Abstract:
A magnetic trip device of a thermal magnetic circuit breaker and a thermal magnetic circuit breaker including such a magnetic trip device, and also a method for adjusting a magnetic field area of a magnetic trip device of a thermal magnetic circuit breaker, are disclosed. In at least one embodiment, the magnetic trip device includes at least an armature locator moveable arranged at a pin in order to adjust a magnetic field area, and an armature element fixed on a lower surface of the armature locator in order to interact with a yoke, arranged near a current conductive element for conducting electric energy. The armature locator includes an adjustment element arranged between a spring element and the yoke. The spring element surrounding at least a part of the pin is arranged between the armature element and the yoke.
Abstract:
A circuit breaker including a trip unit having an internal support and a friction adjustment control system for knob control is provided. The internal support includes a first opening to receive a first rotary knob having one or more first smooth rings and a second opening to receive a second rotary knob having one or more second smooth rings. The trip unit includes a first knob control of the first rotary knob. The first knob control includes a first structural support, a first housing and a first spring installed in the first housing against the first structural support. The trip unit further includes a second knob control of the second rotary knob. The second knob control includes a second structural support, a second housing and a second spring installed in the second housing against the second structural support.
Abstract:
A circuit breaker having a positive-off stop feature includes an operating lever rotatably coupled to a side frame, a tension lever coupled to the side frame, and an upper toggle linkage and a stop link each rotatably coupled to the tension lever. The upper toggle linkage may be configured to rotate the stop link. The operating lever may be configured to move rotatably to and from an ON position and an OFF position provided the main contacts of the circuit breaker are not welded or otherwise stuck together. Should the main contacts become welded or otherwise stuck together, the upper toggle linkage may be configured to rotate the stop link to a position wherein the stop link may be configured to prevent the operating lever from moving into the OFF position. Methods of assembling a circuit breaker positive-off stop feature are also provided, as are other aspects.
Abstract:
A heater-bimetal apparatus is disclosed. The heater-bimetal apparatus has a heating element having a first portion and a second portion, a bimetal element coupled to the heating element at a third portion between the first and second portions, and a support member coupled to the heating element at the third portion, the support member including registration surfaces adapted to be received in pockets formed in spaced portions of circuit breaker housing. Assemblies including the heater-bimetal apparatus and methods of assembly of heater-bimetal assemblies are provided, as are other aspects.
Abstract:
A short circuit indicating alarm module (SCIAM). The SCIAM includes a housing, a latch pivotally mounted relative the housing, the latch including a latching member configured to be contacted by a catch of a trip bar, and a plunger translatable relative to the housing and configured, upon depressing, to contact and trip the trip bar. Modular assemblies of a circuit breaker, trip indicating assemblies, and methods of testing short circuit indicating alarm modules are provided, as are other aspects.
Abstract:
An off-stop mechanism for a circuit breaker. Off-stop mechanism includes a handle moveable to an OFF configuration, the handle including a blocking engagement portion, a blocking member pivotally coupled at a pivot location, a linkage coupled between a cross bar housing and a linkage attachment location of the blocking member, the linkage being configured to: position the blocking member in an unblocked orientation when the main contacts are not fused together, and in a blocked orientation when the main contacts are fused together, wherein blocking member in the blocked orientation engages the blocking engagement portion as the operating handle is moved to the OFF configuration wherein the engagement places the blocking member in compression between the pivot location and the blocking contact portion. Circuit breakers including the off-stop mechanism and methods of operating a circuit breaker are also provided, as are other aspects.
Abstract:
A short circuit indicating alarm module (SCIAM). The SCIAM includes a housing, a latch pivotally mounted relative the housing, the latch including a latching member configured to be contacted by a catch of a trip bar, and a plunger translatable relative to the housing and configured, upon depressing, to contact and trip the trip bar. Modular assemblies of a circuit breaker, trip indicating assemblies, and methods of testing short circuit indicating alarm modules are provided, as are other aspects.
Abstract:
A magnetic trip device of a thermal magnetic circuit breaker, a thermal magnetic circuit breaker that includes such a magnetic trip device, and a method for adjusting a magnetic field area of a magnetic trip device of a thermal magnetic circuit breaker, are disclosed. In an embodiment, the magnetic trip device includes at least an armature locator moveable arranged on a pin in order to adjust a magnetic field area, and an armature element fixed on a lower surface of the armature locator in order to interact with a yoke. The armature locator includes a stabilizer element in order to increase a contact area between the pin and the armature locator and/or a recess in order to receive at least an upper end of a spring element in order to space the armature element and the yoke from each other at least partially.