 23 3P —JP 26 1000-1250A 3P
JP 26 1600A 3P
4P JP 21 4P JP 22 4P JP 23 4P —JP 26 1000-1250A 4P
JP 26 1600A 4P
Rear connection
plate RCP
1P RCP 21 1P RCP 22 1P ———
2P RCP 21 2P RCP 22 2P ———
3P RCP 21 3P RCP 22 3P RCP 23 3P RCP 24 3P —
4P RCP 21 4P RCP 22 4P RCP 23 4P RCP 24 4P —

2322
Accessory type Abbreviation Description Ex9M1 Ex9M2 Ex9M3 Ex9M4/Ex9M5 Ex9M6
Frame size code 1 2 3 4/5 6
Cable connector MC
Built-in MC 21 MC 22 MC 23 — —
1-hole MC 21 W MC 22 W ———
2-hole —MC 22 W2 MC 23 W2 MC 24 W2 —
3-hole — — — — MC 26 W3(800A)
4-hole — — MC 23 W4 —MC 26 W4(1000/1250A)
6-hole MC 22 W6 ———
Draw-out base DOB
Thermo-magnetic 3P front — — DOB 23F 3P CO(400A) DOB 23F 3P CO(630A) DOB 24F 3P CO —
Thermo-magnetic 4P front — — DOB 23F 4P CO(400A) DOB 23F 4P CO(630A) DOB 24F 4P CO —
Thermo-magnetic 3P rear — — DOB 23B 3P CO(400A) DOB 23B 3P CO(630A) DOB 24B 3P CO —
Thermo-magnetic 4P rear — — DOB 23B 4P CO(400A) DOB 23B 4P CO(630A) DOB 24B 4P CO —
Electronic 3P front — — DOB 23F 3P CO SU(400A) DOB 23F 3P CO SU(630A) DOB 24F 3P CO SU —
Electronic 4P front — — DOB 23F 4P CO SU(400A) DOB 23F 4P CO SU(630A) DOB 24F 4P CO SU —
Electronic 3P rear
— — DOB 23B 3P CO SU(400A) DOB 23B 3P CO SU(630A) DOB 24B 3P CO SU —
Electronic 4P rear — — DOB 23B 4P CO SU(400A) DOB 23B 4P CO SU(630A) DOB 24B 4P CO SU —
Plug-in base PIA
Thermo-magnetic 3P front PIA 21F 3P PIA 22F 3P PIA 23F 3P — —
Thermo-magnetic 4P front PIA 21F 4P PIA 22F 4P PIA 23F 4P — —
Thermo-magnetic 3P rear PIA 21B 3P PIA 22B 3P PIA 23B 3P — —
Thermo-magnetic 4P rear PIA 21B 4P PIA 22B 4P PIA 23B 4P — —
Electronic 3P front —PIA 22F 3P SU PIA 23F 3P SU — —
Electronic 4P front —PIA 22F 4P SU PIA 23F 4P SU — —
Electronic 3P rear —PIA 22B 3P SU PIA 23B 3P SU — —
Electronic 4P rear —PIA 22B 4P SU PIA 23B 4P SU — —
DIN-rail adapter DRA 3P/4P DRA 21 DRA 22 ———
Communication
module COM
DC24V
—COM 22 DC24V 0.5m COM 22 DC24V 0.5m
—COM 22 DC24V 1.5m COM 22 DC24V 1.5m
—COM 22 DC24V 3m COM 22 DC24V 3m
AC230V
—COM 22 AC230V 0.5m COM 22 AC230V 0.5m
—COM 22 AC230V 1.5m COM 22 AC230V 1.5m
—COM 22 AC230V 3m COM 22 AC230V 3m
Battery box BAB — BAB 22 BAB 22
Interphase barrier PHS PHS 21 PHS 22 PHS 23 PHS 24 PHS 26
Model Selection and Ordering InformationModel Selection and Ordering Information

2524
Ex9M series moulded case circuit breaker Ex9M1 Ex9M2 Ex9M3 Ex9M4 Ex9M5 Ex9M6
Frame size rated current Inm (A) 160 250 400/630 630 800 1600
Frequency (Hz) 50/60 50/60 50/60 50/60 50/60 50/60
Rated insulation voltage Ui (V) 1000 1000 1000 1000 1000 1000
Rated insulation voltage Ui (kV) 8 8 12 12 12 8
Rated operating voltage Ue (V) 380/400/415,440,500,660/690 380/400/415,440,500,660/690 380/400/415,440,500,660/690 380/400/415,440,500,660/690 380/400/415,440,500,660/690 380/400/415,440,
500,660/690
Rated operating current
In(A), 40°C
