IELHR11111-33482-1

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Circuit breakers are widely used in electrical systems of all kinds to control, protect, and isolate electrical circuits from faults or overloads. One kind of circuit breaker is the IELHR11111-33482-1 circuit breaker, a medium voltage switchgear with an integrated short-circuit breaking function. In this article, we will discuss the application field and working principle of the IELHR11111-33482-1 circuit breaker.The IELHR11111-33482-1 circuit breaker is applicable in medium voltage (MV) power distribution systems. It is designed for use in industrial and utility applications, replacing existing switchgear or providing new installations with circuit breaker protection. It is suitable for both indoor and outdoor applications, and it is compatible with capacitive loading and interrupting currents up to 22000 A at 12 kV and 17000 A at 24 kV.The working principle of the IELHR11111-33482-1 circuit breaker is based on the arc-extinction principle. When a fault occurs, an arc is generated between the contacts of the circuit breaker. This arc is then extinguished by an arc chute or arc chamber system, which breaks the circuit and prevents current from flowing through it. This arc chute or arc chamber system utilizes a combination of methods such as quenching by a gas or vapor, cooling by air, and contact separations. To ensure that the arc is always extinguished before the contacts are brought together again, the IELHR11111-33482-1 circuit breaker incorporates an overpressure function and a short-circuit drive mechanism.The overpressure function of the IELHR11111-33482-1 circuit breaker works as follows:During an overcurrent condition, the circuit breaker moves the contacts away from each other and vents the arc into the arc chamber, where the pressure and volume of the arc are regulated. This increases the amount of time it takes for the arc to extinguish, which reduces the likelihood of the contacts re-igniting.The short-circuit drive mechanism of the IELHR11111-33482-1 circuit breaker works as follows:During a short-circuit condition, the force of the short circuit pushes the contacts of the circuit breaker further apart, which increases the distance between the contacts and reduces the likelihood of re-ignition.The IELHR11111-33482-1 circuit breaker also contains several other components to ensure safety, such as a current transformer, a voltage transformer, a protection relay, and a control unit. The current transformer helps to measure and monitor the current running through the circuit, while the voltage transformer helps to measure the voltage levels. The protection relay, when triggered by a fault or overload, activates the circuit breaker and shuts off the current to the circuit. The control unit is designed to control and monitor the current running through the circuit, thereby ensuring that the circuit is never overloaded.In summary, the IELHR11111-33482-1 circuit breaker is a medium voltage switchgear with an integrated short-circuit breaking function for use in industrial and utility applications. It utilizes the arc-extinction principle to break the circuit in case of a fault or overload. The IELHR11111-33482-1 circuit breaker also contains several other components to ensure safety, such as a current transformer, a voltage transformer, a protection relay, and a control unit.

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