Modular four-pole residual current circuit breaker

Abstract

A modular four-pole residual current circuit breaker, comprising: --an enclosure, on which there are terminals for input and output connection to corresponding conductors of an electric circuit, with a front wall from which an actuation lever protrudes, a rear wall, two side walls that are substantially parallel to each other and whose distance is four times a base module M, a lower wall and an upper wall, the enclosure containing: --first, second, third and fourth magnetothermal interruption units, which are arranged mutually side by side and are separated by dividing walls, an input terminal and an output terminal being associated with the units; --a residual current protection unit, arranged at one of the lateral ends of the enclosure and laterally adjacent to the first magnetothermal interruption unit; its particularity consists of the fact that in a front view, the dividing wall between the first and second magnetothermal units is substantially step-shaped and forms a compartment for accommodating the first magnetothermal unit that has an upper part and a lower part that have mutually different widths, the lower part of the compartment being wider than the upper part and accommodating a transmission lever that is suitable to functionally couple the kinematic mechanism of the residual current unit with the kinematic mechanism of the magnetothermal units that are laterally adjacent to it.

Description

technical field [0001] The present invention relates to a modular four-pole residual current circuit breaker, and in particular to a four thermomagnetic interrupting chamber with one side laterally juxtaposed to form a single unit and a residual current protection chamber having one Current circuit breaker. Background technique [0002] It is known that the housings of so-called modular units have two mutually parallel side walls separated from each other by a prefabricated base for all modular units of the same type, made of suitable standards. [0003] These modular devices are used as support guides by means of suitably shaped areas provided on the walls for fixing the housing and are placed side by side to make the best use of the occupied space. [0004] In a modular multi-pole residual current circuit breaker, the thermal-magnetic interruption chambers are usually arranged parallel to each other and have the same width equal to one basic unit. [0005] According to t...

AI Technical Summary

Problems solved by technology

[0011] The detailed embodiment does not allow the installation of all thermo-magnetic circuit breakers in the absence of a residual current protection chamber, so testing of the entire thermo-magnetic section cannot be done without a residual current protection chamber

[0012] Correspondingly, in the case of poor operation of the thermal-magnetic part, the residual current part of the installation is also unusable, thus wasting raw materials, increasing production time and cost

[0013] Further, the need for pre-installed circuit breakers makes it necessary to produce and store circuit breakers of different models and performances regardless of actual market demand and the attendant storage risk of unnecessary storage devices

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