Electromagnetic 16-20-25-32-40-50-63-80-100-125-160 125-160-180-200-225-250 250-315-350-400-500 400-500-630 630-700-800 —
Thermo-magnetic 16-20-25-32-40-50-63-80-100-125-160 125-160-180-200-225-250 250-315-350-400-500 400-500-630 630-700-800 800-1000-1250-1600
Electronic — 32-63-100-160-250 250-400-630 630 800 800-1000-1250-1600
Breaking capacity code S N QH P S N QH P S N QH P S N QH P S N QHPNQH
Pole number
1P ■■———■■— — — ——————————————————
2P ■■■■■■■■■■ ——————————————————
3P ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■■■■■■■■■■■■■■■■■■
4P ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■■■■■■■■■■■■■■■■■■
Rated ultimate short
circuit breaking
capacity Icu (kA)
AC220V/230V/240V1) 36 50———36 50 — — — ——————————————————
AC380/400/415V 36 50 70 100 150 36 50 70 100 150 36 50 70 100 150 36 50 70 100 150 36 50 70 100 150 50 70 100
AC440V 36 50 70 100 100 36 50 70 100 100 36 50 70 100 100 36 50 70 100 100 36 50 70 100 100 50 65 —
AC500V 25 40 40 50 50 25 40 40 50 50 25 40 40 50 50 25 40 40 50 100 25 40 40 50 100 40 50 —
AC660/690V 6 8 8 10 10 6 8 8 10 10 10 12 12 15 15 12 15 15 20 30 12 15 15 20 30 30 30 30
Rated service short
circuit breaking
capacity Ics (kA)
AC220V/230V/240V1) 36 50———36 50 — — — ——————————————————
AC380/400/415V 36 50 70 100 150 36 50 70 100 150 36 50 70 100 150 36 50 70 100 150 36 50 70 100 150 50 70 70
AC440V 36 50 70 100 100 36 50 70 100 100 36 50 70 100 100 36 50 70 100 100 36 50 70 100 100 40 50 —
AC500V 25 40 40 50 50 25 40 40 50 50 25 40 40 50 50 25 40 40 50 100 25 40 40 50 100 30 40 —
AC660/690V 6 8 8 10 10 6 8 8 10 10 10 12 12 15 15 12 15 15 15 15 12 15 15 15 15 30 30 30
Rated short-time withstand
current Icw (kA) 1s — 1(32-63A)/2(80-160A)/3(180-250A) 5(250-400A)/8(500-630A) 10 10 20
Application category A A A (Thermo-magnetic) / B (Electronic) A (Thermo-magnetic) / B (Electronic) A (Thermo-magnetic) / B (Electronic) A (Thermo-magnetic) /
B (Electronic)
Isolating function ■ ■ ■ ■ ■ ■
Flashover distance (mm) 0 0 0 0 0 0
Applicable standards IEC/EN 60947-2 IEC/EN 60947-2
Operating ambient temperature -40°C~70°C2) -40°C~70°C2)
Mechanical life (times) Maintenance free 15000 15000 15000 10000 10000 6000
Electrical life (times) AC415V,In 8000 5000 4000 3000 2000 1000
AC690V,In 2000 2000 1500 1000 1000 1000
Outline dimensions (mm)
Width (W) ╳Height (H) ╳
Depth (D)
w
H
DWidth (1P/2P/3P/4P) 35/62/90/120 40/75/105/140 140/185 195/260 195/260 210/280
Height 140 157 255 300 300 286
Depth 81.6 96.5 118.5 142 142 167 (195) 3)
Weight (kg)/xed type
1P 0.5 0.75 — — — —
2P 0.9 1.3 ————
3P 1.2 1.85(TM/M)；2.0(SU20L/SU20S) 5.2(TM/M)；5.8(SU20L/SU20S) 10.5(TM/M)；10.5(SU20L/SU20S) 10.5(TM/M)；10.5(SU20L/SU20S) 13.5 (16) 3)
4P 1.7 2.5(TM/M)；2.65(SU20L/SU20S) 6.7(TM/M)；7.8(SU20L/SU20S) 13.5(TM/M)；13.5(SU20L/SU20S) 13.5(TM/M)；13.5(SU20L/SU20S) 17.5 (20) 3)
Functions
■ Yes □ Optional — No ○ Contact us for specic ordering.
