400V/690V 1600A/7500A ACB Air Circuit Breaker MCB Circuit Breaker factory and building
1. General
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Air circuit breaker is a circuit breaker for the purpose of protecting low voltage circuit, mainly for energizing and cutting off high current.
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It is used as the master of a factory and building, and as a main circuit breaker of a ship, and it is possible to attach various accessories according to the purpose.
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We also have a draw-out installation method with high maintainability.
2. Main Technical Data
| Brand Name | CHINT |
| Model Number | NA8 |
| Rated Voltage | 380V/400V/415V,690V |
| Rated Frequency | 50/60hz |
| Number of poles | 3P/4P |
| Rated operational voltage Ue | 380V/400V/415V,690V |
| Rated insulation voltage | 1000V/1140V |
| Rated impulse withstand voltage | 12KV |
| Rated frequency | 50/60 Hz |
| Flashover distance | 0mm |
| Rated current | 200A~2500A |
| Rated current of the N pole | 200A~2500A |
| Rated voltage | 380V/400V/415V, 690VAC |
| Mounting mode | draw-out type or fixed type |
Product overview
A circuit breaker is one kind of electric device, used to break any circuit manually otherwise through remotely under normal circumstances. The main function of a circuit breaker or CB is to break a circuit in some fault conditions like a short circuit, over-current, etc. Generally, a circuit breaker switches or protects the system. Some devices are associated with circuit breakers such as relays; switches, fuses, etc are also used for the same purpose. The applications of circuit breakers mainly include power systems and industries for protecting as well as controlling various parts in the circuit namely transformers, switch gears, motors, alternators, generators, etc. There are different kinds of circuit breakers used in industries where the air circuit breaker is one type. Air Circuit Breaker (ACB) is an electrical device used to provide Overcurrent and short-circuit protection . These are usually used in low voltage applications below 690V. We can find these systems in Distribution Panels (below 690V).
An air circuit breaker is a circuit operation breaker that operates in the air as an arc extinguishing medium, at a given atmospheric pressure. There are several types of air circuit breakers and switching gears available in the market today that are durable, high-performing, easy to install and maintain. The air circuit breakers have completely replaced oil circuit breakers.The construction of an air circuit breaker can be done by using different internal .
The external parts of ACB mainly include the ON & OFF button, an indicator for the position of the main contact, an indicator for the mechanism of energy storage, LED indicators, RST button, controller, rated nameplate, handle for energy storage, displays, shake, fault trip rest button, rocker repository, etc.
The internal parts of ACB mainly include supporting structure with steel sheet, the current transformer used to protect the trip unit, pole group insulating box, horizontal terminals, arcing chamber, trip unit for protection, terminal box, closing springs, CB opening & closing control, plates to move arcing and main contacts, plates for fixed main & arcing contacts
