摘要:
A modular electrical apparatus (10; 100) is described, comprising coupling elements (17, 18; 117, 118) for coupling said apparatus (10; 100) to a further modular electrical apparatus (31) such that said apparatuses (10; 100; 31), once they are coupled together, have two respective juxtaposed side walls (12, 34). The modular electrical apparatus (10; 100) comprises a generally box-shaped apparatus body (11) including a first coupling side wall (12) and a second side wall (13) opposite said first side wall (12). The coupling elements (17, 18; 117, 118) comprise at least one elastically flexible coupling tooth (17; 117) projecting from said first side wall (12), the coupling tooth (17; 117) being suitable to selectively take a coupling configuration, wherein said tooth (17; 117) is elastically uncharged, and an uncoupling configuration, wherein said tooth is deflected and elastically charged with respect to the coupling configuration. The modular electrical apparatus (10; 100) being characterized in that it comprises holding elements (21, 22; 121, 122) suitable to releasably hold said coupling tooth (17; 117) in the uncoupling configuration.
摘要:
An operating mechanism of a moving contact (15) for an automatic electrical circuit breaker (10), of novel constructional simplicity, comprises an operating member (28), a system of levers (25) for the engagement of the moving contact (15) with the operating member (25) and for the oscillation of the moving contact (15) from an open position of the circuit breaker, separated from a fixed contact (37), to a closed position of the circuit breaker, with the moving contact (15) in electrical contact with the fixed contact (37), together with elastic means (43) which constantly press the moving contact (15) towards said open position of the circuit breaker, said system of levers (25) interacting with an electrical protection device (34) to release the operating member (28), wherein the levers of said system of levers (25) are made from flat plates.
摘要:
In an auxiliary modular device for modular circuit-breakers, the mode of operation of a switching contact of the auxiliary device can be preset from two modes of operation by means of a cam selection device operable from the front of the auxiliary device, and an indicator flag facing the front and a test button operated from the front enable the functionality of the equipment and the preset mode of operation to be checked.