Note: 1) 1P/2P is only available for Ex9M1 and Ex9M2 (except electronic type);
2) The operating temperature for basic type (dial switch) electronic circuit breakers is -35 °C ~+70 °C, and the operating temperature for standard type (LCD)
electronic circuit breakers is -25 °C ~+70 °C;
3) The number in the brackets is from Ex9M6 MOD electronic version; the Ex9M6 MOD electronic version is equipped with 2 groups of AX21 auxiliary contacts
(2NO, 2NC), 1 alarm contact, 1 closing electromagnet, 1 shunt release, and 1 electric motor-driven operating mechanism as standard.
Parameter and function table
FunctionsFunctions

2726
■ Yes □ Optional — No
1P and 2P are only available for Ex9MD1 and Ex9MD2; 250V is 1P in series, 500V is 2P in series, 750V is 3P in series, and 1000V is 4P in series.
*
FunctionsFunctions
Ex9MD series DC moulded case circuit breaker Ex9MD1 Ex9MD2 Ex9MD3 Ex9MD4 Ex9MD5 Ex9MD6
Frame size rated current Inm (A) 160 250 400/630 630 800 1600
Rated insulation voltage Ui (V) 1000 1000 1000 1000 1000 1000
Rated impulse withstand voltage Uimp (kV) 8 8 12 12 12 8
Rated operating voltage Ue (V) 250/500/750/1000 250/500/750/1000 750/1000 750/1000 750/1000 750/1000
Rated operating current
In(A), 40°C Thermo-magnetic 16-20-25-32-40-50-63-80-100-125-160 125-160-180-200-225-250 250-315-350-400-500 400-500-630 630-700-800 800-1000-1250- 1600
Breaking capacity code
Pole number
BSNQH B S N QH B S N QH B S N QH B S N QH B S
1P ■■■——■■■— — —————————————————
2P ■■■■■■■■■■ —————————————————
3P ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■■■■■■■■■■■■■■■■■
4P ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■■■■■■■■■■■■■■■■■
Rated ultimate short circuit
breaking capacity Icu (kA)
DC250V 1P 25 36 50 — — 25 36 50 — — —————————————————
DC500V 2P in series 25 36 50 70 100 25 36 50 70 100 —————————————————
DC750V 3P in series 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36
DC1000V 4P in series 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36
Rated service short circuit
breaking capacity Ics (kA)
DC250V 1P 25 36 50 — — 25 36 50 — — —————————————————
DC500V 2P in series 25 36 50 70 100 25 36 50 70 100 —————————————————
DC750V 3P in series 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36
DC1000V 4P in series 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36 50 70 100 25 36
Application category A A A A A A
Isolating function ■ ■ ■ ■ ■ ■
Flashover distance (mm) 0 0 0 0 0 0
Applicable standards IEC/EN 60947-2 IEC/EN 60947-2
Operating ambient temperature -40°C~70°C -40°C~70°C
Mechanical life (times) Maintenance free 15000 15000 15000 10000 10000 6000
Electrical life (times) DC1000V,In 2000 1500 1500 1500 1000 1000
Outline dimensions
(mm)
Width (W) ╳Height
(H) ╳Depth (D)
w
H
DWidth (1P/2P/3P/4P) 35/62/90/120 40/75/105/140 140/185 195/260 195/260 210/280
Height 140 157 255 300 300 286
Depth 81.6 96.5 118.5 142 142 167
Weight (kg)/xed type
1P 0.5 0.75 — — — —
2P 0.9 1.3 ————
3P 1.2 1.85 5.5 10.7 10.7 13.5
4P 1.7 2.5 7.0 14.5 14.5 17.5

2928
Ex9MSD series switch disconnector Ex9M1SD Ex9M2SD Ex9M3SD Ex9M4SD Ex9M5SD Ex9M6SD
Conventional thermal current Ith (A), 40°C 160 250 400 630 800 1600
Pole number 2P 3P 4P 2P 3P 4P 3P 4P 3P 4P 3P 4P 3P 4P
