Product description
Air circuit breaker is a common power protection device that can be used for overload protection and short-circuit protection in power systems. It consists of the circuit breaker body, operating mechanism, spring mechanism, trigger, electromagnetic tripping mechanism and distribution interval.
The circuit breaker body of the air circuit breaker includes input terminals, output terminals and circuit breaker contacts. The input end is connected to the power supply, and the output end is connected to the load electrical equipment. When the current exceeds the rated current of the air circuit breaker, the circuit breaker contacts will open, thus cutting off the current. Through the operating mechanism, the switching operation of the circuit breaker can be controlled manually or automatically.
A spring mechanism is used to help the circuit breaker's contacts open and close quickly. The trigger triggers the action of the circuit breaker through signals such as current or temperature. For example, when the current is overloaded or a short circuit occurs, the trigger will sense these abnormal signals and trigger the action of the circuit breaker.
The electromagnetic tripping mechanism is to prevent the circuit breaker from automatically disconnecting the current when a fault occurs. When an overload or short-circuit fault occurs in the air circuit breaker, the electromagnetic tripping mechanism will sense the current or voltage signal generated by the fault and automatically trigger the cutting action of the circuit breaker.
Distribution bays are the locations where air circuit breakers are installed, often used to divide power systems into multiple independent electrical circuits to facilitate maintenance and management.
Air circuit breakers have functions such as fast breaking capability, overload protection, and short-circuit protection, which can effectively protect the safe operation of power equipment and electrical circuits. At the same time, air circuit breakers also have the advantages of high reliability, long life, and easy operation, and are widely used in the power field.
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
FAQ
QWhat occasions are AC molded case circuit breakers suitable for?
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.
QWhat is the working principle of AC molded case circuit breaker?
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.
QWhat are the rated parameters of AC molded case circuit breakers?
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.
QHow to choose the appropriate model for AC molded case circuit breaker?
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.
QDoes AC molded case circuit breaker need maintenance?
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.
Bowser Electric
