IUGNF6-34874-30

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Circuit breakers are essential switchgear components in homes and businesses. From residential to industrial applications, circuit breakers allow for rapid and safe shutdown of power grids when necessary. IUGNF6-34874-30 is a popular choice because it combines safety and reliability. Understanding the application field and working principle of IUGNF6-34874-30 can help homeowners and businesses decide if this circuit breaker is the right one for their needs.

Application Field

IUGNF6-34874-30 is a type of molded case circuit breaker (MCCB). These breakers are highly efficient, durable, and offer protection against a variety of electrical faults. They are suitable for use in commercial, industrial, and public spaces, such as schools, hospitals, and offices. As such, they are especially popular for applications that require switches that are UL 1077 compliant.

This type of circuit breaker can be used for the protection of circuits against overload and short-circuits. It offers a reasonable level of protection to people working in dangerous environments. It can also be used in circuits that require frequent monitoring and tripping when used in conjunction with a current transformer.

IUGNF6-34874-30 is made for use in three-phase, four-wire circuits with a rated voltage of 400-415 VAC and a rated short-circuit current of up to 25 kA.

Working Principle

IUGNF6-34874-30 uses a combination of air and vacuum to monitor and break the circuit when necessary. Inside the breaker, two thermal-magnetic trip elements respond to abnormal conditions such as overload or short-circuit events. During normal operation, the air-vacuum chamber holds a pressure of 0.7 bar. When an abnormal condition occurs, the pressure increases and triggers the mechanism to open the contacts.

The thermal trip element uses a bimetallic strip to detect excessive temperatures caused by a high current draw or an overload. This strip responds to the heat and moves towards an electromagnet, activating the circuit breaker. The second trip element is the magnetic trip element, which reacts to an increase in current by producing an electromagnetic field triggering the breaker to break the circuit.

The breaker’s tripping mechanism is based on a fast-acting system and the integrated current transformer to detect overloads or short-circuits. This combination of current transformer and fast-acting tripping system allows the circuit breaker to make an instantaneous shutdown when necessary. It also helps minimize the risk of a fire or electric shock, offering an optimal level of safety.

Conclusion

IUGNF6-34874-30 is a highly reliable molded case circuit breaker. It is suitable for use in three-phase, four-wire circuits with a rated voltage of 400-415 VAC and a rated short-circuit current of up to 25 kA. It is designed to help prevent an overload or short-circuit from occurring and offers an optimal level of safety thanks to its combination of air and vacuum monitoring, thermal and magnetic trip elements, and current transformer. Understanding the application field and working principle of IUGNF6-34874-30 can help ensure that this type of circuit breaker is suitable for a host of applications.

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