Rated insulation voltage Ui (V) 1000 1000 1000 1000 1000(AC)/1250(DC) 1000(AC)/1500(DC)
Rated impulse withstand voltage Uimp (kV) 8 8 12 12 12 12
Rated operating voltage Ue (V) AC (50/60Hz) 690 690 690 690 690 415/690
DC 500 750 1000 500 750 1000 750 1000 750 1000 750 1000 750 1500
Rated operating current Ie (A) AC (50/60Hz) 160 250 400 630 800 800-1000-1250-1600
DC 160 250 400 630 800 800-1000-1250-1600
Rated short-time making
capacity Icm (kA) 3.2(AC)/2(DC) 5(AC)/3.2(DC) 8(AC)/5(DC) 14 17 40(AC)/19.2(DC)
Rated short time withstand
current Icw (kA)
1s 2 3.2 5 8 10 20(AC)/19.2(DC)
3s 2 3.2 5 8 10 20(AC)
Applicable standards IEC/EN 60947-3 IEC/EN 60947-3
Application category AC-22A/AC-23A
DC-22A/DC-23A/DC-PV2
AC-22A/AC-23A
DC-22A/DC-23A/DC-PV2
AC-22A/AC-23A
DC-22A/DC-23A/DC-PV2
AC-22A/AC-23A
DC-22A/DC-22B
Isolating function ■ ■ ■ ■ ■ ■
Applicable operating ambient temperature -40°C~70°C -40°C~70°C
Flashover distance (mm) 0 0 0 0 0 0
Mechanical life (times) Maintenance free 15000 15000 15000 10000 10000 6000
Electrical life (times) AC690V,In 2000 2000 1500 1000 1000 1000
DC1000V,In 2000 1500 1500 1000 1000 1000
Outline dimensions
(mm)
Width (W) ╳Height
(H) ╳Depth (D)
w
H
D
Width (2P/3P/4P) 62/90/120 70/105/140 140/185 195/260 195/260 210/280
Height 140 157 255 300 300 286
Depth 81.6 96.5 118.5 142 142 167
Weight (kg)/xed type
2P 0.8 1.1 — — — —
3P 1.05 1.75 5 9.5 9.5 13
4P 1.55 2.4 6.5 12.5 12.5 17
■ Yes □ Optional — No ○ Contact us for specic ordering.
Note: 2P is only available to Ex9M1SD and Ex9M2SD; 2-pole in series for DC 500V, 3-pole in series for DC 700V, 4-pole in series for DC 1000V.
FunctionsFunctions

3130
Ex9ML series residual current protection module Ex9ML1 Ex9ML2 Ex9ML3
Frame size rated current Inm (A) 160 250 400/630
Pole number 3P、4P 3P、4P 3P、4P
Rated insulation voltage Ui (V) 1000 1000 1000
Rated impulse withstand voltage Uimp (kV) 8 8 12
Rated operating voltage Ue (V), AC 50/60Hz 380/400/415、440 380/400/415、440 380/400/415、440
Rated residual
non-operating
current IΔn (A)
A type/AC type
RCD1 (4 steps
adjustable) 0.03-0.1-0.3-1 0.03-0.1-0.3-1 0.03-0.1-0.3-1
RCD2 (4 steps
adjustable) 0.05-0.2-0.5-2 0.05-0.2-0.5-2 —
RCD3 (4 steps
adjustable) ——0.05-0.2-0.5-1
RCD4 (4 steps
adjustable) ——0.1-0.3-1-2
Rated residual non-operating current IΔno (A) 0.5IΔn 0.5IΔn 0.5IΔn
Limit non-actuating time1) Δt : 0-60-200-500
Maximum breaking time (ms) Total breaking time
(adjustable) 100-300-500-1000 100-300-500-1000 100-300-500-1000
Rated residual connecting and breaking capacity
IΔm (kA) 0.25Icu 0.25Icu 0.25Icu
Circuit breaker frame size Ex9M1 Ex9M2 Ex9M3
Circuit breaker
release type
Distribution
protection
TM ■■■
SU20L —■ ■
SU20S —■ ■
Motor
protection
M■■■
SU20LM —■ ■
SU20SM —■ ■
Leakage alarm non-release function □□□
Applicable standards IEC/EN 60947-2
Residual current category A/AC A/AC A/AC
Isolating function ■■■
Applicable operating ambient temperature -40°C~+70°C2)
Outline dimensions
(mm)
Width (W) ╳Height
(H) ╳Depth (D)
w
H
D
Width (3P/4P) 90/120 105/140 140/185
Height 205 232 355
Depth 85 94.5 118.5
Weight (kg) 3P 0.43 0.84 1.98
4P 0.51 1.08 2.69
FunctionsFunctions
■ Yes □ Optional — No ○ Contact us for specic ordering.
