Chint NKB1-45 Control and Protective Switching Device (CPS)

The Chint NKB1-45 is a **Control and Protective Switching Device (CPS)** mainly used for motor protection and industrial power distribution systems. It integrates functions such as circuit breakers, contactors, overload protection, and leakage protection, and is suitable for circuits with an alternating current of 50Hz and a rated voltage of up to 400V. The following are the detailed information: 

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I. Product Type and Technical Parameters

1. **Functional Features**

   - **Protection Functions**: It supports overload, short circuit, phase failure, three-phase current imbalance, and residual current (leakage) protection. Some models also have functions such as fire protection isolation and communication interfaces (such as RS485).Schneider LRD Thermal Relay Price

   - **Operation Modes**: Manual or electric operation, suitable for motor control scenarios with frequent start and stop.

   - **Structural Design**: Modular structure, which can flexibly combine different functional modules (such as leakage modules and communication modules), making installation and maintenance convenient.

2. **Key Parameters*Schneider Circuit Breakers price*

   - **Rated Current**: Ranging from 1A to 45A (such as NKB1-45 1A, 12A, 16A, 45A and other models).

   - **Rated Voltage**: 230V (single-phase) or 400V (three-phase).

   - **Number of Poles**: 2P (single-phase) or 3P (three-phase).

   - **Residual Operating Current**: Usually 30mA or 100mA (for leakage protection type).

   - **Tripping Characteristics**: In line with the standards of GB/T 14048.4 and IEC 60947-4-1, supporting C-type (power distribution protection) or D-type (motor protection) tripping curves.CHINT surge protector price

3. **Certifications and Standards*CHINT circuit breaker price**

   - It complies with Chinese national standards (GB) and International Electrotechnical Commission standards (IEC), but **UL certification is not explicitly mentioned**. If export to the United States is required, it is recommended to contact Chint to confirm whether there are models that meet UL standards (such as customized models like NKB1-45Y/L25/06QLG).

 II. Application Scenariosmolded case circuit breaker  Price

- **Industrial Field**: Motor control (such as pumps, fans, compressors), production line power distribution, and protection of automated equipment.

- **Commercial and Civil Use**: Control of fire pumps and emergency power supply systems in high-rise buildings, shopping malls, hospitals, and other places.

- **Special Requirements**: Scenarios that require leakage protection, communication monitoring, or fire protection linkage (such as NKB1-45 with fire protection + communication + isolation functions).

 III. Procurement Information and Suppliers

1. **Price Reference**

   - **Domestic Market**:

     - **Basic Type (such as 12A 400V isolation type)**: Approximately WA：0086-13811255435 yuan per piece, and about WA：0086-13811255435 yuan for a set of 12 pieces.

     - **High-end Type (such as 16A 230V fire protection + communication + isolation type)**: Approximately WA：0086-13811255435 yuan per piece.

2. **Purchase Channels**

   - **Domestic**: Suning.com, Alibaba, and Chint's official online store.

   - **United States Region**:

     - Chint has subsidiaries and a distributor network in the United States. You can obtain information about authorized distributors through the "Contact Us" page on the official website or by calling the international customer service hotline (Whatsapp: 0086-13811255435).

3. **Delivery Time**

   - For domestic in-stock products, it usually takes 1-3 working days. For customized models or bulk purchases, it takes 7-15 working days.

   - In the United States, cross-border logistics may be involved, and the delivery time is approximately 2-4 weeks. The specific time shall be subject to the feedback from the distributor.

 IV. Alternative Models and Compatibility

1. **Similar Products of Chint**

   - **NKB1-D Series**: It supports intelligent communication and remote control, and is suitable for Internet of Things power distribution systems.

   - **NKB1-Z Series**: Enhanced fire protection special models, in line with the GB 14287.3-2014 standard.

   - **NJBK1 Series**: Motor protectors with relatively single functions and no integrated contactors.

2. **Other Brands**

   - **Schneider TeSys Series**: TeSys GV2-PM, with a rated current of up to 40A, supports overload protection.

   - **ABB Tmax Series**: Tmax XT, with a modular design, suitable for complex power distribution systems.

 V. Precautions

1. **Certification Compliance**

   - In the US market, it is necessary to confirm whether the product has passed the UL certification. Some Chint products (such as combined transformers) have passed the UL certification, but the UL status of NKB1-45 is not clear. It is recommended to contact Chint's technical support (Whatsapp: 0086-13811255435) to confirm.

2. **Model Selection Suggestions**

   - Select the appropriate model according to the load type (motor/power distribution), current requirements, and environmental conditions (such as temperature and humidity).

   - In fire protection scenarios, select the "fire protection type" (such as NKB1-45 fire protection + isolation type) to ensure reliable operation in case of a fire.

3. **Installation and Maintenance**

   - It should be installed by a professional electrician to ensure firm wiring and good grounding.

   - Regularly check the tripping characteristics and contact wear conditions, and replace the modules if necessary.

VI. Contact Information

If you need to obtain **preferential quotations** or **technical support**, you can contact us in the following ways:

- **Whatsapp: 0086-13811255435**

- **Chint International**:

  - Official website: [www.transformerandswitchgear.com)

  - US Whatsapp: 0086-13811255435

It is recommended to provide specific requirements (such as voltage, current, and functional modules) to obtain an accurate quotation and confirm the inventory and delivery time.

