CQW2 Series Air Circuit Breaker
Product Features
■ Rated current from 200A to 6300A, suitable for AC 400V/690V, 50Hz distribution networks.
■ Provides comprehensive protection: overload, short-circuit, undervoltage, and earth fault protection, with isolation functionality.
■ High breaking capacity (Icu up to 120kA at AC415V) and short-circuit withstand capability.
■ Modular and compact design supports both fixed and withdrawable installation.
■Intelligent controller options (L/M/H-type) with precise selective protection, communication support (e.g., Profibus-DP), and remote monitoring capabilities.
■ Complies with IEC 60947-2 and GB/T 14048 standards.
Operating & Installation Conditions
■ Ambient temperature: −5℃ to +40℃ (average ≤ +35℃ within 24 hours).
■ Altitude: ≤ 2000 m (derating required above 2000 m).
■ Pollution degree: 3.
■ Relative humidity: ≤ 50% at +40℃; higher humidity permissible at lower temperatures.
■ Suitable for installation in non-explosive environments, free of conductive dust and corrosive substances.
■ Must be mounted vertically (±5° tilt tolerance).
■ Protection rating: IP30 (IP40 with door frame mounted).
■ Installation category:
- Main circuit & undervoltage release: Ⅳ
- Auxiliary/control circuits: Ⅲ
■ Connection: Horizontal or vertical, based on model configuration.
Type designation
| Code Position | Code Symbol | Meaning & Explanation |
| ① | Enterprise Code | Zhejiang Chuangqi Electric Co., LTD. |
| ② | Product Code | Universal Circuit Breaker |
| ③ | Design Serial Number | Design Serial Number |
| ④ | Frame Rating Code | 1600, 2000, 3200, 4000, 6300 |
| ⑤ | Number of Poles | 3: 3-Pole, 4: 4-Pole |
| ⑥ | Mounting Type | D: Drawout Type, F: Fixed Type |
| ⑦ | Rated Current | 200~6300A |
| ⑧ | Intelligent Controller | L: Electronic Type, M: Standard Type, H: Communication Type |
| ⑨ | Control Circuit Voltage | AC230V, AC400V, DC220V, DC110V |
Technical Specifications
| Parameter | CQW2-1600 | CQW2-2000 | CQW2-3200 | |
| Rated Current In (A) | 200, 400, 630, 800 1000, 1250, 1600 |
400, 630, 800, 1000 1250, 1600, 2000 |
2000, 2500, 2900, | |
| N-pole Rated Current | 100%In | 100%In | 100%In | |
| Rated Operational Voltage Ue | AC415V/690V | AC415V/690V | AC415V/690V | |
| Rated Frequency f | 50/60Hz | 50/60Hz | 50/60Hz | |
| Rated Insulation Voltage Ui | 1000V | 1250V | 1000V | |
| Rated Impulse Withstand Voltage Uimp | 12kV | 12kV | 12kV | |
| Number of Poles | 3, 4 | 3, 4 | 3, 4 | |
| Total Break Time | ≤30ms | ≤30ms | ≤30ms | |
| Closing Time | ≤70ms | ≤70ms | ≤70ms | |
| Rated Ultimate Short-Circuit | AC415V | 65kA | 80kA | 100kA |
| Breaking Capacity Icu (RMS) | AC690V | 42kA | 65kA | 75kA |
| Rated Service Short-Circuit | AC415V | 55kA | 80kA | 85kA |
| Breaking Capacity Ics (RMS) | AC690V | 35kA | 65kA | 65kA |
| Rated Making Capacity Icm | AC415V | 143kA | 176kA | 220kA |
| (Peak) | AC690V | 88kA | 143kA | 176kA |
| Rated Short-Time Withstand | AC415V | 42kA | 60kA | 85kA |
| Current Icw (RMS) | AC690V | 35kA | 40kA | 55kA |
| Operating Performance (Number of operations) |
Mechanical Life – Maintenance-Free |
10000 | 15000 | 15000 |
| Mechanical Life – With Maintenance |
10000 | 15000 | 15000 | |
| Operating Frequency | 20 operations/hour | 20 operations/hour | 20 operations/hour | |
| Electrical Life – AC415V | 15000 | 15000 | 15000 | |
| Electrical Life – AC690V | 30000 | 30000 | 30000 | |
| Operating Frequency | 60 operations/hour | 60 operations/hour | 60 operations/hour | |
| Control and Protection Unit | L Type (Electronic Type) | |||
| M Type (Standard Type) | ||||
| H Type (Communication Type) | ||||
| Connection Method | Horizontal | |||
| Vertical | ||||
| Standard | IEC60947-2, GB/T14048.2 | |||