Note: 1) If the residual operating current is set to 0.03A, the limit non-actuating time must be set to 0;
2) The operating temperature for basic type (dial switch) electronic circuit breakers is -35 °C ~+70 °C, and the operating temperature for
standard type (LCD) electronic circuit breakers is -25 °C ~+70 °C
AC power distribution protection
Primary distribution
air circuit breaker
Secondary distribution moulded
case circuit breaker
Tertiary distribution miniature circuit
breaker and surge protector
Key parameters
Protections
Applicable to distribution circuits with AC 50/60Hz and rated voltage up to 690V
The maximum rated operating current is up to 1600A for continuous stable operation at +40°C
The maximum short circuit breaking capacity is up to 150kA under AC 415V
Overload protection
The inverse time limit feature of the release characteristic curve of Ex9M enables it not only to
maintain continuous power supply in case of short period of slight overload, but also to cut off
overload current in case of harmful overload.
Short circuit protection
Short time delay short circuit protection: When the short circuit current in the protected circuit
reaches the set value of Isd, the circuit breaker will release after a very short period of delay.
This function can be used with downstream circuit breaker for selective protection;
Instantaneous short circuit protection: When the short circuit current in the protected circuit
reaches the set value of Ii, to ensure the safety of the circuit, the Ex9M circuit breaker will
release within 50ms, if the short circuit current reaches 150kA, the circuit breaker will release
within 2ms.
Undervoltage protection
When there is abnormal voltage uctuation in the protected circuit, and the actual uctuation
range is from 35%-70% (undervoltage) of the rated value, the Ex9M circuit breaker will cut off
the load in the protected circuit. This function requires a undervoltage release (UVT).
Isolation
Make sure no accidental electric shock that can cause personal injury or property damage will
occur during maintenance of distribution system.
Residual current protection
Ex9M1/ Ex9M2/ Ex9M3 are equipped with residual current protection module for following
protections:
* Overload and short circuit protection for the equipment;
* Indirect contact protection for human, preventing risk of grounding current increase due to
insulation damage.
* Protect from fire and other risks caused by long-existing grounding fault that cannot be
detected by overcurrent protection device.
* In case the failure of corresponding protection measure, the residual current protection circuit
breaker with rated residual operating current up to 30mA can also provide supplementary
protection for direct contact.

3332
FunctionsFunctions
(1) Thermomagnetic release TM
Circuit breakers with frame size from Ex9M1- Ex9M6 are all available with thermomagnetic release TM for AC or DC distribution protection, with
rated operating current of 16A-1600A.
The overload protection function is realized by bimetal operating mechanism;
The instantaneous short circuit protection function is realized by magnetic release;
The neutral pole protection of 4-pole circuit breaker (4P4T) is the same as other phase lines, and the contact can be disconnected at the same
time with other phase lines.
Distribution protection
Thermomagnetic
release TM
Ex9M1 Ex9M2 Ex9M3 Ex9M4 Ex9M5 Ex9M6
Pole number 1P 2P 3P、4P 1P 2P、3P、4P 3P、4P 3P、4P 3P、4P 3P、4P
Current
specication
16、20、25、32、
40、50、63、80、
100、125、160
16、20、
25、32、
40、50、
63、80、
100
125、160
125、
160、
180、
200、
225、250
125
160、
180、
200、
225、250
250、
315、
350、
400、500
400、
500、630
630、
700、800
800、
1000、
1250、
1600
Overload protection
Current setting
(A) Ir=In х
1.0 not
adjustable
0.7-0.8-0.9-1.0
1.0 not
adjustable
0.7-0.8-0.9-1.0 0.8-0.9-
1.0
Precision ±20%
Instantaneous short circuit protection
Current setting
(A) Ii=In х10 5-6-7-8-9-
10 10 7-8-9-10- 11-12 5-6-7-8-9-10
Precision ±20%
N极保护
Current setting
(A) IiN=In х/ 10 / Pole of the same phase
Precision ±20%
Electronic release (SU20L) Ex9M2 Ex9M3 Ex9M4 Ex9M5 Ex9M6
Overload protection
Current setting (A)Ir=In╳0.4-0.5-0.6-0.7-0.8-0.9-0.95-1.0
6Irrelease time Tr(s) 3-6-12-18，Precision ±10%
Short time delay short circuit protection
Current setting (A)Isd=Ir╳1.5-2-3-4-6-8-10，can be set to OFF，Precision±15%
Release timeTsd(s) 0.1-0.2-0.3-0.4，Precision ±20% or ±40ms (which is bigger)
Instantaneous short circuit protection
Current setting (A)Ii=In╳2-3-4-6-8-10-12，can be set to OFF, precision ±15%
Maximum release time (ms) 60
N pole protection
Current setting IrN=(0.5,1) ╳In；IsdN=(1.5-2-3-4-6-8-10)IrN；IiN=(2-3-4-6-8-10-12)IrN
Release time Same as phase line protection
(2) Basic type electronic release SU20L
Circuit breakers with frame size from Ex9M2- Ex9M6 are all available with basic type electronic release SU20L for AC distribution protection, with
rated operating current of 32A-1600A.
