PL314171A1 - Leakage current module connected to protective switches - Google Patents

Abstract

In what is known as a current-operated earth-leakage circuit breaker with overcurrent release, configured in a modular serial design, the leakage current module with its housing (1) is aligned laterally to circuit breakers and connected to them to form a compact modular unit. This involves establishing a connection between a summation current transformer of the leakage current module and terminals of the circuit breakers as well as coupling their switching and tripping mechanisms. The external electrical connection is effected at each leakage current module by means of terminals arranged within a terminal space (3.1) of the housing (1). To be able to allocate this leakage current module connection to either the upper or the lower connection level of the switch in accordance with the local conditions, the housing (1) of the leakage current module can be assembled with an interlocking fit between a multipart central body (2) and, situated on either side thereof, two side bodies (3, 4) extending over the full width of the housing. The two side bodies (3, 4) have different designs, the larger side body (3) comprising the terminal space (3.1). As needed, the two side bodies (3, 4) can be alternately joined to the central body (2) with its symmetrical housing contours (2.5) to form a finished housing (1) for all the components of the leakage current module. The leakage current module can thus be combined universally with circuit breakers to form current-operated earth-leakage circuit breakers with overcurrent relase, of varying rated current.