Power supply systems of devices STSB

Power supply systems of devices STSB

The Power supply system an alternating current . At a power supply system of automatic lock-out by an alternating current alarm installations receive power supplies from two transformers attached to lines of the core (BЛ СЦБ) and reserve (BЛ ПЭ) a food (fig. 254).

Line of a longitudinal electrical supply — a reliable reserve for a food of devices of automatic lock-out at stopping delivery of the electric power from VL СЦБ. This line eats from traction substations.


At equipment BЛ ПЭ in flight between two next support of a contact network in an alignment of wires of a line establish a special reserve power support. On a support mount the linear transformer of type the OHM together with switching and protective equipment.

From a secondary winding of the reserve transformer pressure moves on a cable in a relay case of an alarm point on rear contacts of the emergency relay And type АСШ2-220. Normally devices of automatic lock-out eat through front contacts of the emergency relay from the basic linear transformer included in a high-voltage line. At a break of giving of pressure in this line of the device of automatic lock-out eat from the reserve transformer of a line of a longitudinal electrical supply.

In case of absence of the second high-voltage chain apply reservation of linear transformers under the scheme resulted on fig. 255, and. Transformers establish on the next support. With the help разъединителей any transformer disconnect from a line, and the site of a high-voltage chain is ready for repair or elimination of damages. Sometimes for the same chains a reserve food carry out on the chain of low (220) pressure suspended on alarm traverse from the next alarm point (fig. 255,). In both cases transition from the basic food to the reserve is carried out automatically by means of the emergency relay.

On sites with electrodraught of an alternating current and rail chains frequency of 25 Hz arrange a reserve food from wires of system DPR 27,5 кВ or lines of longitudinal power supply 35 sq. Alarm points receive a reserve food from complete single-phase transformer substations (КТПО) through type transformer G 3HOM-35-65 (fig. 256).

For a reserve food of alarm installations it is supposed to use the transformers feeding with the electric power of linear consumers, except transformers for the travelling tool. Placing of linear transformers of the basic and reserve food on one support is not supposed.


As linear transformers apply lowering transformers of type the OHM, thus rail chains, the engine of the code transmitter, a lamp of a traffic light and дешифраторная a cell eat an alternating current. Lamps of traffic lights and дешифраторная ячейпитаются from the alarm transformer of type СОБС, and rail chains — from the travelling transformer of type ПОБС. On fig. 257 the scheme of power supplies of alarm installation of code automatic lock-out is shown at electrodraught of a direct current.

All equipment of alarm points is in metal relay cases. On two-acceptable sites for signalling devices of each way the separate relay case is provided. Such division of devices provides autonomy of their action.

Chains of power supplies from power transformers of lines of VL СЦБ and VL ПЭ both at single, and at the coupled alarm installation lay in different trenches and, besides, at the coupled alarm installation connect in different relay cases so that at damage of one line a food moved on another.

In relay cases devices eat pressure 12 In a direct current from two rectifiers. The devices of the relay case which has been not connected by linear chains, connect to the rectifier дешифраторной cells (I and). The devices feeding linear chains, connect to rectifier BPSH (ЛП and ЛМ).

Devices protect from overloads and short circuits by automatic switches and fuses on 20 And.

For protection of devices of a rail chain against influences of short circuits in a contact network and lightning discharges on the feeding and relay ends of secondary windings of throttles-transformers establish nonlinear equalizers.


Advantage of a power supply system an alternating current consists that local power supplies — accumulators are not required. However automatic lock-out action can be broken at alternating current deenergizing. Therefore such system demands reliable bilateral power supplies of a high-voltage line and reliable reservation from VL ПЭ.

The scheme of power supplies of automatic lock-out at electrodraught on an alternating current of industrial frequency is similar to the scheme of power supplies of automatic lock-out at electrodraught on a direct current. A difference only that frequency of 25 Hz include static converters of frequency of type ПЧ50/25-100 which place in relay cases in feed circuits of rail chains. In alarm installations of single-line automatic lock-out and in the coupled alarm installations of two-acceptable automatic lock-out the frequencies feeding rail chains, it is necessary to include converters противофазно to reduce currents подмагничивания and loading of transformers of type the OHM.

The Mixed power supply system . On sites with independent draught use the mixed power supply system. At such power supply system automatic lock-out devices receive the electric power of an alternating current from In L СЦБ, and at alternating current switching-off all devices and rail chains eat from accumulators.

In relay cases the voltage of 220 V arriving from the linear transformer, goes down transformer T1 of type СОБС to 12 In and is used for a food светофорных lamps. Rail chains eat from the travelling battery GB consisting of one acid accumulator of type АБН-72 or АБН-80 and working in a buffer mode with the rectifier of type ВАК-14 (fig. 258). The rectifier of type ВАК-13 or ВАК-16 recharges the alarm storage battery GB consisting of six accumulators which feeds a linear chain and the relay of an alarm point. Transformer T2 of type ПОБС or СОБС-2А and transmitter KPT is transferred in a rail chain by impulses of an alternating current of code combinations of the automatic locomotive alarm system.

In case of stopping delivery of an alternating current of a lamp of a traffic light through rear contacts of the emergency relay And continue to receive a food from the storage battery which stock of capacity is calculated on continuous work without подзаряда within days.

Storage batteries take place in батарейном a case which is near to a relay case. The rectifiers working in a buffer mode with accumulators, have only in relay cases.

In a cable box of a chain a voltage of 220 V protect the automatic switch of repeated action of type АВМ. In a relay case of a wire are protected by safety locks of plug type on 20 And which use and as разъединители for pressure deenergizing at repair and tests. For protection of devices in a case from hit on them of a high voltage from a high-voltage line through the transformer of type the OHM in a chain a voltage of 220 V is included by rated sportsmen of type РВНШ-250. Such rated sportsmen connect in a cable box, and also on devices of rail chains.


Considerable improvement of regional power supply systems, high reliability and independence from each other points of an electrical supply of VL СЦБ and a longitudinal electrical supply, and also a construction of these lines on ferro-concrete support with a suspension bracket of wires of marks ПС-25 and АС-35 and sectioning realisation have allowed to refuse a construction on sites with independent draught of automatic lock-out with rail chains of a direct current, i.e. to refuse the mixed power supply system.

On sites with independent draught basically use code automatic lock-out with rail chains of an alternating current frequency of 50 or 25 Hz.

The scheme of power supplies of alarm installations for rail chains frequency of 50 Hz will be similar to power supplies scheme at electrodraught of a direct current. Rail chains of 25 Hz eat frequency from converters of frequency ПЧ50/25-100.