Power supplies of devices переездной the alarm system and semi-automatic blocking

Power supplies of devices переездной the alarm system and semi-automatic blocking

On the sites equipped with automatic lock-out or centralised traffic control, devices переездной alarm systems eat from high-voltage lines СЦБ. For a food of devices of autobarriers and lamps of traffic lights for motor transport a reserve food from storage batteries is provided.

On sites where automatic lock-out or centralised traffic control is absent, devices переездной alarm systems receive a food from existing transmission lines pressure 10 кВ, substations and networks 380/220 In from which energy to consumers not below II category with a reserve from the accumulator moves.

In the absence of local sources of the electric power it is supposed to feed devices переездной alarm systems from the next stations on the wires suspended on support of communication lines of Ministry of Railways.

On support of communication lines of a wire suspend with observance of following rules: pressure between wires should not exceed 250 In; wires have extreme from a field on top a traverse or on the special arms established on a top of support; at stations, in settlements and on approaches to them feeding wires have double fastening; on all extent feeding wires cross.

The battery of accumulators pressure 28 In (2 batteries on 14) ensures functioning of electric drives of barriers and reservation of fires переездных traffic lights at alternating current switching-off (fig. 261). At automatic переездной alarm systems without autobarriers establish the battery of accumulators pressure 14 V.Dlja of a food of the relay and automatic lock-out schemes use the rectifier of type БПШ. Division of power supplies allows to keep working capacity of automatic lock-out at damage of chains of management of an autobarrier.

At semi-automatic blocking station devices receive a food from the same sources, as automatic lock-out and centralised traffic control devices, and also from local power supplies — transmission lines pressure 10 кВ and existing networks pressure 380/220 In on which carry out an electrical supply of consumers not below II category.

On fig. 262, and the scheme a litany of relay semi-automatic blocking from local ЛЭП by pressure 10 кВ, on fig. 262, — from a line of a longitudinal electrical supply which usually passes near to ways is shown. In mouths of stations and about premises ДСП mount power support with transformers of type the OHM which attach to a line through support with разъединителями. From power support to relay cases lay usual alarm cables.

For supply of electricity from one station on another the suspension bracket of a power chain by pressure not above 250 In on support of communication lines of Ministry of Railways with observance of the special requirements specified above is in exceptional cases supposed.

If in local networks of an alternating current fluctuations of pressure more than 10 % to a food of rectifiers and светофорных lamps apply voltage stabilizers are observed. In devices RPB have found distribution electromagnetic stabilizers pressure of types С-0,5; С-0,75; С-0,9.

For a reserve food of devices of semi-automatic blocking at each station provide storage batteries (from accumulators of type АБН-72 or АБН-80) which are calculated on work of devices during 16 ч. Accumulators place in батарейных cases together with rectifiers of type ВАК or the special zarjadno-buffer device of type ЗБУ-12/10, which else is in operation.

The most economic device for a food of devices of semi-automatic blocking is the regulator of a current of the MOUTH as this device has two modes of a charge — constant подзаряд and the forced charge of the battery of accumulators the maximum current with possibility of their wide adjustment on a current and automatic switching.