IELK12-40474-1-V

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Circuit Breakers

Circuit breakers are devices used to protect electrical circuits from overloads and short circuits. The IELK12-40474-1-V is one such circuit breaker and is typically used to protect high-voltage electrical systems. In this article, we\'ll take a closer look at the application field and working principle of the IELK12-40474-1-V circuit breaker.

Application Field:

The IELK12-40474-1-V circuit breaker is designed to protect against overvoltage and overload currents in circuits that carry between 3 and 40 kV of alternating current (AC). It can be used in various applications, including industrial, commercial, and residential settings. The IELK12-40474-1-V is also suitable for use in switchgear designs, providing the necessary protection for the system.

Working Principle:

The IELK12-40474-1-V circuit breaker is an air-blast type circuit breaker. The breaker consists of an air-blast device called an air-break switch. The breaker is operated by a trip unit. When the circuit breaker experiences an overload or short-circuit, the trip unit will actuate the air-break switch, which will rapidly open the circuit, resulting in an interruption of the circuit.

Auxiliary Mechanism:

The IELK12-40474-1-V circuit breaker also contains an auxiliary mechanism. This mechanism is used to provide additional protection against a variety of faults, such as low-voltage, over-voltage, and reversed-phase conditions. The auxiliary mechanism consists of a shunt trip, a thermal overload trip, and a thermal overload trip cover. The shunt trip is designed to operate in conjunction with the trip unit, which will actuate the air-break switch in the event of a fault. The thermal overload trip and thermal overload trip cover are designed to actuate the shunt trip in the event of an overload.

Protection Characteristics:

The IELK12-40474-1-V circuit breaker provides three main protection characteristics. The adjustable long-time protection characteristic is designed to protect the system against long-time overcurrent events. The adjustable instantaneous protection characteristic is designed to protect the system against short-time overcurrent events. Finally, the adjustable reversing power factor protection is designed to protect the system against uneven power factor conditions.

Conclusion:

The IELK12-40474-1-V circuit breaker is a reliable and efficient device designed to protect high-voltage electrical systems against overvoltage and overloads. The device features a variety of protective characteristics and additional mechanisms that ensure maximum protection against a variety of faults.

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