●High release precision, reliable operation, free from the impact of ambient temperature
●Operating ambient temperature: -35°C~+70°C
The basic type electronic release can provide 3-step protections (LSI):
Long time delay overload protection L
This is an inverse time limit protection. There are 8 stages of current setting available (Ir= 0.4-0.5-0.6-0.7-0.8-0.9-0.95-1.0In), and 4 stages of
overload protection release time available (Tr= 3-6-12-18s).
Short time delay short circuit protection S
There are 7 stages of current setting available (Isd= 1.5-2-3-4-6-8-10Ir), and 4 stages of short time delay short circuit protection release time
(Tsd= 0.1-0.2-0.3-0.4s). This function can be used with downstream circuit breaker for selection protection. This function can also be set to OFF.
Instantaneous short circuit protection I
There are 7 stages of instantaneous short circuit current setting available (Ii= 2-3-4-6-8-10-12In). This function can also be set to OFF.
Neutral pole protection
Neutral pole protection current IrN=(0.5,1)In, IsdN=(1.5-2-3-4-6-8-10)IrN, IiN=(2-3-4-6-8-10-12)IrN, the release time is the same as phase line protection.

3534
FunctionsFunctions
(3) Standard type electronic release SU20S
Circuit breakers with frame size from Ex9M2- Ex9M6 are all available with standard type electronic release SU20S for AC distribution protection,
with operating ambient temperature of -25°C~+70°C and rated operating current of 32A-1600A.
The standard type electronic release provides 4 stage protection (LSIG):
Long time delay overload protection L
This is an inverse time limit protection. The current setting Ir is (0.4~1.0)In, and the overload protection release time Tr is 3-18s, with increment of 1s.
Short time delay short circuit protection S
The short time delay short circuit current setting Isd is (1.5~10)Ir, with increment of 1A. The short time delay short circuit protection release time Tsd
is (0.1~0.4)s, with increment of 0.1s. This function can be used with downstream circuit breaker for selection protection. This function can also be
set to OFF.
Instantaneous short circuit protection I
The instantaneous short circuit current setting Ii is (1.5~12)In, with increment of 1A. This function can also be set to OFF.
Grounding protection G
The grounding current setting Ig is (0.4~1.0)In, with increment of 0.1 In, the release time is (0.1~0.4)s, with increment of 0.1s. This function can also
be set to OFF.
Neutral pole protection
The neutral pole protection current IrN=(0.5,1)In, IsdN=(1.5~10)IrN, IiN=(1.5~12)IrN, the release time is the same as phase line protection.
Electronic release (SU20S) Ex9M2 Ex9M3 Ex9M4 Ex9M5 Ex9M6
Overload protection
Current setting (A)Ir=In╳0.4-1.0, increment 1A, no OFF
6IrRelease timeTr(s) 3-18, increment 1s, precision ±10%
Short time delay short circuit protection
Current setting (A)Isd=Ir╳1.5-10, increment 1A, can be set to OFF, precision ±15%
Release timeTsd(s) 0.1-0.2-0.3-0.4，precision ±20% or ±40ms (which is bigger)
Instantaneous short circuit protection
Current setting (A)Ii=In╳1.5~12，increment 1A, can be set to OFF, precision ±15%
Maximum release time (ms) 60
Grounding protection
Current setting (A)Ig=In╳0.4-0.5-0.6-0.7-0.8-0.9-1.0，can be set to OFF, precision ±10%
Release time(s) 0.1-0.2-0.3-0.4，precision ±20% or ±40ms (which is bigger)
N pole protection
Current setting IrN=(0.5,1) ╳In；IsdN=(1.5~10)IrN；IiN=(1.5~12)IrN
Release time Same as phase line protection
Motor fault types
Motor protection solution
Undervoltage
* The voltage of distribution system deviates from normal value, the voltage supplied to the
motor is much smaller than the rated voltage of the motor.
* The supplied voltage is too small which causes reduced motor output torque, when the output
torque is not big enough to drive the load, the motor will locked
* When the motor is locked, the rotor current will increase rapidly, which will cause overheat and
burn out the motor.
