SU100431A1 - Switch for autotransformers - Google Patents

Description

The subject of the invention is a switch for autotransformers, allowing the use of an autotransformer both in a voltage boost mode and in a voltage drop mode, made in the form of a flat switch in which there are concentrically located contacts on the electrical insulating plate, and a contact ring, and the rotary knob has two diametrically located contact brushes, one of which serves to electrically connect the contacts with the contact half-rings, and the other for the latter compound with a contact ring.

The proposed switch

for autotransformers, in contrast to the known ones, it provides a doubling of the number of voltage steps compared with the number of taps from the winding of the autotransformer.

This is due to the fact that each contact is electrically connected to two contacts located symmetrically with respect to the middle contact connected to the contact-ring, and the contact half-rings are connected: one to the terminal connected to the pole of the network, and the other to the terminal connected to pole load.

The circuit diagram of the switch for the autotransformer is shown in the drawing, where the AT is the autotransformer; / C / V - slip ring; KP and kshtakgny semiring; OL - rotary knob; Shch1 and Shz - contact brushes; SL - signal lamp; / - contact for connecting the signal lamp; 2-W - contacts to which taps from the winding of the autotransformer are connected; L and B - clamps for connecting the switch to the network, C and H - clamps for connecting the cable.

The first tap, € l, is used to apply network voltage to the winding of the AT autotransformer. attached to the middle contact 6 and the contact ring KK. The second tap is connected to pins 5 and 7, which are symmetrically located relative to the middle pin 6. Subsequent tapings are connected to pins 4 and 8, 3 v (9, 2 W, respectively).

In the case of a larger number of voltage levels, the number of taps and contacts is increased accordingly.

In the position of the rotary knob PR, when the brush U is coupled with the contact /, the signal lamp of the TL is ignited, indicating that the winding of the autotransformer is disconnected from the pole of the network.

When mating the brush U) with pin 2, the coil of the auto-transformer will be connected to the poles of the network. In this case, a low voltage will be applied to the load (clips C and D). Moving the brush / Zn (i to pin 3, as well as 4, 5 n 6), the load on the load will increase and when the brush is applied, with the contact 6 it will reach the value of the mains voltage.

Moving the Z / d brush to contact 7, as well as 8, 9, and 10, provides an increased voltage to the load.

Subject invention

A switch for autotransformers, POSOLVOLUTN1, II use the autotransformer as 1 in the voltage boost mode, so in the lower voltage mode, made in the form of a flat switch, in which there are concentric contacts, two contact half rings and a contact ring on The Novor's handle has two diametrically disposed contact sockets, one of which serves to electrically connect the contacts with the contact half-rings, and the other for connecting the next fewer ones from the edge. With the aim of doubling the number of voltage levels compared to the number of losses from the autotransformer winding, two contacts electrically connected to each of the spurs are located symmetrically with respect to the average 1sact connected with the contact ring, and the contact half-rings are connected: one with a clip connected to the network zero, and the other with a clip connected to the load load.