| Parameter | CQW2-4000 | CQW2-6300 | |
| Rated Current In (A) | 3200, 3600, 4000 | 4000, 5000, 6300 | |
| N-pole Rated Current | 100%In | 100%In | |
| Rated Operational Voltage Ue | AC415V/690V | AC415V/690V | |
| Rated Frequency f | 50/60Hz | 50/60Hz | |
| Rated Insulation Voltage Ui | 1000V | 1000V | |
| Rated Impulse Withstand Voltage Uimp | 12kV | 12kV | |
| Number of Poles | 3, 4 | 3, 4 | |
| Total Break Time | ≤30ms | ≤30ms | |
| Closing Time | ≤70ms | ≤70ms | |
| Rated Ultimate Short-Circuit Breaking Capacity Icu (RMS) |
AC415V | 100kA | 120kA |
| AC690V | 80kA | 85kA | |
| Rated Service Short-Circuit Breaking Capacity Ics (RMS) |
AC415V | 85kA | 100kA |
| AC690V | 70kA | 75kA | |
| Rated Making Capacity Icm (Peak) |
AC415V | 220kA | 264kA |
| AC690V | 176kA | 187kA | |
| Rated Short-Time Withstand Current Icw (RMS) |
AC415V | 85kA | 100kA |
| AC690V | 70kA | 75kA | |
| Operating Performance (Number of operations) |
Mechanical Life – Maintenance-Free |
6000 | 1000 |
| Mechanical Life – With Maintenance |
3000 | 800 | |
| Operating Frequency | 20 operations/hour | 20 operations/hour | |
| Electrical Life – AC415V | 12500 | 5000 | |
| Electrical Life – AC690V | 25000 | 10000 | |
| Operating Frequency | 60 operations/hour | 60 operations/hour | |
| Control and Protection Unit | L Type (Electronic Type) | ||
| M Type (Standard Type) | |||
| H Type (Communication Type) | |||
| Connection Method | Horizontal | ||
| Vertical | |||
| Standard | IEC60947-2, GB/T14048.2 | ||
Accessory List
| Accessory Name | Parameters | |
| Standard Configuration |
Closing Solenoid | AC230V, AC400V, DC220V, DC110V |
| Shunt Release | AC230V, AC400V, DC220V, DC110V | |
| Energy Storage Motor | AC230V, AC400V, DC220V, DC110V | |
| Auxiliary Switch | 4 changeover contacts (default), 5 changeover contacts, 4NO+4NC, 6NO+6NC | |
| Others | Phase barrier, Door frame, Drawer base three-position lock | |
| Optional Configuration |
Undervoltage Release | AC230V, AC400V |
| Instantaneous, Delayed: 0.5s, 1s, 3s, 5s | ||
| Trip Locking Device | 1 lock + 1 key, 2 locks + 1 key, 3 locks + 2 keys, 6NO+6NC | |
| Mechanical Interlock | For 2 circuit breakers: Linkage interlock (vertical), Cable interlock | |
| For 3 circuit breakers: Linkage interlock (vertical), Cable interlock | ||
| Others | Residual Current Transformer, External Neutral Current Transformer, Relay Module | |
| Communication Module (Profibus-DP), Power Module, Wireless Remote Control Module | ||
Intelligent Controller
| Parameter | CQW2-L | CQW2-M | CQW2-2M |
 |
 |
 |
|
| Basic Functions |
Overload long-time delay protection; Short-time delay short-circuit protection; Instantaneous short-circuit protection; Ground fault protection; Dial switch grading setting; Running current bar graph indication; Test function; Fault recording function; Thermal memory function |
Overload long-time delay protection; Short-time delay short-circuit protection; Instantaneous short-circuit protection; Ground fault protection (differential type); LED digital display; Key setting method; Ammeter function; Test function; Fault recording function; Thermal memory function |
Overload long-time delay protection; Short-time delay short-circuit protection; Instantaneous short-circuit protection; Ground fault protection (differential type); LED digital display; Key setting method; Ammeter function; Test function; Fault recording function; Thermal memory function; Clock function; Self-diagnosis function; Contact pattern and mechanical operation count |
| Optional Functions |
MCR make-break and over-limit tripping; Contact output; 3P+N type neutral protection |
