Chinese manufacturers 200 6300A 400 690VAC Air operated Circuit Breaker 3000a air circuit breaker

Product Overview

Description

Product description:

A universal circuit breaker, also known as a frame circuit breaker, is a mechanical switching device that can connect, carry, and break the current under normal circuit conditions, as well as connect, carry, and break the current for a certain period of time under specified abnormal circuit conditions. Universal circuit breakers are used to distribute electrical energy and protect circuits and power equipment from overloads, undervoltages, short circuits, etc.

This type of circuit breaker usually has a steel frame, and all components are installed inside the frame. It has a large capacity and can be equipped with multiple functional releases and many auxiliary contacts. It has high sectioning ability and thermal stability, so it is commonly used in places that require high breaking capacity and selective protection.

The universal circuit breaker is a widely used protective device in the power system, whose main function is to automatically cut off the circuit in case of circuit failure to protect electrical equipment from damage. The application scheme is as follows:

Used in low-voltage distribution systems: Universal circuit breakers can be applied in low-voltage distribution systems to protect important equipment such as generators, transformers, and motors from the effects of short circuits, overloads, and undervoltages. At the same time, it can also be used to achieve remote control and monitoring of low-voltage circuits, improving the operational reliability and safety of the system.

Used in medium voltage distribution systems: Universal circuit breakers can also be widely used in medium voltage distribution systems to protect the safe operation of equipment such as medium voltage buses, distribution transformers, and incoming and outgoing lines. In addition, it can also be used to achieve remote monitoring and control of medium voltage distribution systems, reduce manual management costs, and improve system operational efficiency.

Used in high-voltage distribution systems: Universal circuit breakers can also be used in high-voltage distribution systems to protect the safe operation of important components such as high-voltage switchgear, capacitors, cables, and overhead lines. Moreover, it can also be used for remote monitoring and control of high-voltage power grids, improving the reliability and work efficiency of the system.

Used for power product testing: Universal circuit breakers can also be applied in the testing of power products in manufacturing enterprises, such as frequency converters, UPS and other electrical equipment. In this process, the universal circuit breaker can use its highly automated characteristics to quickly detect the existence of various electrical faults and provide high-quality electrical products for enterprises.

In summary, the universal circuit breaker is a widely used power protection device with multiple application schemes, which can play an important role in low-voltage, medium voltage, high-voltage distribution systems, and power product testing, thereby improving the reliability and safety of the power system.

The intelligent universal circuit breaker is suitable for distribution networks with AC 50Hz, rated voltages of 380V and 660V, and rated currents of 200A-6300A. It is mainly used to distribute electrical energy and protect lines and power equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. The circuit breaker has multiple intelligent protection functions, which can achieve selective protection, precise action, avoid unnecessary power outages, and improve power supply reliability. Under normal conditions, it can be used for infrequent switching of lines. Circuit breakers below 1250A can be used to protect motors from overload and short circuits in networks with an AC 50Hz voltage of 380V. Under normal conditions, it can also be used for infrequent starting of electric motors

 

 

 

Product features:

It has the characteristics of intelligent, high breaking, and zero flashover.

It has 3 and 4 poles, drawer type and fixed type, and can be installed with inverted wires.

It has multiple intelligent controllers, providing three/four section protection functions, monitoring functions, fault memory functions, and can be equipped with communication interfaces to achieve four remote functions such as telemetry, remote signaling, remote control, and remote adjustment.

Comply with standards such as IEC60947-2 and GB/T14048.2.

The protection features are complete, easy to set, and high in accuracy, with instantaneous, short delay, long delay, single-phase grounding and other protection characteristics. The current ranges from 200A-6300A and the short-circuit breaking capacity is 50kA-135kA.

 

 

 

Product parameters:

 

 

 

Product usage environment:

1. The upper limit of the ambient air temperature shall not exceed+40 ℃, the lower limit shall not be less than -5 ℃, and the average value within 24 hours shall not exceed+35 ℃.

2. The installation location shall not exceed 2000m above sea level.

3. The relative humidity of the atmosphere shall not exceed 50% when the surrounding air temperature is+40 ℃; There can be higher relative humidity at lower temperatures; The monthly average maximum relative humidity in the wettest month is 90%, and the monthly average minimum temperature in that month is+25 ℃, taking into account the frost that occurs on the product surface due to temperature changes.

4. Pollution level: Level 3

5. Installation conditions: Can be installed vertically or horizontally

6. Installation category: Circuit breaker main circuit and undervoltage breathable air connection, installation category of primary coil of power transformer is IV, installation category of other auxiliary circuits and control circuits is III

 

 

        

Product details:

 

     

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FAQ:

Q: What occasions are AC molded case circuit breakers suitable for?
Answer: AC molded case circuit breakers are suitable for AC circuit protection in various construction, industrial and commercial places, including low-voltage distribution systems, building electrical distribution systems, factories and mechanical equipment, etc.

Q: What is the working principle of AC molded case circuit breaker?
Answer: The working principle of AC molded case circuit breaker is to realize the circuit protection function through thermal magnetic protection and electromagnetic protection. When a circuit is overloaded or short-circuited, the circuit breaker senses abnormal current flow through a thermomagnetic element and cuts off the circuit.

Q: What are the rated parameters of AC molded case circuit breakers?
Answer: The rated parameters of AC molded case circuit breaker include rated current, rated voltage and rated circuit breaking capacity. The rated current refers to the maximum current value that the circuit breaker can operate normally. Rated voltage refers to the maximum voltage that the circuit breaker can withstand. Rated circuit breaking capacity refers to the maximum short circuit current that the circuit breaker can interrupt.

Q: How to choose the appropriate model for AC molded case circuit breaker?
Answer: The following factors need to be considered when selecting a suitable AC molded case circuit breaker model: load current, rated voltage, load type (such as lamps, motors, etc.), ambient temperature, short-circuit current and rated breaking capacity requirements, etc. You can select the appropriate model based on these factors by referring to the technical specifications of the circuit breaker and the selection table provided by the manufacturer.

Q: Does AC molded case circuit breaker need maintenance?
Answer: Yes, AC molded case circuit breakers require regular maintenance to ensure their normal operation. Maintenance includes cleaning the casing, checking the flexibility of the operating mechanism, checking whether the wiring is loose, checking the tightening of the circuit breaker bolts, etc. At the same time, electrical performance testing should also be performed regularly to ensure that the circuit breaker is functioning properly.
Please note that the above are general answers and specific questions and answers may vary based on actual circumstances. If you have specific questions, please let me know and I will try to provide you with a more detailed answer.