摘要:
A compact power circuit breaker (1) has a molded insulative casing (3) providing the structural support and electrical isolation for the pole mechanisms (11) mounted in cavities (9) in the casing and the operating mechanism (33) mounted to the front of the casing. A grounded barrier (17) between the pole mechanisms (11) and the operating mechanism (33) protects the operator actuating push bottons controlling the operating mechanism and accessible through a molded insulative cover. Preferably, the grounded barrier (17) is sandwiched between a rear section (5) of the molded casing containing the pole cavities and a forward section (7) to which the operating mechanism is secured. The grounded barrier (17) is connected to an electrically conductive pan (61) extending under the molded insulative casing which also houses electrically grounded linkages coupling the operating mechanism to the vacuum interrupters of the pole mechanisms. A vented air gap (65) between the rear section (5) of the molded insulative casing and the grounded barrier (17) minimizes erosion of the molded insulative casing in the event of an arc penetrating the casings to the grounded barrier.
摘要:
A third electrode (8A) is soldered, via a support fitting (9) onto the inner surface of a support part (1a) which projects into the intermediate part of the inner surface of an insulation tube (1A). An arc generated between the fixed-side contact (5A) and the movable-side contact (5B) when the switch is opened is led from the outer periphery of the fixed-side contact (5A) via the third electrode (8A) to the movable-side contact (5B), in a so-called two-point switch, and the dielectric breakdown probability is thus reduced, particularly at low voltages. The third electrode may have its outer periphery exposed from the insulation tube and be used as one electrode when conditioning is carried out. By the use of this structure, the present invention is capable of meeting the demands for environmental protection and insulation reliability.
摘要:
The invention relates to switchgear with switching devices that can be controlled by magnetic drive devices, especially vacuum circuit breakers, wherein the switching devices are arranged by blocks in a housing in correspondence with the number of phases to be switched, said housing enclosing the switching devices on three sides and said devices being releasably fixed by screws in the housing by a top and a bottom contact connection piece. The switching devices (VS) have separate housings that are formed by pole shells (PS) arranged as a mirror image of each other and the top and bottom contact connecting piece (KAo, KAu) form a top and a bottom cooling body (KKo, KKu) which are releasably fixed between separately arranged vacuum circuit breaker fixing webs (VB...) of the pole shells (PS), wherein the top cooling body (KKo) is fitted in the peripheral area of the switching devices (VS) with ventilation slots (LS...) extending centrally in relation to the switching devices and the bottom cooling body (KKu) is fitted in the peripheral area of the switching devices (VS) with air inlets (LE ) arranged symmetrically in relation to the central axis. Said switchgear are used in power supply and distribution.
摘要:
In order to be able to solder all the housing parts of a vacuum interrupter for low-voltage contactors, including the tubular screening, in a single operation, the invention calls for the metal cap (9) which surrounds the two contacts (1, 2) and is made of silver-plated copper to have a shaped pattern (10, 11) running round the rim (19) which is to be soldered to one end of the hollow cylindrical insulator (12). The tubular screening (16) has a flange-like rim (17) running round its circumference with, disposed at intervals round the rim, spacer knobs (20) by means of which the screening rests on the same end of the insulator (12).
摘要:
In the process of fixing a metal screen in the housing of a vacuum switch, the screen is plastically deformed radially outwards over an internal supporting edge in the housing. The plastic deformation of the screen is carried out at an edge thereof, in such a way that an outward flanged edge is formed. Thus, the screen is retained on the supporting edge by that flanged edge and a part of the housing with a relatively large diameter. Therefore, the screen has a part with a relatively small diameter which is essentially equal to the internal diameter of the supporting edge of the housing.
摘要:
A method of manufacturing an air-tight ceramic container is disclosed. This method includes the steps of coating an active metal consisting of Ti and/or Zr on an opening end face of a ceramic tubular member (1) in an amount of 0.1 to 10 mg/cm², thereby forming an active metal layer, placing a brazing filler metal on the active metal layer, placing a metal cover member (2) for shielding an opening portion of the ceramic tubular member (1) so that a peripheral portion end face of the metal cover member (1) is in contact with the brazing filler metal, and melting the brazing filler metal by heating, thereby brazing the metal cover member to the opening end face of the ceramic tubular member (1).
摘要翻译:公开了一种制造气密陶瓷容器的方法。 该方法包括以0.1至10mg / cm 2的量在陶瓷管状构件(1)的开口端面上涂覆由Ti和/或Zr组成的活性金属的步骤,从而形成活性金属层 ,在活性金属层上放置钎料,放置金属盖构件(2),用于遮蔽陶瓷管构件(1)的开口部分,使得金属盖构件(1)的周边端面处于 与钎料接触,通过加热熔化钎料,从而将金属盖构件钎焊到陶瓷管构件(1)的开口端面。
摘要:
A vacuum interrupter, an envelope of which includes a pair of electrical lead rods of copper or copper-based alloy, one lead rod being brazed vacuum-tightto one end plate via a first tubular sealing member fitted onto one rod, and a bellows surrounding another lead rod, an outer end of the bellows being joined vacuum-tight to another end plate and an inner end of the bellows being brazed vacuum-tight to the other lead rod via a second tubular sealing memberfitted onto the other lead rod. Each sealing member is made of an iron-based alloy and has an inner wall inciuding a groove retaining solid brazing metal and two vacuum-tight brazing surfaces opposing each rod across a small clearance. The molten brazing metal permetates through the clearance due to wetability and capillary action without erodingly diffusing into the opposing surfaces of the lead rods and the first and second sealing members.