MCR make-break and over-limit tripping; Contact output; Voltage function; Residual current type leakage protection; Clock function; Current unbalance protection; Remote reset function; Load monitoring function; 3P+N type neutral protection; Low voltage ride-through |
MCR make-break and over-limit tripping; Contact output; Voltage function; Residual current type leakage protection; Current unbalance protection; Remote reset function; Load monitoring function; 3P+N type neutral protection; Low voltage ride-through |
| Optional Accessories |
DC Power Module (DC110V/220V) External N-phase Transformer |
DC Power Module (DC110V/220V) External N-phase Transformer Ground Current Transformer ZT100 Residual Current Transformer ZCT1 ST201 Relay Module ST-4 Power Module ST Handheld Programmer |
DC Power Module (DC110V/220V) External N-phase Transformer Ground Current Transformer ZT100 Residual Current Transformer ZCT1 ST201 Relay Module ST-4 Power Module ST Handheld Programmer |
Note:
1.Only one of the following functions can be selected: 3P+N neutral protection, groundcurrent type leakage protection, or residual current leakage protection. The correspondingtransformer accessory must be additionally selected.
2.Only one signal unit (S1, S2, or S3) can be selected.
3.For detailed instructions on the intelligent controller, please refer to the “SW1 Series Intelligent Controller User Manual”.
| Parameter | CQW2-2H | CQW2-3M | CQW2-3H |
 |
 |
 |
|
| Basic Functions |
Overload long-time delay protection; Short-circuit short-time delay protection; Short-circuit instantaneous protection; Ground fault protection (differential type); LED digital tube display; Key setting method; Ammeter function; Fault memory function; Thermal memory function; Clock function; Self-diagnosis function; Contact pattern and mechanical operation count; Communication function |
Load monitoring (current method 1); Multi-curve long-time delay protection; Multi-curve short-time inverse-time protection; Short-time definite-time protection; Instantaneous protection; Current unbalance (phase loss) protection; Ground fault alarm; Ground fault protection (default T-type); Neutral protection; Four-phase current and ground current measurement; Thermal capacity; Eight records of faults, alarms and status changes; Historical current peak; Contact equivalent; Operation count; Clock function; Self-diagnosis; Chinese graphical LCD display; LCD status indicator; Keyboard operation |
Load monitoring (current method 1); Multi-curve long-time delay protection; Multi-curve short-time inverse-time protection; Short-time definite-time protection; Instantaneous protection; Current unbalance (phase loss) protection; Ground fault alarm; Ground fault protection (default T-type); Neutral protection; Four-phase current and ground current measurement; Thermal capacity; Eight records of faults, alarms and status changes; Historical current peak; Contact equivalent; Operation count; Clock function; Self-diagnosis; Chinese graphical LCD display; LCD status indicator; Keyboard operation; Communication function |
| Optional Functions |
MCR make-break and over-limit tripping; Contact output; Voltage function; Residual current type leakage protection; Clock function; Current unbalance protection; Remote reset function; Load monitoring function; 3P+N type neutral protection; Low voltage ride-through |
Function Table: D, U, UD, P, PD, H Select HD from the table (refer to function table description) Signal Unit: S1, S2, S3 Load Monitoring: Current Method 2 3P+N Type Neutral Protection Ground Current Type Leakage Protection Residual Current Type Leakage Protection Remote Reset Function |
