Tap switch fixed contact array of unequal turn positive and negative pressure regulating manner

Abstract

The invention relates to a fixed contact array for a tapping switch with a positive and reverse voltage regulation mode in transformer field. Variable array fixed contacts Xo, tail end fixed contacts X, Y, and Z of various phases, a fixed contact K of a primary coil, fixed contacts 1, 2, 3 ellipsis of voltage regulation coils, and connection conductors L of the fixed contacts form array changing methods such as a star connection array, a star connection grounding array and an angle connection array, so as to adapt to a positive and reverse voltage regulation tapping switch with circular switching and planar switching, and meet the need of unequal turn change of voltage regulation coils of a transformer. The array, overcoming the disadvantages of the prior art, has the following advantages: 1, the array has simplified arrangement and replaces an eight-line fixed contact structure with a seven-line fixed contact structure; 2, the connection conductors L among the fixed contacts finish the telex communication inside the switch, and the array has a tight and reliable structure; and 3, the change of the array is convenient, quick, orderly, diversified and normative.

Description

technical field [0001] The invention relates to a fixed contact array of a tap changer with unequal turns positive and negative voltage regulation in the field of transformers. Specifically, the array refers to the array arrangement of various fixed contacts with different functions, that is, the moving and fixed contacts. The switching area and the layout rules of the fixed contacts, and the configuration form of the telex connection. Background technique [0002] At present, generally there are two kinds of distributed configuration forms of the fixed contacts of the tap changer with positive and negative voltage regulation methods for general transformers, that is, one is circular switching and the other is planar switching. The following is only an example of a star-connected 4-tap 5-position forward and reverse voltage regulation tap-changer fixed contact distribution structure, as shown in Figure 1 and Figure 2; this example only shows phase A ( Tap changer or single-...

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Problems solved by technology

[0009] 1) The existing technology is star contact fixed contact X 0 The electric connection between each phase is arranged outside the outer insulator of the tap changer, (X in Figure 1 0 The position is shown outside the circle on the right side of the outer insulator, and the corresponding position is indicated by a dotted line in Figure 2), which often requires the transformer manufacturer to use an external connection with a cable, which makes the tap changer not tight enough and increases the workload of the user;

[0010] 2) The self-connecting leads L of various fixed contacts connected to the taps of the voltage regulating coil are also mostly set outside the outer insulator 6 of the tap changer. In order to prevent these exposed connecting leads L from discharging with adjacent conductors in the transformer, it is necessary to Cover with a ring of insulating tubes, consume more materials and increase the process;

[0012] 4) At present, in drum-shaped, tube-shaped and even strip-shaped, plate-shaped tap changers with positive and negative voltage regulation methods, although the above-mentioned fixed contact structure has been used to solve the method of combining unequal turns of the voltage regulation coil, but still make its structure less than the most simplified

Looking at Fig. 1 and Fig. 2 in the prior art, the fixed contact structure of this positive and negative voltage regulation (star connection) 4-tap 5-position tap-changer is composed of eight rows of fixed contacts. If it is compared with the fixed contact array of the present invention provided below by combining seven rows of fixed contacts, it becomes complicated

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