DK142095B - FILTER THREAT FOR HIGH ELECTRIC VOLTAGE AND GREAT POWER - Google Patents

Description

(11) PUBLICATION REFERENCE 1 ^ + 2095 / xiii in Jggf i \ Ra / DENMARK (ευ int. Ci.3 § (21) Application No. 1807/73 (22) Filed on 4th & per 1973 (24) Running day 4. Apr 1973 (44) The application submitted and the publication document published on 25 · HUg 1980 DIRECTORATE OF THE PATENT AND TRADEMARKET (3 °) Mortgage requested from the

Apr 5 1972, 2216525, DE

(71) UNION AhTIENGESELLSGRAFT TRANSFORMERS, Deckerstrasse 5, 7 Short = gart-Bad Cannstatt, DE.

(72) Inventor: Hans Linnert, Post Wintersdorf, 8501 Lind 48, DE: Walter Mueller, KappelTjergsteig 37, 8540 Schwabach, DE: Georg Weigel, Schul * Theissallee 57, 85OC Nuremberg, DE.

(74) Plenipotentiary in the proceedings:

Scandinavian Patent Bureau v. Frode Larsen._, (54) Filter choke for high electrical voltages and large effects.

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a filter throttle for high electrical voltages and large effects and with linear characteristics and with a coil mounted in a tank filled with insulating liquid, the load switch and the step selector being side by side in a flat, upwards with a cover. closed tank.

The windings of filter thrusters for large effects are usually built into tanks filled with transformer oil. In this way, the windings must be insulated on the one hand for the full test voltage to meet the earthed aunt and on the other hand the tank and other nearby metallic structural parts at a sheath of laminated transformer plate arranged between them and the windings must be shielded from the magnetic field of the winding. to keep the occurring extra losses as small as possible.

When such arrangements of the coils for throttle coils are used as filter throttles for higher harmonic fluctuations of voltage and current in relation to the grid frequency, then, as far as possible, an absolutely linear characteristic is necessary. For this reason, the sheath of laminated transformer plate must not be used magnetically until saturation. As a result of this requirement, a relatively low allowable induction is obtained for the shielding sheath, so that its manufacture requires considerable effort of material and production time as soon as a linear characteristic of the filter throttle is required.

It is known from English Patent No. 1,027,151 to place a choke coil in a porcelain housing, but such an arrangement will produce undefinable, magnetic field and flux changes dependent on the instantaneous load.

It is therefore the object of the invention to provide a filter throttle of the specified type with a linear characteristic where magnetic shielding can be avoided, thereby keeping as little as possible both the material and work required for manufacture and the overall dimensions of the filter throttle.

According to the invention, this is accomplished by a high-voltage solid insulation material placed above the cover selector on the cover comprises the magnetically unshielded winding resting on insulating rings, the inner space of which is enclosed by the tank and the high-voltage feed through a coaxial cut-out of the high-voltage feed.

The design of a filter choke according to the invention enables saving of both a magnetic shield and an electrical main insulation of the winding. In addition, a voltage control is obtained along the surface of the high voltage lead-through, which otherwise could only be achieved by a complicated and expensive feed-through, especially a capacitor feed-through.

Advantageous embodiments of the invention consist in that the flat tank is provided with an oval base and cover, and that the step selector, winding and high voltage feed-through are coaxially arranged at one end of the tank in such a way that between the winding and the The necessary wiring steps are passed through the recess in the tank cover. Thereby, outside the step selector, the load switch receiving end of the tank is arranged a step switch mechanism.

In other advantageous embodiments of the invention, the upper end of the winding is connected directly to the inside of the germwood of the high voltage feedthrough, and the lower end of the winding is designed as a step winding.

In the drawing, an embodiment of a filter throttle according to the invention is shown, fig. 1 is a sectional view of the filter choke, and FIG. 2 same from above.

In a tank 4 with oval bottom 8 and also oval cover 9, a step selector 5 and a load switch 6 are incorporated side by side. The axes of the step selector 5 and the load switch 6 are perpendicular or vertical above the bottom 8, parallel to each other and located at each end of the tank 4. Above the step selector 5, a recess is formed coaxially with the step selector 5, which is covered by a also coaxially disposed therewith, preferably made of porcelain, high voltage feed-through 2. Concentric in the high-voltage feed-through 2 and above the recess in the cover 9, there is insulated. rings 10 arranged one of disc coils constructed and tubeless winding constructed as a tube winding 1. On the high voltage lead 2, a clamping head 3 * is electrically connected to the upper end of the winding 1.

The inner shell formed by the tank 1 and the high voltage feed 2 is completely filled with transformer oil which, after heating, is sucked away through an insulating pipe 7 extending over the winding 1 and a suction line 12 from the upper part of the high voltage winding 2 and after reflux. back to the tank through a connector 11.

Next to the high-voltage feed-through 2 at the other end of the tank 4, a gas dome 13 * is placed above the load switch 6 which absorbs any gas arising from the switch and thereby prevents its entry into the winding room. On the outside of the tank 4 next to the load switch 6, there is arranged on or in the tank wall a step-switch drive mechanism 14 and a low voltage terminal 15.

The terminal head 3 is electrically outwardly connected to a high voltage position not shown and inwardly, as already explained, to the upper end of the winding 1. In the construction of the winding 1 of

Claims (3)

In the case of disc coils, the applied high voltage within the high voltage lead 2 is reduced practically linearly from above downwards. Output wires from the step winding located in the lower part of the winding 1 are routed to the relevant terminals of the step selector 5, which, depending on the setting, selectively connects two of the output contacts with corresponding terminals in the load switch 6. From the load switch discharge current it passes through the winding 1. current again discharged through the low voltage terminal 15. PATENTERA 7. 1. Filter throttle for high electrical voltages and large effects and with linear characteristics and with a coil mounted in a tank filled with insulating liquid, the load switch (6) and the step selector (5) being integrated side by side in a flat, upside down with a cover (9) closed tank (4 ·), characterized in that a high voltage feed (2) of solid insulating material concentrically placed over the step selector (5) on the cover (9) concentrically surrounds the magnetically unshielded insulating ring (10). winding (1), wherein the inner compartments (2) of the tank (4) and the high voltage feed (2) are blinded to each other through a coaxial recess in the cover (9) with the high voltage feed. Filter throttle according to claim 1, characterized in that the flat tank (4) is provided with an oval bottom (8) and a cover (9) and that the step selector (5), the winding (1) and the high voltage feed (2) are arranged thus coaxially at one end of the tank (4), that electrical wires necessary between the winding (1) and the step selector (5) are passed through the recess in the cover (9) for the tank (4). Filter choke according to claims 1 and 2, characterized in that a step-switch drive mechanism (14) is arranged outside the load selector (6), opposite the step selector (5), which receives the end of the tank (4).