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Air Circuit Breaker It Is Important To Select The Rated Capacity Current Size Correctly
Nov 03, 2017

Air Circuit Breaker, full name automatic air Air Circuit Breaker, also known as Air Switch, is a commonly used low-voltage protection apparatus, can realize short-circuit, overload and other functions.

The Air Circuit Breaker is used in the home power supply for the total power protection switch or the branch protection switch. When a home line or household appliances short-circuit or overload, it can automatically trip, cut off the power, so as to effectively protect the equipment from damage or prevent the accident from expanding. The family generally uses a bipolar (i.e. 2P) Air Circuit Breaker for total power protection and is protected by a unipolar (1P) branch. Air Circuit Breaker rated current if the selection of small, the Air Circuit Breaker prone to frequent tripping, caused by unnecessary power outages, such as the choice of too large, then can not achieve the desired protection effect, so home Air Circuit Breaker, the correct choice of rated capacity current size is very important.

For the alarm contact of the breaker accident, and the contact only moves when the breaker is pulled off, mainly used for Air Circuit Breaker load overload short-circuit or undervoltage, such as the failure of free to take off, alarm contact from the original open position into a closed position, connected to the auxiliary line led or bell, buzzer, etc. Displays or reminds of the fault-tripping status of the breaker. As a result of the failure of the Air Circuit Breaker and free to take off the probability of not too much, so the alarm contact life is a Air Circuit Breaker life of 1/10. The working current of the alarm contact is generally not more than 1A.

Shunt-Tripping device: The shunt-tripping device is a kind of tripping device which is stimulated by a voltage source, and its voltage is independent of the main circuit voltage. The shunt-tripping device is an accessory of a long distance control gate. When the power supply voltage equals any voltage between 70%-110% of the rated control power supply voltage, it can reliably break the breaker. The shunt is the Short-time work system, the coil power time generally cannot exceed 1S, otherwise the line will be burned. Molded case Air Circuit Breaker in order to prevent the coil from burning, in the shunt-Tripping coil in Series A micro-switch, when the shunt-tripping device through the armature absorption, micro-switch from the regular closed state conversion to often open, because the control circuit of the power of the shunt tripping device is cut off, even if the press button, the shunt coil will never again power this avoids the coil burn damage situation. When the breaker is closed again, the micro-switch is again in a constant position.

Undervoltage off-voltage tripping device: When the voltage drop is lowered to a specified range, a type of tripping device that causes a Air Circuit Breaker to have a delay or no delay, and when the power supply voltage drops (or even slows down) to a range of 70% to 35% of the rated operating voltage, the undervoltage tripping device shall operate, When the voltage of the undervoltage is equal to 35% of the rated operating voltage of the tripping device, the undervoltage tripping device should be able to prevent the Air Circuit Breaker from closing; when the power supply voltage equals or exceeds the rated operating voltage of 85% undervoltage tripping device, the Air Circuit Breaker can be reliably closed under thermal condition.

Household Air Circuit Breaker Air switch selection Air Circuit Breaker, full name automatic air Air Circuit Breaker, also known as Air Switch, is a commonly used low-voltage protection appliances, can realize short-circuit, overload and other functions. The Air Circuit Breaker is used in the home power supply for the total power protection switch or the branch protection switch. When the home line or household electrical appliances occur short-circuit or overload, it can automatically trip, cut off power, thereby effectively protecting the equipment from damage or prevent accidents from expanding; the household generally uses the bipolar (ie. 2P) Air Circuit Breaker as the total power supply protection, and uses the unipolar (1P) as the branch protection;