ZH1800 Series

Flat battery power supply for rail vehicles

Flat battery power supply

Power is supplied to passenger coaches from the locomotive via the train line. Static onboard inverters transform the high voltage from the train line into the desired load voltages. The control voltage necessary for operating the inverters is provided by a vehicle battery.

In the event of a flat battery, the static inverters and contactors are fed by the flat battery power supply for approximately 3 × 3 minutes directly from the high voltage of the train line.


  • Static inverter with power factor adjustment
  • Providing control voltage for static inverters of power supply equipment directly from the train line
  • Suitable for all train lines carrying voltages to UIC 550 and rail vehicles with high-voltage inverters providing power from the train line
  • Operational reliability:
    • Failure free operation and supply with rolling stock
    • No cancellation of train service because of flat batteries

By selecting this option you finish the configuration.



Input voltage range to UIC 5501 kV AC, 16 2/3 ... 60 Hz
Output voltage24 V DC
Output current IO max13.5 A
Total power (3x3 min. cycle)320 W (no derating)
Switch ON voltage>865 Vs and <1,800 Vs
Switch OFF voltage<750 Vs and >2,300 Vs
ProtectionShor circuit / thermal / overload
Relay outputat UA >18 V contact bridged to -UO
Transient time3 msec
Efficiency load max./ 50% partial load>80% / >82%
Temperature: permanent / for 10 min / storage / short time-25 °C ... +70 °C / -40 °C ... +85 °C / -40 °C ... +50 °C / 90 °C
Dimensions (L x D x H) short PCB350 x 338 x 42.5 mm
Dimensions (L x D x H) long PCB---
Weight4.2 kg
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Electrics for rolling stock
ZH1800 – Flat battery power supply for rail vehicles