Recent Projects

Maintenance Car Power Supply

The Maintenance Car Power Supply is used on underground railway maintenance cars where diesel generators cannot be used. It consists of a 18kW battery charger and an isolated 22kW single phase 240V AC inverter.

The battery charger charges the maintenance car batteries at the depot where it was supplied with 415VAC 3 phase shore supply.

During a maintenance run (away from the shore supply) the inverter powered by the batteries supplies the maintenance car power needs – lighting, refrigerators, microwaves, computers, power tools.

Battery Charger Specification

Input: 415VAC 3-phase

Output: 280V DC batteries

Inverter Specification

Input: 280VDC (Battery)

Output: 240VAC 1-phase


Maintenance Car Power Supply with front panels off


Maintenance Car Power Supply