Overload
* The load driven by the motor is higher than the rated value which cause motor overload
* Mechanical fault, such as bearing wear, vibration, that causes increased mechanical loss and
decreased actual output torque to the motor, the result is the same as the one above
* Usually, motors can run with overload for a short period of time, however, long-term overload
can cause overheat and burn out the motor.
Short circuit
* Direct connection between positive and negative poles due to motor insulation aging or
breakdown.
* Man-made wiring mistake
* The most series short circuit fault is large instantaneous current that can burn out the motor
Phase unbalance or phase failure
Phase unbalance or phase failure can cause temperature rise and braking torque, which can
further accelerate the aging of the motor.
Noark provides the following two solutions for motor protection, please contact Noark before
ordering two-element solution.
Three-element solution
Circuit breaker with magnetic protection + contactor + thermal relay
Two-element solution
Circuit breaker with overload and short circuit protection + contactor
Circuit breaker with
magnetic protection
(Isolation)
(Short circuit protection)
Contactor
(Connecting/disconnecting
power)
(Execute overload protection)
Independent thermal
relay
(Overload protection)
IIn Id Id’
t
td
Motor direct start
current curve
Ie= rated operating current of motor
Ip= start instantaneous current peak
ts= motor start time
tp= start peak current time
m = typical motor start curve
c = example of motor protective release curve of circuit breaker with electronic release。
Ir
t
unbal
tsd
tp
ts
Iunbal Isd Ii
Motor protection

3736
(1) Electromagnetic type release M (2) Basic type electronic release SU20LM
FunctionsFunctions
Circuit breakers with frame size from Ex9M1- Ex9M5 are all available with electromagnetic type
release M, which are applicable to motor feeder circuit solutions with three elements. The release is
used with AC contactor and thermal relay to guarantee the normal operation of motor, among which:
●The moulded case circuit breaker M type release is used for instantaneous short circuit protection
●The AC contactor is used for start/stop operation of motor
●The thermal relay is used for overload, phase failure and phase unbalance protection
Instantaneous short circuit protection is realized by electromagnetic release.
The neutral pole protection of 4-pole circuit breaker (4P4T) is the same as other phase lines, and the
contact can be disconnected at the same time with other phase lines.
Circuit breakers with frame size from Ex9M2- Ex9M5 are all available with SU20LM electronic type release, which are applicable to motor feeder
circuit solutions with two or three elements. The release is used with AC contactor to guarantee the normal operation of motor, among which:
● The moulded case circuit breaker with SU20LM electronic type release provides overload protection, short time short circuit protection,
instantaneous short circuit protection and phase unbalance protection
*There are seven adjustable current settings for overload protection (0.4-0.5-0.6-0.7-0.8-0.9-1.0In), this function can be set to OFF.
*There are seven adjustable current settings for short time short circuit protection (5-6-8-9-10-11-12Ir), this function can be set to OFF.
*The current setting for instantaneous short circuit protection (15In) is not adjustable and this function cannot be set to OFF.
*Release levels at 7.2Ir:
*Level 5 release: release time (3-5)s
*Level 10 release: release time (5-10)s
*Level 20 release: release time (10-20)s
*Level 30 release: release time (20-30)s
*The release levels for Ex9M2 are 5, 10, 20; the release levels for Ex9M3, Ex9M4 and Ex9M5 are 5, 10, 20, 30
●Phase unbalance/phase failure protection
* There are seven adjustable average current percentages for phase unbalance protection: (30-40-50-60-70-80-90)%, this function can be set
to OFF.
*There are four adjustable maximum release times: 4-6-8-10s
*The release time for phase failure protection is 0.25s
●High release precision, reliable operation, free from the impact of ambient temperature
●Operating ambient temperature: -35°C~+70°C
Ex9M moulded case
circuit breaker
Ex9C AC contactor
Ex9R thermal relay
Motor
Motor feeder circuit three element
protection solution Electronic release (SU20LM) Ex9M2 Ex9M3 Ex9M4 Ex9M5
Overload protection
Current setting (A)Ir=In╳0.4-0.5-0.6-0.7-0.8-0.9-1.0，可 OFF
7.2IrRelease timeTr(s) 4、8、16 4、8、16、24
Precision Precision ±10%
Release level 5、10、20 5、10、20、30
Short time delay short circuit protection
Current setting (A)Isd=Ir╳5-6-8-9-10-11-12，can be set to OFF, precision ±15%
Delay time Tsd(ms) 100，precision ±40ms
Instantaneous short circuit protection
Current setting (A)Ii=In╳15，not adjustable, precision ±15%
Maximum release time (ms) 60
N pole protection
Current setting (A)IN=In╳IrN=(0.5,1)xIn；IsdN=(5-6-8-9-10-11-12)IrN
IiN=15IrN ；can be set to OFF
Release time Same as phase pole
Phase unbalance/phase failure
Release current setting for phase unbalance Iunbal (30-40-50-60-70-80-90)%(90% is phase failure), can be set to OFF
Maximum release time for phase unbalance 4-6-8-10，precision ±10%
Release time for phase failure 0.25，precision ±20%
Motor protection
Electromagnetic
release M Ex9M1 Ex9M2 Ex9M3 Ex9M4 Ex9M5
Pole number 3P/4P 3P/4P 3P/4P
Instantaneous short circuit protection
Current setting (A)
Ii=In х121) 9-10-11-12-13-14
Precision ±20%
N pole protection
Current setting (A)
IiN=In х12 Same as Ii
Precision ±20%
Note: 1) The current of Ex9M1 3P/4P is 125A/160A, with instantaneous short circuit protection
Ii=In х (9-10-11-12-13-14).

