• Tel. +38 (057) 768-07-92

  • Fax. +38 (057) 768-07-95

  • Ak. Proskury Str., 1 p.o. box 2831,

    Kharkiv, 61085, Ukraine


Undercar boxes:

Low-voltage box


The power supply system of passenger cars with an AC generator.




Provision of low-voltage network of the car with continuous current voltage obtained by rectification of three-phase voltage of an AC generator having a capacity of 35 kVAr or three-phase voltage from an external power supply box.


Technical characteristics

  • Value range of control voltage of direct current, V: 60...150
  • Range of outgoing line three-phase feed voltage, V: 0… 150 
  • Value range of output voltage of direct current, V: 0...150
  • Crest value of outgoing current А: 25
  • Rectification of input three-phase voltage
  • Optical alarm about the delivery of input three-phase voltage
  • Optical alarm and the issuance of a discrete signal for blocking inclusion YANV when you open its cover
  • Optical alarm about emergency situations in external power supply box
  • The issuance of a discrete signal for blocking car doors during train operation (at the generator frequency of more than 25 Hz)
  • The issuance of a discrete signals in case of emergency:

- phase interruption of generator

- leakage resistance of generator windings on the cabinet less than 5 kilohms

  • Current regulation of battery charge with mains supply of 380 V, 50 Hz


Overall dimensions, mm: 730 x 700 x 700
Weight, kg: no more than 120
Enclosure protection level: IP65 according to GOST 14254-96


Operating conditions


Climatic version: U.1 (temperate climate) according to GOST 15150-69
Operating temperature range: -50 ° C. .. +40 ° C
Mechanical design: M25 according to GOST 17516.1-90E
Single-acting blows with acceleration to 5 g
The average service life is not less than 28 years




Kryukov Railway Car Building Works (Ukraine)
The railways of Ukraine