LELHK21-71230-100-V

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Circuit Breakers

The LELHK21-71230-100-V is a multi-functional circuit breaker that is widely used in commercial, industrial, and residential settings. It is designed to protect against over-current and excessive voltage surges as well as providing a reliable means to manually shutoff power in the event of an emergency. This versatile circuit breaker is equipped with sophisticated overload, short-circuit, and fault-tolerant features, making it suitable for a variety of applications.

The LELHK21-71230-100-V circuit breaker comprises of five main components, namely the main body, a trip mechanism, a contact system, an internal control system, and a safety shutter. The main body provides a housing for the other components and is designed to dissipate the heat generated by electric current that passes through the system. The trip mechanism is the element that detects electric overload and trips the circuit breaker when a fault or excessive current is detected. The contact system consists of two contact surfaces (usually made up of copper or silver) that are connected when the circuit breaker is operated, thus allowing current to flow. The internal control unit is what allows the user to manually operate the circuit breaker either manually or remotely. Lastly, the safety shutter is a mechanical latch that “locks” the circuit breaker when it senses increased pressure due to a current overload.

The LELHK21-71230-100-V circuit breaker is primarily used in three-phase applications, allowing each phase to be independently protected from over-current and voltage surges. This makes the circuit breaker suitable for use in applications that require the simultaneous protection of three bipolar circuits. The LELHK21-71230-100-V also offers the ability to manually trigger the opening of the contacts in the event of a fault or excess current. This feature makes the circuit breaker well-suited for use in premises with hazardous conditions or in areas prone to electrical faults.

Due to its versatile design the LELHK21-71230-100-V circuit breaker can be applied in a multitude of settings, ranging from residential to high-power industrial locations. It is suitable for applications with three bipolar circuits, such as in electrical panels, in bus bars, or in medium-voltage distribution systems. Additionally, this circuit breaker can be equipped with additional features that allow it to serve in high-pressure air switching applications, allowing it to serve as an alternate means of shutting off the power in hazardous conditions. Additionally, the LELHK21-71230-100-V can be used in control circuits due to the manual momentary triggering feature.

The working principle of the LELHK21-71230-100-V circuit breaker is relatively simple. It is designed to detect faults and abnormal currents and trip the system, which in turn opens the contact surface and isolates the current flow. To manually trigger a circuit breaker, the operator simply needs to push the “trip” button to initiate the shutoff process. The safety shutter then locks onto the mechanism, preventing it from being reset until the fault has been cleared. Once the fault has been cleared, the contact surfaces can be reset and the circuit breaker can be returned to its operational state.

In summary, the LELHK21-71230-100-V circuit breaker is a reliable and highly versatile piece of equipment, suitable for a variety of applications. It provides reliable over-current and voltage surge protection for three bipolar circuits, as well as offering manual shutoff in an emergency. Additionally, the safety shutter feature provides an additional level of protection against electrical faults and hazardous conditions. Therefore, the reliability and flexibility offered by the LELHK21-71230-100-V make it an ideal choice for any installation requiring dependable circuit breakers.

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