Abstract:
During the opening process of an actuator (12) of a circuit breaker (10), the polarity of a DC power supply (54) for a coil (28) of the actuator (12) is reversed to achieve a deceleration effect before the armature and the stator of the actuator (12) impact on each other.
Abstract:
The invention relates to a circuit breaker (200) and at least one circuit breaker slider (100) mounted to the circuit breaker (200) for sliding the circuit breaker (200) on a sliding rail (202, 502) of a circuit breaker compartment (204). The at least one circuit breaker slider (100) comprises a base component (102) with a slot (104) for receiving a portion (208) of the circuit breaker (200) to support the circuit breaker (200). At least one attachment region (109, 111) of the at least one circuit breaker slider (100) is provided for attaching the at least one circuit breaker slider (100) to the circuit breaker (200) at at least one corresponding attachment region (209, 211) of the circuit breaker (200).
Abstract:
A magnetic actuator unit (100) for a circuit breaker, in particular for a medium voltage vacuum circuit breaker, is provided comprising a core (101 ), a coil (105), an actuating shaft (104), a first movable plate (103) and a second movable plate (107). The magnetic actuator unit (100) is adapted for switching the circuit breaker ON and OFF by moving the first movable plate (103) between an ON position and an OFF position. The magnetic actuator unit (100) further comprises a non-magnetic flat insert (110) arranged between the core (101) and the second movable plate (107), wherein the non-magnetic flat insert (110) and the second movable plate (107) are adapted for adjusting a holding force of the magnetic actuator unit (100) provided by the second movable plate (107) at the OFF position, wherein the holding force is sufficient for holding the second movable plate (107) at the OFF position against the outer forces that are acting on the magnetic actuator unit (100).
Abstract:
According to an exemplary embodiment of the invention a switchgear assembly may be provided which comprises a circuit breaker compartment, a first external interface, a second external interface, a third external interface, wherein at least one of the external interfaces comprises an actuating cylinder. Moreover, the actuating cylinder comprises a movable member, wherein the movable member comprises an elongated axis and wherein the movable member is movable in a direction of the elongated axis and wherein the movable member is adapted to connect and disconnect a conducting part of an installed circuit breaker with an external conductor.
Abstract:
The invention relates to a contact device (200) for a switching pole (100) of an electric and/or electronic application, such as a circuit breaker, with an inner terminal (211, 221, 231, 241, 251) for electrically connecting the contact device (200) to a moving contact (103) of the switching pole (100), and an outer terminal (212, 222, 232, 242, 252) for electrically connecting the contact device (200) to a terminal (105, 107) of the switching pole (100). The proposed solution offers the combination of a low electrical resistance with a high mechanical flexibility. A braided flexible structure (213, 223, 233) is provided extending in a plane for electrically connecting the inner terminal (211, 221, 231, 241, 251) with the outer terminal (212, 222, 232, 242, 252) such that the inner terminal (211, 221, 231, 241, 251) is movable relative to the outer terminal (212, 222, 232, 242, 252) and in a direction (224) traverse to the plane from an off-position (290) to an on-position (292) of the switching pole (100).
Abstract:
Magnetic actuator unit for a circuit-braker arrangement comprising an armature (6) arranged to be movable between a first and second end position for an closed and opened switching position respectively of the circuit-braker, a single electrical coil (7) for moving the armature (6) to the second position due to electrical current feed, a permanent magnet (8) for additionally loading the armature (6) in the direction of the second position, an outer ferromagnetic yoke (9) at least partly surrounding the single electrical coil (7) and the ferromagnetic core (10) for directing the magnetic flux to the movable ferromagnetic armature (6), an opening spring means for permanent loading the armature (6) in the direction of the first position, which is coaxially arranged between said armature (6) and the front side of the electrical coil (7), wherein the opening spring means are at least partly accommodated inside a groove (12) formed in the disk-shaped armature (6) whose dimension corresponds to the outer shape of the ferromagnetic yoke (9).
Abstract:
Bistable magnetic actuator (5) for a medium voltage circuit breaker arrangement, comprising at least one electrical coil (7) for switching a ferromagnetic armature (6) between a first limit position and a second limit position effected by an electromagnetic field, at least one permanent magnet (8) for holding the armature (6) in one of the two limit positions corresponding to an open and a closed electrical switching position respectively of the mechanically connected circuit breaker, wherein the armature (6) comprises an upper plunger (9) resting on a ferromagnetic core element (10) of the one electrical coil (7) for static holding the armature (6) in the first limit position, which is attached to a plunger rod (12) extending through the ferromagnetic core element (10) and through the permanent magnet (8) for mechanically coupling the actuator (5) to the circuit breaker arrangement, wherein the armature (6) comprises a lower plunger (13) unlockable attached on the opposite side of the plunger rod (12) in an axial distance from the core element (10) and movable on the core element (10) in order to shift the armature (6) to the second limit position by reducing the magnetic flux in the upper plunger (9).
Abstract:
The invention relates to a pushrod assembly (1 ) for a medium voltage vacuum circuit breaker (2), comprising a pushrod (3) with an insulating body (4), whereby an electrical conducting terminal (6) is arranged on a first abutting face (7) of the insulating body (4) and a guiding means is arranged on an opposing side of the electrical conducting terminal (6) on a second abutting face (8) of the insulating body (4) for mechanically connecting the pushrod (3) with an electromagnetic actuator (9), whereby the pushrod (3) is integrated in the electromagnetic actuator (9) and thus part of the electromagnetic actuator (9).
Abstract:
A magnetic actuator with a movable part and a non-movable part is provided. The movable part comprises two ferromagnetic elements which are arranged such that a part of the elements is close to the non-movable part in order to reduce a magnetic force for acting on the movable part an perform a switching operation of the magnetic actuator while moving the movable part towards the non-movable part. As the distance between the movable part and the non-movable part is reduced compared to actuators with parallel plates, it may be possible to reduce a current through a coil of the non- movable part for generating the magnetic force for acting on the movable part so that a switching operation is performed. In order to not reduce the working stroke of the magnetic actuator, the ferromagnetic elements of the movable part are able to rotate around a rotational axis when being attracted towards the non-movable part.
Abstract:
A magnetic actuator unit (100) for a circuit breaker arrangement (500), in particular for a medium voltage vacuum circuit breaker, is provided, comprising a coil (101 ), a core (102), and a movable plate (106). The core (102) is accommodating the coil (101 ), and has a core element (103) which is arranged between permanent magnets (122) and flanks (104, 105) of the core (102). The movable plate (106) is attracted by the core (102) due to the magnetic field of the permanent magnets (122) and the coil (101 ). The movable plate (106) is actuating the circuit breaker arrangement (500) when being attracted by the core (102). A first attachment element (110) for attaching the magnetic actuator unit (100) to a member of the circuit breaker arrangement (500) is provided, wherein the first attachment element (110) is attached to the flanks (104, 105) and not to the core element (103) of the core (102).