Abstract:
A pushrod assembly 10 for a circuit breaker comprises a pushrod 12 with an insulating body 16, an insulating housing 14 surrounding the push rod 12, a first insulating shield 32 connected to the pushrod 12 and a second insulating shield 34 connected to the housing 14. The first insulating shield 32 and the second insulating shield 34 are arranged inside the housing 14 such that an electrical path through a fluid 26 inside the housing 14 is longer than the distance of a first end 18 and a second end 22 of the push rod 12.
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:
A magnetic actuator 10 for a circuit breaker arrangement comprises position lockers 34a, 34b for locking a coil 14 in grooves 26a, 26b of the core 12 of the magnetic actuator 10.The position lockers 34a, 34b have a locking part 38 protruding away from the core 12 and over the coil 14 remote from the grooves 26a, 26b.
Abstract:
During the opening operation of an actuator 12 of a circuit breaker 10, the kinetic energy of the movement of the actuator 12 is absorbed by a damper element 54, 55.
Abstract:
Medium voltage circuit breaker arrangement comprising al least one pole part housing (1a -1c) for accommodating a pair of coaxially arranged electrical contacts (9a,9b), wherein - one electrical contact (9b) of the pair of electrical contacts (9a,9b) is axially movable via a jackshaft arrangement (10) which is accommodated in a recasted sheet metal housing (4), and driven by an actuator unit (2), wherein - the sheet metal housing (4) is only designed to form a suspension construction for the at least one pole part housing (1a - 1c) and the jackshaft arrangement (10) and the corresponding actuator unit (2) forming a module, wherein - an additional housing part (11; 13; 15) is provided for covering at least the actuator unit (2) of the module in order to define the outer geometrical dimensions of the circuit breaker arrangement.
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:
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).
Abstract:
The invention relates to a circuit-breaker for switching medium-voltage to high-voltage circuits, comprising a pole part (1) having a cup-shaped housing (4) made of insulating material for accommodating an interrupter insert (3) operated by a drive rod (12), wherein the cup-shaped housing () is divided in an upper housing part (5) in which the interrupter insert (3) is arranged and a lower housing part (6) for accommodating a magnetic actuator (2), wherein the drive rod (12) of the interrupter insert (3) is coaxially arranged to an armature (13) of the magnetic actuator (2).