Function Table: D, U, UD, P, PD, H Select HD from the table (refer to function table description) Signal Unit: S1, S2, S3 Load Monitoring: Current Method 2 3P+N Type Neutral Protection Ground Current Type Leakage Protection Residual Current Type Leakage Protection Remote Reset Function Profibus-DP Communication Protocol Device-net Communication Protocol |
| Optional Accessories |
DC Power Module (DC110V/220V) External N-phase Transformer Ground Current Transformer ZT100 Residual Current Transformer ZCT1 ST201 Relay Module ST-4 Power Module ST Handheld Programme |
DC Power Module (DC110V/220V) External N-phase Transformer Ground Current Transformer ZT100 Residual Current Transformer ZCT1 ST201 Relay Module Selective Zone Interlocking Protection Device |
DC Power Module (DC110V/220V) External N-phase Transformer Ground Current Transformer ZT100 Residual Current Transformer ZCT1 ST201 Relay Module Selective Zone Interlocking Protection Device |
| D | U | UD | P |
| Demand Measurement(Current) Demand Protection |
Voltage Measurement Frequency Measurement Voltage Unbalance Rate Measurement Phase Sequence Detection Overvoltage Protection Undervoltage Protection Voltage Unbalance Protection Overfrequency Protection Underfrequency Protection Phase Sequence Protection |
Voltage Measurement Frequency Measurement Voltage Unbalance Rate Measurement Phase Sequence Detection Current Demand Measurement Overvoltage Protection Undervoltage Protection Voltage Unbalance Protection Overfrequency Protection Underfrequency Protection Phase Sequence Protection Demand Protection |
Voltage Measurement Frequency Measurement Voltage Unbalance Rate Measurement Phase Sequence Detection Power Measurement Power Factor Measurement Energy Measurement Overvoltage Protection Undervoltage Protection Voltage Unbalance Protection Overfrequency Protection Underfrequency Protection Phase Sequence Protection |
| PD | H | HD |
| Voltage Measurement Frequency Measurement Voltage Unbalance Rate Measurement Phase Sequence Detection Power Measurement Power Factor Measurement Energy Measurement Demand Measurement (Current, Power) Overvoltage Protection Undervoltage Protection Voltage Unbalance Protection Overfrequency Protection Underfrequency Protection Phase Sequence Protection |
Voltage Measurement Frequency Measurement Voltage Unbalance Rate Measurement Phase Sequence Detection Power Measurement Power Factor Measurement Energy Measurement Harmonic Measurement Undervoltage Protection Voltage Unbalance Protection Overfrequency Protection Underfrequency Protection Phase Sequence Protection |
Voltage Measurement Frequency Measurement Voltage Unbalance Rate Measurement Phase Sequence Detection Power Measurement Power Factor Measurement Energy Measurement Demand Measurement (Current, Power) Undervoltage Protection Overvoltage Protection Undervoltage Protection Voltage Unbalance Protection Overfrequency Protection Underfrequency Protection Phase Sequence Protection Reverse Power Protection |
Secondary Circuit Wiring Diagram
Wiring diagram of secondary circuit for SW1-1600-6300 circuit breakers equipped with L/M type intelligent controllers (auxiliary switch default
configuration: 4 changeover contacts)
| Terminal Number | Function Description | Symbol | Explanation | Remarks |
| 1, 2 | Auxiliary power input: AC230V, AC400V, DC220V, DC110V |
SW1 | SW1 Universal Circuit Breaker | Customer self-provided |
| For DC power: 1 is (+), 2 is (-) | S1~S4 | Signal lamp | Customer self-provided | |
| 3, 4, 5 | Fault trip auxiliary contact, contact capacity: AC250V, 3A |
TA | Current transformer | |
| 20 | Grounding (PE) | SAL | Micro switch | Customer self-provided |
| 27, 28 | Undervoltage release | SB1 | Open button | Customer self-provided |
| 29, 30 | Shunt release | SB2 | Close button | |
