Patent application number | Description | Published |
20120168291 | CIRCUIT BREAKER ARRANGEMENT FOR MEDIUM VOLTAGE TO HIGH VOLTAGE APPLICATIONS - Exemplary embodiments are directed to a circuit breaker arrangement for medium voltage to high voltage applications. The circuit breaker includes at least one pole part housing for accommodating a vacuum insert, within which a pair of corresponding electrical contacts is coaxially arranged. A fixed electrical contact is electrically connected to an upper terminal of the pole part housing and an axial movable electrical contact is electrically connected to a lower terminal of the pole part housing and is operated by an insulating pushrod. The insulating pushrod extends through a shielding plate arranged on a lower opening of the pole part housing. The shielding plate includes a rigid moulded plastic insulating material. At least one sealing ring has an elastic material moulded on the periphery of the shielding plate. | 07-05-2012 |
20120268223 | MAGNETIC ACTUATOR UNIT FOR A CIRCUIT-BREAKER ARRANGEMENT - A magnetic actuator unit is disclosed for a circuit-breaker arrangement, having an armature arranged to be movable between first and second, closed and opened end switching positions of the circuit-breaker, a single electrical coil for moving the armature to the second position due to electrical current feed, a permanent magnet for loading the armature in the direction of the second position, an outer ferromagnetic yoke at least partly surrounding the single electrical coil and the ferromagnetic core for directing magnetic flux to the armature, and an opening spring for permanent loading of the armature in the direction of the first position, which is coaxially arranged between the armature and the front side of the electrical coil. The opening spring can be at least partly accommodated inside an armature groove. | 10-25-2012 |
20120274428 | CIRCUIT-BREAKER WITH A COMMON HOUSING - A circuit-breaker is provided for switching medium-voltage to high-voltage circuits. The circuit breaker includes a pole part having a cup-shaped housing made of insulating material for accommodating an interrupter insert operated by a drive rod. The cup-shaped housing is divided into an upper housing part in which the interrupter insert is arranged, and a lower housing part for accommodating a magnetic actuator. The drive rod of the interrupter insert is coaxially arranged to an armature of the magnetic actuator. | 11-01-2012 |
20120286905 | BISTABLE MAGNETIC ACTUATOR FOR A MEDIUM VOLTAGE CIRCUIT BREAKER - Exemplary embodiments are directed to a bistable magnetic actuator for a medium voltage circuit breaker arrangement, including at least one electrical coil for switching a ferromagnetic armature between a first limit position and a second limit position effected by an electromagnetic field, at least one permanent magnet for holding the armature in one of the two limit positions corresponding to an open and a closed electrical switching position respectively of the mechanically connected circuit breaker. The armature includes an upper plunger resting on a ferromagnetic core element of the one electrical coil for static holding the armature in the first limit position, which is attached to a plunger rod extending through the ferromagnetic core element and through the permanent magnet for mechanically coupling the actuator to the circuit breaker arrangement. | 11-15-2012 |
20120292163 | MEDIUM VOLTAGE CIRCUIT BREAKER ARRANGEMENT - Exemplary embodiments are directed to a medium voltage circuit breaker arrangement that includes at least one pole part housing for accommodating a pair of coaxially arranged electrical contacts, wherein one electrical contact of the pair of electrical contacts is axially movable via a jackshaft arrangement which is accommodated in a recasted sheet metal housing, and driven by an actuator unit. The sheet metal housing forms a suspension construction for the at least one pole part housing and the jackshaft arrangement and the corresponding actuator unit forming a module. An additional housing part is provided for covering at least the actuator unit of the module in order to define the outer geometrical dimensions of the circuit breaker arrangement. | 11-22-2012 |
20130026016 | PUSHROD ASSEMBLY FOR CIRCUIT BREAKER - A pushrod assembly for a circuit breaker having a pushrod with an insulating body, an insulating housing surrounding the push rod, a first insulating shield connected to the pushrod and a second insulating shield connected to the housing. The first insulating shield and the second insulating shield are arranged inside the housing such that an electrical path through a fluid inside the housing is longer than the distance of a first end and a second end of the push rod. | 01-31-2013 |
