Product details

Product Overview:

The CHB series control and protection switchgear is a new type of product in low-voltage electrical appliances. It is the first generation of products developed in China in the 1990s to fill the domestic gap. Its product category code is "CPS", which is written in English as "Control and Protective Switching Device". It complies with the standards of EC60947-6-2 (1997) "Low Voltage Switchgear and Control Equipment Part 6: Multifunctional Electrical Appliances Section 2: Control and Protection Switchgear" (first edition in August 1992) and GB14048.9-1998 "Low Voltage Switchgear and Control Equipment Multifunctional Electrical Appliances (Equipment) Part 2: Control and Protection Switchgear (Equipment)" (equivalent to IEC60947-6-2).). The codes and electrical symbols specified in IEC standards and national standards are shown in the following figure.

The CHB series control and protection switchgear achieves integrated and internally coordinated control and protection functions on a single structure product, which can replace various traditional separate components such as circuit breakers (fuses), contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators, etc. It has the function of remote automatic control and local manual control for control operation, coordinated time current protection characteristics, control and protection coordination, continuous operation after short circuit, high breaking ability, and small arcing distance. Long lifespan, with adjustable protection setting current, easy operation, and a variety of complete accessory modules, it can achieve control and protection of motor loads and distribution loads.

The emergence of multifunctional electrical appliances fundamentally solves the problems of unreasonable control and protection coordination caused by the traditional use of separate components (usually circuit breakers or fuses+contactors+overload relays) due to improper selection. Especially, it overcomes the phenomenon of inconsistent protection characteristics and control characteristics when combining electrical products with different assessment standards, greatly improving the operational reliability and continuous performance of control and protection systems.

The first generation of CHB series control and protection switchgear products have a relatively large volume and use bimetallic strip technology for protection. Although the second-generation product solved the problem of large size, there was no significant breakthrough in protection technology. With the increasing application and deepening of microelectronics technology in the low-voltage electrical industry, based on the latest microelectronics technology, we are taking the path of high-end product design, investing heavily in the development of products with international advanced level, gathering the advantages of discrete components, complete functions, and reliable performance, providing a basic component for the simplification and optimization of low-voltage distribution and control systems.

Model meaning:

The complete structure and model of the basic type should include: main body model+rated current and breaking capacity level of the main release, release, product function, control power supply and accessories. The meanings of each part of the product model are as follows:

Function for purpose：

CHB adopts a modular single product structure, integrating traditional circuit breakers (fuses), contactors, overload (or overcurrent, phase failure) protection relays, starters, isolators and other main functions. It has remote automatic control and local manual control functions, panel indication and electromechanical signal alarm functions, overvoltage and undervoltage protection functions, phase failure and phase loss protection functions, and coordinated time current protection characteristics (with inverse time limit, timed limit and instantaneous three-stage protection characteristics). Functional modules or accessories can be selected as needed to achieve control and protection of various motor loads and distribution loads. CHB is mainly used for AC 50HZ (60H2), rated voltage up to 690V, rated current from 1A to 125A, and can Adjust the working current from 0.4A to 100A Connect, carry, and disconnect current under normal conditions (including specified overload conditions) in the power system, and be able to connect, carry, and disconnect current under specified abnormal conditions (such as short circuits).

Applicable fields：、

Due to the integrated, modular, and miniaturized structure of CHB series products with control and protection functions, high protection level against environmental pollution, high ability to break short-circuit current, short arcing distance, long electrical life, complete protection functions, high continuous operation performance and reliability, and convenient installation, use, and maintenance operations, they are particularly suitable for the following systems:

1. Distribution and motor protection and control systems in metallurgy, coal mining, steel, petrochemicals, ports, ships, railways and other fields;

2. Electrical control and protection series for lighting, power conversion, pumps, fans, air conditioning, fire protection, lighting, etc. in modern buildings;

3. Motor Control Centers (MMC), especially intelligent electrical control systems or distribution control and protection systems that require a rated breaking capacity of up to 80kA;

4. Single motor control and protection system in factories or workshops;

5. Remote control of lighting system.