| 31, 32 | Closing electromagnet | x | Closing electromagnet | |
| 33, 34, 35 | Motor-operated mechanism (motor energy storage), 37 connect green wire, 38 connect black wire, 39 connect red wire |
F | Shunt release | |
| 36~48 | Auxiliary contact terminal | Q | Undervoltage release | |
| M | Motor-operated mechanism | Customer self-provided | ||
| SA | Travel switch of motor-operated mechanism | Customer self-provided | ||
| Fu | Fuse | Customer self-provided | ||
| PE | Grounding | |||
| N | Neutral line (N phase) | |||
| A, B, C | Phase line | |||
| For customer optional use of AX auxiliary switch form | AX | Auxiliary switch | ||
Wiring diagram of secondary circuit for SW1-1600-6300 circuitbreakers equipped with H type intelligent controllers (auxiliary :switch default configuration: 4 changeover contacts)
| Terminal Number | Function Description | Symbol | Explanation | Remarks |
| 1, 2 | Auxiliary power input: AC230V, AC400V, DC220V, DC110V |
SW1 | SW1 Universal Circuit Breaker | Customer self-provided |
| For DC power: 1 is (+), 2 is (-) | S1~S4 | Signal lamp | Customer self-provided | |
| 3, 4, 5 | Fault trip auxiliary contact, contact capacity: AC250V, 3A |
TA | Current transformer | |
| 10, 11 | Communication interface output, 10 is (+), 11 is (-) |
SAL | Micro switch | Customer self-provided |
| 12~15 | DO1, Programmable signal output, contact capacity: AC250V, 3A |
SB1 | Open button | Customer self-provided |
| 14, 15 | DO2, Programmable signal output, contact capacity: AC250V, 3A |
SB2 | Close button | Customer self-provided |
| 16, 17 | DO3, Trip signal output, contact capacity: AC250V, 3A |
X | Closing electromagnet | |
| 18, 19 | DO4, Closing signal output, contact capacity: AC250V, 3A |
F | Shunt release | |
| 20 | Grounding (PE) | Q | Undervoltage release | |
| 21, 22, 23, 24 | Voltage signal measurement, 21 connect N phase, 22 connect A phase, 23 connect B phase, 24 connect C phase |
M | Motor-operated mechanism | |
| 25, 26 | External N-phase transformer input | SA | Travel switch of motor-operated mechanism | Customer self-provided |
| 27, 28 | Undervoltage release | Fu | Fuse | Customer self-provided |
| 29, 30 | Shunt release | PE | Grounding | |
| 31, 32 | Closing electromagnet | N | Neutral line (N phase) | |
| 33, 34, 35 | Motor-operated mechanism (motor energy storage), 37 connect green wire, 38 connect black wire, 39 connect red wire |
A, B, C | Phase line | |
| 36~48 | Auxiliary contact terminal | AX | Auxiliary switch | |
| For customer optional use of AX auxiliary switch form | ST-DP Module |
Required for Profibus-DP communication | ||
| ST-DP Module |
Required for communication function | |||
| ST201 Relay Module |
Required for communication function | |||
Dimensions (mm)
CQW2-1600 Series Fixed Type Overall Dimensions (Unit: mm)
| Rated current | H (mm) |
| 200、400、630 | 6 |
| 800、1000 | 10 |
| 1250、1600 | 18 |
CQW2-1600 Series Drawout Type Installation Dimensions (Unit: mm)
| Rated current | H (mm) |
| 200、400、630 | 6 |
| 800、1000 | 10 |
| 1250、1600 | 18 |
CQW2-1600 Series Fixed Type Overall Dimensions (Unit: mrm)
| In | a (mm) |
| 400~800A | 10 |
| 1000~1600A | 15 |
| 2000A | 20 |
CQW2-1600 Series Drawout Type Installation Dimensions (Unit: mm)
| In | a (mm) |
| 400~800A | 10 |
| 1000~1600A | 15 |
| 2000A | 20 |
CQW2-1600 Series Fixed Type Overall Dimensions (Unit: rnm)
| In | a (mm) | b (mm) |
| 2000,2500A | 20 | 408 |
| 2900~3200A | 30 | 428 |
CQW2-1600 Series Drawout Type Installation Dimensions (Unit: mm)
| In | a (mm) | b (mm) | c (mm) |
| 2000,2500A | 20 | 506 | 552 |
| 2900-3200A | 30 | 526 | 572 |
CQW2-4000 Series Drawout Type (3-Pole) Frame II Increased Capacity Type OvDimensions (Unit: mm)
