The Transformer Rectifier Unit is intended for shipboard Helicopter Start applications.
There are three basic modes of operation:
- Powering the starter motor of a helicopter
- Providing a 28VDC supply to aircraft on-board equipment
- Providing an 18.2V DV supply for turning the helicopter turbo shaft engine at reduced speed for compressor washing
The Helicopter starting system may also include SFC, contactor boxes, control panels, socket boxes and cables etc.