PROJECT-ARRANGED POWER SUPPLY SYSTEM OF MEDIUM AND LARGE STATIONS (PKSEP)

PKSEP is designated for power supply of relay or microprocessor based interlocking devices of medium and large stations, at railway sections with any traction type.

Main functions

  • supplying power from:
  • two feeders of three-phase AC voltage 230/400 V with a dead-earthed neutral;
  • a diesel-generator set (DGA);
  • an accumulator battery (AB) with voltage 24 V;
  • from AB with voltage 240 V;
  • distributing, converting, and recording electric power;
  • three-level protection of power supply lines against atmospheric and switching overvoltages, short circuits, pulse overvoltages;
  • quality monitoring for electric power;
  • automatically switching a load;
  • monitoring malfunction of contactors of both feeders and monitoring availability of voltage on a guaranteed three-phase current power supply bus.

Composition

PKSEP includes the following devices:

  • an input panel;
  • an ShchOAB battery disconnection panel;
  • an ShVpR rectifying distribution cabinet;
  • an ShVR input distribution cabinet;
  • an ShGPL quaranteed logic power supply cabinet;
  • an ShTr transformer cabinet without battery backup;
  • an ShTr transformer cabinet with battery backup;
  • an ShSt points cabinet without redundancy;
  • an ShSt points cabinet with redundancy;
  • an ShD diagnostic cabinet;
  • an accumulator battery;
  • an automatic transfer switch panel.

It is possible to compose two main types of power supply systems:

  • with backup of loads from AB with voltage 240 V;
  • with backup of loads with voltage 24 V and voltage 230 V from AB with voltage 24 V.

Power supply backup time, depending on AB capacity, is from 10 minutes to 8 hours. Rated load capacity of the system is:

  • 25 – 40 kW;
  • 40 – 55 kW;
  • 55 – 80 kW.

ShGPL guaranteed
power supply cabinet

 

  

 

  ShSt with redundancy   ShSt without redundancy
         

 System advantages

  • design arrangement and scalability – allow designing a power supply system with the parameters required for a specific station;
  • has been developed in accordance with the requirements of area «1520»;
  • high “survivability” due to redundancy of main nodes;
  • possibility of remote switching-off of input feeders, DGA, and AB with a “single button” when emergency situations or a fire emerge;
  • possibility of manual selective switching-on/ switching-off of feeders;
  • a built-in microprocessor based system monitors and diagnoses power supply parameters and PKSEP hardware state recording the following parameters:
  • resistance of insulation as related to “ground” in circuits of power supply for signals, track circuits, relay racks, panels, electric switch machines, heating of electric switch machines;
  • voltage and current in each phase of input feeders;
  • voltage in output circuits of cabinets forming a part of PKSEP;
  • operability of units and devices, automatic switches, protective varistors, etc.;

  

 


Input panel
  
ShD diagnostic cabinet
  ShVpR
rectifying distribution
cabinet
         
  • possibility to monitor quality and periodicity of maintenance based on archive data:
  • DGA start on load with specifying its operation duration and recording feeder parameters;
  • service of station’s AB with switching-off a charger, operation of main and additional chargers;

  



 

ShTr transformer cabinet

 

  • diagnostics results and archive data allow the following at any time: to monitor equipment state, to determine pre-failure conditions, failure mode of power supply devices;
  • archives contain information on incidents in a power supply system, in particularly:
  • voltage absence on a supply feeder;
  • switching from one feeder to the other specifying a reason (voltage reduction, voltage increase by each of three phases of a power supply source, disturbance of phase sequence, etc.);
  • on switches, where there is current increase by normal transfer and operation on friction (based on curves of switch machine currents);
  • on modes of sparking on engine manifolds due to brush wear, brush assembly weakness, manifold contamination, etc.


SRPA “Impulse” is a leading Ukrainian designer, manufacturer, and supplier of highly-reliable instrumentation and control systems for nuclear power engineering and railways.
 
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