CQW2-4000 Series Drawout Type (4-Pole) Overall Dimensions (Unit: mm)
CQW2-6300 Series (In=5000A, 4000A) Drawout Type Overall Dimensions (Unit: mm)
CQW2-6300 Series (In=6300A) Drawout Type (3-Pole) Overall Dimensions (Unit: mm)
CQW2 Series Enclosure Door Frame Outline and Irnstallation Dimensions (Unit: mm)
| Model number | a | b | c |
| CQW2-2000 | 304 | 345 | 263 |
| CQW2-3200, 4000/3P | 366 | 405 | 325 |
| CQW2-4000/4P | 304 | 345 | 263 |
| CQW2-6300 | 366 | 405 | 325 |
Why Choose CHAC
With 30+ years of manufacturing experience, 1100+ employees, 100M+ poles
annual capacity and 90% automated production, CHAC provides stable production capacity and strict
quality control for global OEM/ODM customers. Our in-house manufacturing system supports long-term
cooperation for electrical brands, importers and distributors.
30+
YEARS EXPERIENCE
Specialized in low-voltage electrical manufacturing
1100+
EMPLOYEES
Professional team ensures stable quality and delivery
100M+
POLES ANNUAL CAPACITY
Large-scale production capacity to meet global demand
90%
AUTOMATED PRODUCTION
Advanced automation for high efficiency and consistency
Automated Assembly Line
Testing Laboratory
Injection & Stamping
Quality Inspection
Strict quality control system ensures every product meets global standards.
What Can We Customize?
Flexible customization services are available for enclosure dimensions, component configuration,
branding and project requirements.
Enclosure
Design
Customized enclosure sizes, structures and installation details.
Internal
Configuration
Flexible internal layout and component arrangement options.
Branding &
Logo
Private label logos, nameplates and brand identification.
Packaging
Design
Custom cartons, labels, manuals and packaging solutions.
Electrical
Configuration
Tailored electrical setup based on application requirements.
Certification
Support
Support for target-market standards and compliance requirements.
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CQW2 Series Air Circuit Breaker
Complete product overview for low-voltage electrical components and product selection reference.
Need Technical Documents?
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Frequently Asked Questions
Q1. Do you support product customization based on our design requirements?
A1:Absolutely. We specialize in OEM and ODM cooperation in the low-voltage electrical field and have provided customized services for many internationally renowned companies. We offer full-process support, including R&D design, parameter adjustments, and special material selection, ensuring the product fully meets your requirements.
Q2: What is your production capacity and Minimum Order Quantity (MOQ)?
A2: We operate a highly automated production base with an annual output of over 100 million poles for miniature circuit breakers. Our MOQ policy is flexible. We can provide competitive trial orders for small batches and dedicated production capacity guarantee plans.
Q3: What assurances are there for product quality and certifications?
A3: Our main products are certified with CCC, CE, CB, and more, and are sold in over 30 countries and regions worldwide. The company has established a dedicated Quality Operations Center that works with the business and production departments to implement full-process quality control, ensuring products meet international standards.
Q4: Do you have the capability for product R&D and turning concepts into reality?
A4: We have a complete R&D team and digital workshops, backed by extensive customization experience serving numerous international clients. From concept proposal and sample development to mass production, we provide end-to-end technical support to help bring your ideas to life.