20130146433 | ELECTRICAL CONTACT ARRANGEMENT AND AIR INSULATED MEDIUM VOLTAGE CIRCUIT BREAKER INCLUDING THE ELECTRICAL CONTACT ARRANGEMENT - An electrical contact arrangement for medium to high voltage applications includes a contact arm having a distal end section on which a circular shaped annulus arrangement having several axially and parallel directed contact fingers is arranged. The contact fingers are pressed on the contact arm via respective radially directed connection sections by a spring ring which is peripherally arranged around the contact fingers. The distal end section of the contact arm includes a first ring-shaped surface and an adjacent second ring-shaped surface, so that the connection section of each contact finger is pressed to at least both the first and second ring-shaped surfaces. | 06-13-2013 |
20130153377 | MEDIUM VOLTAGE CIRCUIT BREAKER ARRANGEMENT OPERATED BY A TRANSMISSION MECHANISM - A circuit breaker arrangement includes at least one pole part for switching an electrical medium to high voltage circuit by a respective pair of fixed and movable electrical contacts. A pushrod of a respective movable electrical contact is operated by a common actuator unit, which is mechanically connected to each pushrod via a transmission mechanism for transferring a switching force from the actuator unit to each pushrod. The transmission mechanism includes a crankshaft having at least one crank which is pivotally attached to one end of a connection rod. An opposite end of the connection rod is pivotally attached to an end of the pushrod of a corresponding pole part. | 06-20-2013 |
20130187734 | MAGNETIC ACTUATOR FOR A CIRCUIT BREAKER ARRANGEMENT - An exemplary magnetic actuator for a circuit breaker arrangement includes a coil, a core with a groove for accommodating a section of the coil, and a movable plate configured to be attracted by the core. When a magnetic field is generated by the coil, the movable plate actuates the circuit breaker arrangement based on the attraction to the core. The magnetic actuator also includes a position locker for locking the coil in the groove. The position locker having a locking part protruding away from the core and over a section of the coil not accommodated in the groove. | 07-25-2013 |
20130207751 | MAGNETIC ACTUATOR WITH TWO-PIECE SIDE PLATES FOR A CIRCUIT BREAKER - A magnetic actuator unit is provided for a circuit breaker arrangement, such as a medium voltage vacuum circuit breaker. The magnetic actuator unit includes a coil, a core, and a movable plate. The core accommodates the coil, and has a core element which is arranged between permanent magnets and flanks of the core. The movable plate is attracted by the core due to the magnetic field of the permanent magnets and the coil. The movable plate is actuating the circuit breaker arrangement when it is attracted by the core. The magnetic actuator unit includes a first attachment element for attaching the magnetic actuator unit to a member of the circuit breaker arrangement. The first attachment element is attached to the flanks and not to the core element of the core. | 08-15-2013 |
20130207752 | MAGNETIC ACTUATOR WITH A NON-MAGNETIC INSERT - A magnetic actuator unit is provided for a circuit breaker, such as a medium voltage vacuum circuit breaker. The magnetic actuator unit includes a core, a coil, an actuating shaft, a first movable plate, a second movable plate, and a non-magnetic flat insert arranged between the core and the second movable plate. The magnetic actuator unit configured to switch the circuit breaker ON and OFF by moving the first movable plate between an ON position and an OFF position. The non-magnetic flat insert and the second movable plate are configured to adjust a holding force of the magnetic actuator unit provided by the second movable plate at the OFF position. The holding force is sufficient for holding the second movable plate at the OFF position against outer forces that are acting on the magnetic actuator unit. | 08-15-2013 |
20140139964 | METHOD FOR DRIVING AN ACTUATOR OF A CIRCUIT BREAKER, AND ACTUATOR FOR A CIRCUIT BREAKER - A method and system for driving an actuator of a circuit breaker are disclosed. The method includes supplying a coil of the actuator with a first voltage, wherein the coil can generate a magnetic field, which can cause an armature to move relative to a stator of the actuator from a closed position to an opened position. A second voltage of reverse polarity can be supplied to the coil with respect to the first voltage while the armature is moving relative to the stator, such that the coil can generate a reverse magnetic field, which decelerates the relative movement of the stator and the armature. | 05-22-2014 |
20140145801 | MAGNETIC ACTUATOR WITH ROTATABLE ARMATURE - A magnetic actuator with a movable part and a non-movable part is disclosed. The movable part can include two rotatable ferromagnetic elements with a portion close to the non-movable part to reduce magnetic force acting on the movable part during a switching operation, while moving the movable part towards the non-movable part. As the distance between the movable part and the non-movable part is reduced, a current through a coil of the non-movable part for generating magnetic force for acting on the movable part during a switching operation. | 05-29-2014 |