3938
(3) Standard type electronic release SU20SM
FunctionsFunctions
Electronic release (SU20SM) Ex9M2 Ex9M3 Ex9M4 Ex9M5
Overload protection
Current setting (A)Ir=In╳0.4~1.0，increment 1A, can be set to OFF
7.2 IrRelease timeTr(s) 4、8、16 4、8、16、24
Precision Precision ±10%
Release level 5、10、20 5、10、20、30
Short time delay short circuit protection
Current setting (A)Isd=Ir╳4~12，increment 1A, can be set to OFF, precision ±10%
Delay time Tsd(ms) 100，precision ±40ms
Instantaneous short circuit protection
Current setting (A)Ii=In╳15，not adjustable, precision ±15%
Maximum release time (ms) 60
N pole protection
Current setting (A)IN=In╳IrN=(0.5,1)xIn；IsdN=(4~12)IrN; IiN=15IrN；can be set to OFF
Release time Same as phase pole
Grounding protection
Current setting (A)Ig=In╳0.4-0.5-0.6-0.7-0.8-0.9-1.0，can be set to OFF, precision
±15%
Release time(s) 0.1-0.2-0.3-0.4，precision ±20% or ±40ms (which is bigger)
Phase unbalance/phase failure/jamming protection
Release current setting for phase
unbalance Iunbal (A)Iunbal
(30-40-50-60-70-80-90)% (90% is phase failure), can be set
to OFF
Maximum release time for phase
unbalance Tunbal(s) 4-6-8-10，precision ±10%
Release time for phase failure(s) 0.25，precision ±20%
Current setting for motor jamming
(A)Ijam
(3~10)Ir，increment 1A, can be set to OFF, precision ±15%
Release time Tjam(s) 1~30，increment 1s, precision ±10%
Circuit breakers with frame size from Ex9M2- Ex9M5 are all available with SU20SM electronic type
release, which are applicable to motor feeder circuit solutions with two or three elements. The release
is used with AC contactor to guarantee the normal operation of motor, among which:
● The moulded case circuit breaker with SU20SM electronic type release provides overload
protection, short time short circuit protection and instantaneous short circuit protection:
* The current settings for overload protection (0.4-1.0) In, with increment of 1A, this function can be
set to OFF.
* The current settings for short time short circuit protection (4-12Ir), with increment of 1A, this function
can be set to OFF.
* The current setting for instantaneous short circuit protection (15In) is not adjustable and this function
cannot be set to OFF.
●Release levels at 7.2Ir:
*Level 5 release: release time (3-5)s
*Level 10 release: release time (5-10)s
*Level 20 release: release time (10-20)s
*Level 30 release: release time (20-30)s
* The release levels for Ex9M2 are 5, 10, 20; the release levels for Ex9M3, Ex9M4 and Ex9M5 are 5,
10, 20, 30
●Phase unbalance/phase failure protection
* There are seven adjustable average current percentages for phase unbalance protection: (30-40-50-
60-70-80-90)%, this function can be set to OFF.
*There are four adjustable maximum release times: 4-6-8-10s
*The release time for phase failure protection is 0.25s
●Jamming protection
*(3~10)Ir, with increment of 1A, this function can be set to OFF.
*The adjustment range for release time is (1-30)s, with increment of 1s
●High release precision, reliable operation, free from the impact of ambient temperature
●Operating ambient temperature: -35°C~+70°C
Ex9M moulded
case circuit breaker
Ex9C AC contactor
Motor
Motor feeder circuit two element
protection solution