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Composition of Automatic Air Circuit Breaker for Volvo Generator Set

Oct. 11, 2022

The automatic air circuit breaker of Volvo generator set can frequently connect and disconnect the circuit and control the operation of Volvo generator set under the normal operation of the unit, and can automatically disconnect the circuit in case of overload, short circuit or voltage loss of the circuit. Its working performance is safe and reliable.

volvo genset

Volvo generator set automatic air circuit breaker consists of the following parts:

1. Organization

The automatic air circuit breaker is composed of a transmission mechanism and a free tripping mechanism. When closing, the transmission mechanism acts on the free tripping mechanism to turn on the switch. The free tripping mechanism is connected with the contact system and the protection device, and the contact is connected or disconnected through its function.

2. Contact

The contact of automatic switch is usually blocky, and its contact part is inlaid with silver block to reduce the contact resistance. The automatic switch with the general rated current greater than 600A shall be equipped with an arc extinguishing contact to protect the main contact from being burnt by the arc.

3. Arc extinguishing device

The arc extinguishing device of automatic air circuit breaker usually adopts grid arc extinguishing chamber. Because the grid has different shapes of grooves, the arc extinguishing ability is improved. The arc extinguishing chamber is made of asbestos board or clay, which can prevent interphase short circuit caused by flying fox.

4. Tripper

It mainly includes voltage loss release and over-current release.

(1) The voltage loss release is not only used as the tripping actuator, but also used for undervoltage protection.

(2) Overcurrent release is used for overload and short circuit protection. There are two types of over-current release: bimetallic release and electromagnetic release.

The thermal release is an over-current release. Its function is to make the right end of the bimetallic sheet bend downward when the current is overloaded. After a period of time, the switch trips and cuts off the main circuit under the action of the spring.

The function of the electromagnetic release is that in case of short circuit, the short circuit current flows through the coil of the electromagnetic release, generating a strong magnetic field, attracting the armature and tripping the switch.

The thermal releases of DZ10 series automatic air circuit breakers have rated currents of 15A, 20A, 30A, 40A, 50A, 60A, 80A, 100A... 600A, etc. The appropriate thermal releases can be selected according to the working current of the current. The rated current of the electromagnetic release includes 15A, 20A, 25A, 30A, 40A, 50A, 100A, 250A, 400A, 600A, etc. Its action current can be adjusted within the range of 3-10 times of the rated current.

Volvo generator set automatic air circuit breaker is mainly composed of the above parts. It has the advantages of safe operation, high sectioning ability, strong protection function, etc. In case of sudden short circuit failure, it does not need to replace parts. Therefore, it is widely used in the generator set industry.

Starlight Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to sales@dieselgeneratortech.com we will pay highly attention on your question.

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