THERMAL OVERCURRENT CIRCUIT BREAKER

摘要

A thermal overcurrent circuit breaker having a switch housing in which a thermal expansion element and a snap-action switching mechanism, which is coupled to the thermal expansion element and can be manually operated, and also a moving contact, which interacts with the snap-action switching mechanism, and a fixed contact are arranged, the fixed contact being connected to a first connection rail while contact is made with the moving contact by a second connection rail by means of the thermal expansion element. The switch housing has a number of connection chambers in which in each case one of the connection rails is arranged, wherein a two-limb spring element for making clamping contact with a connection line, which is guided into the connection chamber via a first housing opening and has the connection rail, is arranged in each connection chamber.

主权项

1. A thermal overcurrent circuit breaker comprising:
a switch housing in which a manually operated snap-action switching mechanism and a thermal expansion element cooperating therewith, in particular a bimetal, and a moving contact cooperating with the snap-action switching mechanism and a fixed contact are arranged, which is connected to a first connection rail, while the moving contact is contacted via the thermal expansion element with a second connection rail; and a housing main body arranged in the switch housing, the housing main body having a plurality of connection chambers and a contact chamber positioned between these and an operating side in which the snap-action switching mechanism is arranged together with the thermal expansion element, wherein, in each connection chamber, one of the connection rails and a two-limbed spring element for clamp contacting a connection line guided via a first housing opening into the connection chamber is arranged with the connection rail with a first spring limb and a second spring limb, and wherein a second housing opening substantially parallel to the first housing opening and covered by the second spring limb in its contact position opens into the respective connection chamber for pivotal actuation of the second spring limb.