Abstract:
An arrangement is disclosed for, in particular, activating a transport pawl including a movable activation device which is secured to a carrying structure and, in a first activation phase, can be moved out of the position of rest into an end position, counter to the force of a restoring spring, and in a second activation phase can be moved out of the end position and back into the position of rest, under the force of the restoring spring. In order to configure the arrangement in such a way that the operator of the activation device is alerted to incompletely executed activation of the activation device, in at least one embodiment a locking mechanism is provided which locks the activation device in the direction of its position of rest during the first activation phase when a first intermediate position is reached, and releases it again when a second intermediate position is reached. The arrangement can be applied in particular in tensioning devices for spring energy stores of electric switches which have a tensioning shaft and a manual drive for turning the tensioning shaft.
Abstract:
A switching mechanism for a switching device is disclosed. In at least one embodiment, the switching mechanism includes a contact element which is mounted in a switching shaft segment such that it can rotate and can be switched off automatically in the event of a fault via said switching mechanism, a switching lever for switching the contact element on and off manually; a cocking lever which is mounted in a fixed position such that it can rotate and interacts with a catch; and a toggle lever joint including a coupling lug for connection to the contact element, a pivoting lever and a toggle lever joint shaft. The switching lever can assume at least one switched-on position, a manual switched-off position or automatically unlatched tripped position, or an intermediate switch position which is located between the switched-on position and the tripped position when a contact element is welded. According to at least one embodiment of the invention, the switching link of the switching lever has at least one blocking element, which interacts with the coupling lug such that the switching lever remains in the intermediate switch position if an opening operation is carried out when a contact element is welded.
Abstract:
A hinge construction is for connecting two components. The hinge construction includes a first securing part which can be fixed on a first of the two components, a second securing part which can be fixed on the second component, and a hinge part. The hinge construction further includes a first coupling device for the rotatable coupling of the first securing part to the hinge part, and a second coupling device for the pivotable coupling of the hinge part to the second securing part. The second coupling device, in order to set a distance between the two components, includes two corresponding, curved coupling surfaces, which run parallel to the pivot axis and of which a first is provided on the hinge part and the second is provided on the second securing part.
Abstract:
A power breaker includes a switching contact arrangement having a current loop in order to allow a force dependent on the current to act on the contact members. For this purpose, sections, which are arranged parallel to one another and such that they are arched and concentric, are arranged on a stationary current conductor and on a contact lever. Depending on the position of a center of a resultant force, originating from the arched sections, in relation to a pivot bearing of the contact lever, a torque acts on the contact lever causing the switching contact arrangement to open or close. Using largely identical parts, power breakers which have a current-limiting or contact-force-increasing action can thus be produced.
Abstract:
A drive train is for a displaceable contact on a breaker contact arrangement in an electrical power breaker. A coupling element displaceable against a stop and arranged between the moveable contact and corresponding drive element is provided with an anti-bounce device, including a catch element and a counter piece. The catch element which may be swung into a catch position as a result of the inertia exerted on the centre of gravity thereof, when the coupling element strikes the stop, includes a working surface extending in the pivoting direction to forma momentary working connection with the counter piece. A retaining spring is additionally provided on the catch element to guarantee that a rebounding of the coupling element into the position corresponding to the close state of the breaker contact arrangement does not occur.
Abstract:
A device is for controlling the closing of a power circuit breaker according to operational parameters. The device includes an indication element for indicating the readiness for closing and a coupling element which interacts with the indication element. The operational parameters, for example, energy store empty or switchgear cell door open cause the indication element to pivot into the position not ready for closing and cause the coupling element to move into its disabled position. The indication element for indicating the readiness for closing and additional indication elements, which represent the position of the switching contacts and the state of the energy store, are adjacently arranged in an axial manner such that they can pivot and are provided with interacting drives in order to effect a forced drive of the indication element for indicating the readiness for closing when the position of the switching contacts or the state of the energy store does not enable or permit a closing of the power circuit breaker.
Abstract:
An operating shaft (1) for operation of switching contacts in a multipole electrical power breaker has a shaft tube (2), which is intended to provide a rotating bearing, and levers (4) which project from it and are composed of dye-cast metal. These levers (4) are mounted on the shaft tube (2), which is formed from a tubular semi-finished product composed of a metal which has a higher melting point than that of the levers (4). All the levers on an operating shaft (1) can be formed as an integral dye-cast body (3) or as individual dye-cast bodies. The described configuration allows operating shafts (1) for power breakers of different sizes to be manufactured integrally.
Abstract:
A switching device has a closing device and a traversing mechanism for insertion and retraction relative to an insertion frame, where the said devices can be operated only in the OFF state of the switching device. A blocking bar having a cam element that cooperates with a carrier of an OFF operator is guided by elongated holes behind an operator's console of the switching device. The carrier and the cam element work together in such a way that the OFF operator can be pulled inward when the blocking bar is operated, thus signaling to the user that the switching device is locked in the OFF state.
Abstract:
A device for mutually locking the actuation of at least two power switches. The device includes an energy accumulator, such as a spring, assigned to each of the power switches and loaded by the rotation of a switching shaft, to thereby actuate a flexible transmission leading to an evaluation apparatus which can prevent actuation of one of the switches. The energy accumulator improves the reliability of the mechanical locking mechanism and allows a lighter transmission to be used. Plural switches may be locked or activated by connecting two flexible transmissions to a single switching shaft and to two different evaluation apparatuses.
Abstract:
A locking device is fitted in a drive device of a power switch to prevent the switch shaft from rebounding from its off position. The locking device (6) comprises a retainer (7) on the switch shaft (1) and a clamp (10) pivotable about a fixed bearing. The clamp (10) has an arc-shaped aperture to engage with the retainer (7) with considerable overlaps. The clamp (10) is actuated by a working surface on the retainer (7) so that its aperture (17) engages over the retainer (7).