APGH266-9739-4

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Circuit breakers are an important part of any electrical system, serving a vital function in managing the electricity supply, ensuring the safety of electrical systems and avoiding power outages. The APGH266-9739-4 is an automatic air-circuit breaker used to protect electrical systems from dangerous overloads or short circuits. Let’s explore this device’s application field and working principle.

Application Field

The APGH266-9739-4 is a high end air-circuit breaker of a compact construction. It is designed to protect transformers, power distribution systems, motors, capacitors and other electrical equipment. This particular circuit breaker has an insulated frame, with an adjustable load-breaking capacity that can be used with low and medium voltage electrical systems. It is designed to automatically cut off power in the event of an electrical overload or short circuit, thus preventing further damage.

Working Principle

The APGH266-9739-4 circuit breaker is composed of a contact bridge, an insulation casing, and a coil. The contact bridge is made up of two opposing metal contacts, one fixed contact and one moveable contact. The insulation casing provides protection to both the power source and the equipment being served.When a short circuit occurs, an electric current flows along the circuit breaker and creates a magnetic field in the surrounding area. This magnetic field causes the two contacts to move and break the connection, thus protecting the equipment from further damage. The circuit breaker also has an adjustable load-breaking capacity that can be used according to the specifications of the equipment being protected.In the event of an overload, an overcurrent relay interrupts the electric current, causing the circuit breaker to trip. The breaker can then be reset and the current re-established when the load on the equipment has decreased.The APGH266-9739-4 can also be used to protect alternating current systems from nearby lightning strikes, as the arc extinguishing characteristics of the device make it highly suitable for such applications.

Conclusion

The APGH266-9739-4 is a robust and reliable air-circuit breaker, designed to provide protection in a wide range of applications. Its adjustable load-breaking capacity and arc extinguishing characteristics make it perfectly suited for protection against dangerous electrical overloads, short circuits, and even lightning strikes.

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