DE382798C - High voltage capacitor - Google Patents

Description

High voltage capacitor. The for the purpose of surge protection for the construction of electrical oscillating circuits etc. previously used high-voltage capacitors have various shortcomings, one of which is insufficient electrical strength both with respect to the breakdown of the capacitor located between assignments Dielectric as well as with respect to the flashover on the leads.

According to the invention, these disadvantages are avoided in that the high chip voltage capacitor that on the terminals of the capacitor lying potential gradient divided into a number of partial gradients and four capacitors consisting of a number of partial capacitors that are stacked one on top of the other and thus connected in series is built in the insulating housing. This is done on the one hand with regard to the breakdown of the dielectric achieves a much greater security, since each partial capacitor, capacitor withstands a multiple of the partial gradient allotted to it, and on the other side the sufficient creep length, which is decisive for the external rollover, is created the outer surfaces of the partial capacitor insulating housings stacked on top of one another in large numbers.

The series connection full of capacitance elements is known per se and has many practical applications. The known versions use but either the series connection of independent elements, each of which is against Isolate earth for the voltage that increases with the number of elements, or but a common insulating plate as a dielectric for several of the series-connected Capacitor elements. In the first case, a significant effort is made on isolators Insulation of the elements connected in series from earth is required, and in the second limit the possible dimensions and the generally available Space can be used for higher voltages and must also contain the insulating plate at least at the end that is under high potential also with corresponding Insulators isolated from earth «-earth.

In contrast, capacitors of any type are used in the invention used, with the only restriction that the connections are on two opposite sides Areas of the capacitor forming block l; e find, such that by a Laying them on top of one another creates a staggered increasing potential distribution disfigured. Since every capacitor naturally also forms an insulator at the same time, where is the difference between a capacitor and a common isolator of any design, but not merely through the quantitative predominance of the capacity, but mainly through the special measures peculiar to the former and facilities for the greatest possible increase in the same are clearly marked, so in the case of the present design of the capacitor, each partial capacitor forms the Insulator of the subsequent partial capacitor, such that a further insulation is quite dispensable against earth.

The same insulation principle applies to the known chain insulators Use; but this fact did not have any effect on the existing coil condenser, since the isolator links used in the chain isolator do not have any Capacitors in the technical sense are not just because their capacitance is negligible is small, but mainly because no measures are taken on it which is the production of a substantial or which the enlargement of the existing one aims at a small capacity or somehow exploits it.

The high voltage capacitors of the previous type, which in general Are built into a hasten, require an entry insulator, through «-elche the high-voltage connection is made. Deingegenül> he is with the described Capacitor by subdividing it into individual partial capacitors embedded in the insulating housing, which are connected in series by building one on top of the other, one for the whole capacitor -solitary housing dispensable and therefore also the entry insulator falls into the same thing. This advantage of the type described is particularly important high and very high voltages are taken into account.

The insulating housing of the partial insulators is considered weatherproof Made of material and provided with a rain cover, the condenser can do without special 'wrapping and eliminating the expensive for installation in the open air Entry insulator can easily be set up outdoors.

The metal connection pieces of the partial capacitors can be massive be carried out that they are lost in the capacitor by dielectric Hvsteresisv Able to give off any heat that occurs through conduction to the outside air.

The connecting pieces can also be designed such that they by means of screw threads, bayonet lock, suspension etc. -1g1. convenient and reliable can be connected to each other.

Fig. R of the figures shows an embodiment of the partial capacitor represents: 1 it is outwardly in no way different from an ordinary post insulator.

There are f the two connections with your threaded pin v and the corresponding nut thread nz. The connecting pieces are cemented on both sides through the cementing point e onto the insulating tube r. The two assignments bb, which are separated by the dielectric i , are in conductive connection with the two connections. The documents b are thought to be rolled up cylindrically together with the insulating layers l. The remaining interspaces are filled by the Isolierausgußniasse p, which is introduced through the opening, leg filling screws s.

Fig. 2 shows one of the elements a1, a2, a3, a4 is a four-part capacitor assembled according to Fig.

Fig. 3 represents the capacitor according to Fig. 2, with metallic or insulating Rain roofs d, d, equipped, for installation outdoors.

The given shape for the partial capacitor is that of the usual ones modern post insulators, which have a smooth or a grooved surface with sufficient creep length. The partial capacitor can in this case as Construction elements absorb mechanical pressure, which is then in question comes when columns for high voltages are built from partial condensers, where the lowest element has to take up the weight of all the elements built above. If the mounting of the sockets is appropriate, the partial capacitor but also mechanically stressed as a tensile insulator and can accordingly be entire columns be arranged hanging. In addition, the built up from these partial capacitors Capacitor also used as a support or suspension insulator for fastening cables will.

The one housed inside the insulator forming the partial capacitor For its part, the capacitor can also be subdivided into several parts in series which, on the one hand, increases the security against breakdown, on the other hand, however, the potential gradient along the insulating tube forming the insulator is distributed more evenly than after a one-piece partial capacitor Fig.i is the case. Due to the even distribution of potential, all glow sparks can suppressed on the insulator surface and the breakdown voltage of the insulator can be increased significantly.

Fig. D. shows an embodiment of such a partial capacitor.

In Fig. 4, v, m, f and r have the same meaning as in Fig. I; k1, k, k3 represent the further subdivisions of the partial capacitor, which are overlooked each with two conductive sockets 1 to which the assignments are connected and the contact is created by their mutual contact.

It is, however, also any other subdivision than that in Fig 4. possible.

Claims (3)

PATENT CLAIMS: i. High-voltage capacitor composed of partial capacitors, characterized in that the series-connected partial capacitors have a chain insulator and each from one by one that is b ° -fested on both sides in conductive versions Insulating tube formed, hollow support or tension insulator exist, its inner Cavity the actual one consisting of lfetallbelegungen and insulating layers Includes condenser. 2. High-voltage capacitor according to claim i, characterized in that that the connection of the sockets of the partial capacitors by screwing, bayonet lock or other releasable connection takes place. 3. High voltage capacitor according to claim i and 2, characterized in that the mounting of the sockets with the insulating body of the partial capacitor is such that the assembled capacitor as Support element for mechanical pressure or tension can be used. q., high voltage capacitor according to claim; i to 3, characterized in that in the sockets of the partial capacitors Pour openings for filling the spaces with Isolierausgußmasse are attached. 5. High-voltage capacitor according to claim i to d., Characterized in that for the purpose of setting up the capacitor outdoors, include the partial capacitors conductive or insulating rain roofs are provided. 6. High voltage capacitor according to claims i to 5, characterized in that the capacitance of the insulator formed partial capacitor in turn from several series-connected Subdivisions. 7. High-voltage capacitor according to claim i to 6, characterized characterized in that the fittings of the partial capacitors and their subdivisions are provided with cooling surfaces to dissipate the dielectric losses.