Views: 26 Author: Site Editor Publish Time: 2022-12-26 Origin: Site
low voltage circuit breakers are also called automatic air switches or automatic air circuit breakers. The low voltage circuit breakers sold on the market can not only be switched manually, but also equipped with automatic switching. If a short circuit occurs in the circuit or the current is too high, it can automatically interrupt the circuit and take on a protective function in time.
What is the main structure and function of the low voltage circuit breaker?
What are the main components of the low voltage circuit breaker?
What are the precautions for using low voltage circuit breakers?
1.Accessories for low voltage circuit breakers such as working current trigger, undervoltage trigger, electric drive, etc.; Shunt and undervoltage are voltage coils, as long as the voltage values are the same, they are used for AC systems, not AC systems. It can be used in DC systems without changes. Auxiliary, alarm contacts, AC and DC mass. The electric drive must be redesigned for DC operation.
2.Since the DC current does not have the zero-pass characteristics of alternating current, the interruption of DC short-circuit current (even the residual current with a small multiple); Erasing the arc is difficult, so the wiring should be connected two-pole or three-pole in series. increase the fracture so that each fracture carries part of the arc energy.
3.low voltage circuit breaker In addition to the traditional thermal magnetic trigger, the electronic trigger is also widely used. An important advantage of the electronic trigger is that it can operate stably even with changes in ambient temperature.
1. Contact
The contacts mechanically connected to the opening and closing mechanism of the main circuit of the low voltage circuit breaker are mainly used to indicate the opening and closing state of the circuit breaker, and are connected to the control circuit of the circuit breaker, to implement the opening and closing of the circuit breaker to the associated electrical appliances. Control or locking. For example, output signals on signal lamps, relays, etc.
2. Release
The working current trigger is a remote-controlled opening accessory. The under voltage trigger is used to automatically disconnect the low voltage circuit breaker to interrupt the power supply when a certain voltage drop in the power supply voltage occurs in the protected circuit, so that the electrical load equipment or electrical equipment below the circuit breaker is protected from under voltage damage.
3. Electric drive
It is an accessory for circuit breakers for automatic opening and closing over long distances. There are two types of electric drives: motor drive and electromagnetic drive.
Since direct current does not have zero-pass characteristics such as alternating current, it is difficult to interrupt the short-circuit current of direct current (even the residual current with a small multiple); It is difficult to extinguish the arc, so the wiring should apply the method of two-pole or three-pole series connection to increase the fracture, so that each fracture carries part of the arc energy.
In addition to the traditional thermal magnetic trigger, the electronic trigger is also widely used. An important advantage of the electronic trigger is that it can operate stably even with changes in ambient temperature.
JIELI Electrical has been active in the low voltage circuit breaker industry for almost twenty years. Dedicated to research and development, production and supply chain management of MCB, RCCB and related supporting products.
