LEL11-31699-1-V Circuit Protection

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Circuit breakers are vital components of electrical systems. In essence, these devices are an electrically operated switch that will detect a fault or overload of the system, then automatically disconnect and reset the system. The LEL11-31699-1-V circuit breaker is a two-pole, 3-phase AC system, designed for protection of low voltage installations.

This circuit breaker has trip-free mechanical latching, a thermal-magnetic operating system, and uses a non-removable core rod. Further, the CB is able to survive up to 3kA, short-time current. The main advantages of this CB are the small size, light weight, fast operating speed, and high mechanical strength.

The typical application field for the LEL11-31699-1-V is domestic, commercial, and industrial AC networks, as well as solar photovoltaic, motor insulation, and instantaneous current protections in polymeric and ceramic industries. This CB is particularly suitable for installations with high variation in capacities, and buildings where replacing older, bulky CBs is not feasible nor desirable.

The working principle of the CB can be broken down into two main types. The thermal-magnetic release works through two types of current release systems: one is magnetic, the other thermal. For the thermal part, the CB has a bimetallic strip that reacts to the heat caused by an overcurrent flow, gradually moving the contact lever down to a `release\' (open) position. The magnetic release relies on a coil when an overcurrent passes through, inducing a force within the coil and pushing the lever down to a `release\' (open) position.

The two systems work together to provide a range of current release premiums. The first system is the magnetic component, impacting on the instantaneous release, and the second system is the thermal component, impacting on the controlled release. Typically, the thermal-magnetic CB is designed to trip during short-circuit currents, limiting the range of the current intensity as it travels through the system.

The design of the LEL11-31699-1-V also includes a trip-free mechanical latching that ensures the CB will stay in a `closed\' position after a trip, until manual reset. This provides a high level of safety that prevents anyone from manually resetting the system while the overload or fault is still present.

Overall, the LEL11-31699-1-V circuit breaker is a robust and reliable devise designed for the protection of international AC systems. With its small size, fast operating speed, and wide range of sizes, the CB is a smart and cost-effective choice for many businesses and homeowners.

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