Abstract:
The invention relates to a cover metal-sheet for the use in medium and high voltage switchgears, by which the metal sheet is applied with openings for inserting srewed connections, and a method of making the same, according to the preamble of claim 1 and 5. In order to integrate shaped spring elements with defined force/deformation characteristics in sheet parts in order to reduce needed parts, and save time of manufacturing, the openings are deformed in the direction antipodal and/or in the same direction to the screwing direction and that the area around the opening is treated by hardening and tempering in that way, that the implemented deformed and hardened area around the opening is an integrated spring element.
Abstract:
The invention relates to a pole part for medium voltage use, with an insulating coverage made of duroplastic or thermoplastic material, and method for manufacture the same, according to the preamble of Claims 1 and 4. In order to enhance the manufacture of pole parts, in that way, that the ready pole part could be easier released out of the mould, and additionally that the inferface between elements made of different materials are tightly closed, in order to generate reproducable dielectric withstand Performance in the manufacture, the transition area between different elements of the pole part are commonly flat in such a way, that rounded edges and/or steps are avoided.
Abstract:
The invention relates to a shielding element for the use in medium voltage switchgears with vacuum interrupters with at least two contacts, which are movable along a switching path between closed and open contact position, wherein the shielding element is positioned around the contact position region in the vacuum interrupter, wherein at least the inner surface of the shielding is applied with a topographic structure which is a rough or a structured surface, according to claim 1. In order to enhance the energy absorbance behavior of the at least the shielding, the implemented topographic structure is formed in such a way, that by given constant or approximately constant volume (Vi) of the shielding body, the surface ratio of the treated surface (S2) with implemented surface structure, and a untreated surface (S1) without topographic structure is greater than 1, so that this follows the condition V1 ~ V2 and S2/S1 >1.
Abstract:
The invention relates to an embedded pole part and method of manufacture the same, with vacuum interrupter which is embedded or assembled in an expoxy resin or thermoplastic housing, with a fixed contact and a movable contact, wherein the fixed contact is electrically and mechanically fixed to an upper electrical terminal, according to the preamble of claim 1 and 8. In order to damp and/or reduce this bouncing at the upper terminal or at the terminal concerning to the fixed contact of the pole part, the upper terminal or the terminal according to the fixed contact is covered by a damping layer between the terminal surface and the embedding or surrounding housing.
Abstract:
The present invention relates to a process for preparing a coated push -rod and/or pole housing made of a thermoplastic material or bulk moulding compound (BMC) for electrical contacts or connecting elements, to such a coated push-rod and/or pole housing and to the use of the process for preparing coated push -rods and/or pole housings. High mechanical and dimensional stability under outdoor conditions is provided. The process comprises steps of forming a sol from hydrolytic or non-hydrolytic sol/gel forming components, and applying the sol onto the surface of the push -rod or pole housing. The coating of the pole housing or push-rod is used for a UV protection layer.
Abstract:
Interrupter insert for a circuit breaker arrangement comprising a cylindrically shaped insulating part (1), within which a pair of corresponding electrical contact pieces (3a, 3b) are coaxially arranged and are concentrically surrounded by a shield (6) between the contact pieces (3a, 3b) at one side and an inner wall (7) of the insulating part (1) at the other side, wherein on both front ends of the shield (6) an annular gap (8a, 8b) to the inner wall (7) is provided, wherein each annular gap (8a; 8b) is at least partly filled with a brazing material (9) in order to permanently attach the shield (6) on both front ends to the inner wall (7) of the insulating part (1) by brazing to an inner oriented metallization or by direct active brazing to the ceramic body.
Abstract:
A vacuum interrupter for a circuit breaker arrangement comprising a cylindrically shaped insulating part (1 ), within which a pair of electrical contact parts (2a, 2b) are coaxially arranged and concentrical surrounded by the insulating part (1 ), wherein the electrical contact parts (2a, 2b) comprise means for initiating a disconnection arc only between corresponding inner contact elements (8a, 8b) after starting a disconnection process, and corresponding outer contact elements (9a, 9b) comprise means for commutate said arc from the inner contact elements (8a, 8b) to the outer contact elements (9a, 9b) until the disconnection process is completed, wherein each inner electrical contact element (8a;8b) is designed as a TMF-like contact element for generating mainly a transverse magnetic field, and each outer electrical contact element (9a;9b) is designed as an AMF-like contact element for generating mainly an axial magnetic field.
Abstract:
Circuit breaker arrangement comprising at least one pole part (3a - 3c) for switching an electrical medium to high voltage circuit by a respective pair of corresponding inner electrical contacts (4a, 4b), wherein a pushrod (5a - 5c) of a respective movable electrical contact (4a) is operated by a common actuator unit (6), which is mechanically connected to each pushrod (5a - 5c) via transmission means for transferring the switching force from the actuator unit (6) to each pushrod (5a - 5c), wherein the transmission means comprise a crankshaft (7) having at least one crank (8a - 8c) which is pivotally attached to one end of a connection rod (9a - 9c), wherein further the opposite end of the connection rod (9a - 9c) is pivotally attached to the end of the pushrod (5a - 5c) of the corresponding pole part (3a - 3c).
Abstract:
The invention relates to an electrical contact arrangement for medium to high voltage applications comprising a contact arm (1) having a distal end section (2) on which a circular shaped annulus arrangement consisting of several axially and parallel directed contact fingers (3) is arranged, which are pressed on the contact arm (1) via respective radially directed connection sections (4) by a spring ring (5) which is peripherally arranged around the contact fingers (3), wherein the distal end section (2) of the contact arm (1) comprises a first ring-shaped surface (6b) and an adjacent second ring- shaped surface (6a), so that the connection section (4) of each contact finger (3) is pressed to at least both ring-shaped surfaces (6a, 6b).
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 (4) 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).