What are the detailed technical parameters of the Chint NKB1-45 residual current operated circuit breaker?

As a Control and Protective Switching Device (CPS), the Chint NKB1-45 residual current operated circuit breaker (RCCB) integrates functions such as circuit breakers, contactors, overload protection, and leakage protection, and is suitable for circuits with an alternating current of 50Hz and a rated voltage of up to 400V. The following is a comprehensive description of its detailed technical parameters and key features:

 I. Core Technical Parameters

1. **Rated Current and Voltage**

- **Current Range**: Ranging from 1A to 45A (such as NKB1-45 C/M1/06QG, C/M12/06MFG and other models).

- **Voltage Specifications**:

  - **Single-phase**: 230V (such as NKB1-45 16A 230V communication + isolation type).

  - **Three-phase**: 400V (such as NKB1-45 12A 400V leakage + isolation type).

2. **Residual Current Protection Characteristics**

- **Rated Residual Operating Current (In)**: 30mA (for personal electric shock protection) or 100mA (for electrical fire protection), supporting hierarchical protection.

- **Rated Residual Non-operating Current (Ino)**: 15mA (for the 30mA model) or 50mA (for the 100mA model), ensuring that normal leakage current does not trigger tripping.

- **Operating Time**:

  - **Instantaneous Type**: ≤0.1 second (suitable for direct contact protection).

  - **Time-delay Type**: 0.1-1 second (suitable for indirect contact or fire protection scenarios).

3. **Short Circuit Breaking Capacity**

- **Ultimate Breaking Capacity (Icu)**: Depending on the model, it is usually 36kA (economical type) to 50kA (standard type), and some high-end models can reach 70kA.

- **Service Breaking Capacity (Ics)**: Usually 50%-70% of Icu (for example, Ics = 36kA corresponding to Icu = 50kA).

4. **Tripping Characteristics**

- **Overload Protection**: Supports an inverse time curve (such as F1-F4), and the operating time at 1.5 times the rated current is 51-200 seconds, which can be self-tuned through the controller.

- **Short Circuit Protection**: Instantaneous tripping (10-14 times the rated current) or short time-delay (0.1-0.4 seconds), in line with the GB/T 14048.4 standard.

II. Functional Modules and Structural Design

1. **Modular Configuration**

- **Basic Functions**: Circuit breaker, contactor, overload relay, and leakage protection.

- **Optional Modules**:

  - **Communication Interface**: RS485 (supporting the Modbus protocol, such as NKB1-45 16A 400V communication + isolation type).

  - **Fire Protection Isolation**: Cut off non-fire protection power supply in case of a fire, in line with the GB 14287.3 standard.

  - **Auxiliary Contacts**: Provide feedback of the switch status signal.

2. **Installation and Wiring**

- **Installation Methods**:

  - **Rail Installation**: 35mm standard rail, supporting quick plug-in.

  - **Front/Back Panel Wiring**: Connected by screws or busbars, supporting various wiring methods.

- **Size Specifications**: Width from 45mm (single pole) to 135mm (three poles), height 120mm, depth 80mm.

3. **Environmental Parameters**

- **Operating Temperature**: -5°C to +40°C.

- **Humidity**: ≤95%RH (without condensation).

- **Altitude**: ≤2000 meters (derating is required for use).

 III. Certifications and Compliance

- **Domestic Certifications**:

  - **CCC Certification**: In line with the GB 14048.2 (circuit breaker) and GB 16917.1 (residual current operated circuit breaker) standards.

- **International Certifications**:

  - **CE Certification**: Some models have passed the EU certification (the specific model needs to be confirmed).

  - **UL Certification**: Some Chint products have passed the UL certification, but the UL status of NKB1-45 is not clear. It is recommended to contact Chint's technical support to confirm.

 IV. Typical Models and Parameter Differences

 V. Model Selection and Procurement Suggestions

1. **Key Model Selection Points**

- **Load Type**: Select the D-type tripping curve for motors and the C-type for power distribution.

- **Residual Current Requirements**: Select 30mA for personal protection and 100mA for electrical fire protection.

- **Environmental Conditions**: Derating is required for use in high-temperature environments, and special customization is required for high-altitude areas.

2. **Procurement Channels**

- **International**: Chint USA Corporation (Whatsapp: 0086-13811255435) or authorized distributors.

3. **Delivery Time**

- **In-stock Products**: 1-3 working days (domestic).

- **Customized Models**: 7-15 working days (inventory needs to be confirmed).

 VI. Precautions

1. **Certification Compliance**: Confirm the UL certification for export to the United States, and select the "fire protection type" model for fire protection scenarios.

2. **Installation Specifications**:

   - It should be installed by a professional electrician to ensure good grounding.

   - The wiring torque should meet the requirements of the instruction manual (usually 2.5-4N·m).

3. **Maintenance Suggestions**:

   - Regularly test the leakage protection function (press the test button once a month).

   - Check the contact wear conditions, and replace the modules if necessary.

If you need to obtain the detailed parameters or quotations of specific models, you can contact us in the following ways:

- **Whatsapp: 0086-13811255435**

- **Chint International Customer Service**: Whatsapp: 0086-13811255435