Power supplies from the high-voltage wires suspended on support of a contact network

Power supplies from the high-voltage wires suspended on support of a contact network

On occasion for almost impassable sites of roads with electric draught of the alternating current, having system DPR, under the permission of Ministry of Railways it is possible to project single-phase lines pressure 27,5 кВ with a suspension bracket of one special wire СЦБ on support of a contact network and use of a rail as the second wire (fig. 259). A wire pressure 27,5 кВ suspend on single-line sites together with one of wires ДПР on the double console extreme from a field, on two-acceptable sites — from the party opposite to wires ДПР.

A reserve food of automatic lock-out in this case is provided from one of wires ДПР (fig. 260). Complete transformer substations (КТПО) have type transformers 3HOM-35/65, lowering pressure with 27,5 кВ to 220 Century

The transformer 77 is intended for a food only automatic lock-out devices. Both transformers are protected by rated sportsmen and fuses. For switching-off of transformers from high-voltage lines there are three unipolar разъединителя with drives of hand control PI, Р2 and РЗ (fig. 259 see).

Разъединители are connected to the grounding device so that at opened разъединителях primary windings of transformers were earthed. Besides, at opening of the door blocking access to the transformer, case KTPO also is earthed that guarantees against occurrence on КТПО potential between a rail and the earth.

The complete transformer substation has a low-voltage case with switching centres from which chains of the basic and reserve food are connected to a relay case of automatic lock-out. The emergency relay of L through which front contacts receive a food all devices of a relay case is included in a chain of the basic food. Through rear contacts of the relay And the reserve feed circuit is connected.

Alarm transformer ST, transmitter KTP engine, rectifier BPSH and the converter of frequency ПЧ50/25 eat a voltage of 220 V. From transformer ST receive a food of a lamp of a traffic light and дешифраторная cell ДЯ Devices of the relay case eating a direct current by pressure 12 In, connect to the rectifier дешифраторной cells (I and), and the devices feeding linear chains, — to rectifier BPSH (ЛП and ЛМ). At such power supply system of devices of a relay case of automatic lock-out rail chains eat a current frequency of 25 Hz, and devices — a current frequency of 50 Hz. The converters of frequency ПЧ50/25 placed in relay cases of an alarm point of automatic lock-out, will transform frequency of 50 Hz to frequency of 25 Hz.


At a food of devices of automatic lock-out from the high-voltage wires suspended on support of a contact network, the special high-voltage lines of automatic lock-out suspended on separate support are not necessary. At the expense of use of line ДПР the food reserve considerably improves. To perform works on a high-voltage feed circuit of devices of automatic lock-out it is possible only at the disconnected pressure from all chains of a contact network.


For the basic food of devices of automatic lock-out a high-voltage wire partition on an insulator and by means of a loop connect to КТПО. Thanks to it with the help разъединителей Р1 and Р2 the power transformer 77 can be connected to the left or right shoulder of a line, and it is possible to unite both shoulders without transformer deenergizing. To КТПО connect system DPR wire to which connect transformer T2 used for a food of linear consumers and as reserve for an alarm point. The second ends of high-voltage windings of power transformers connect to case KTPO, and last connect to rails through an average point of the throttle-transformer. Secondary windings of power transformers connect to a distributive guard of a low-voltage case on loadings.