Transformer Rectifier Unit

The Transformer Rectifier Unit type 3RC3kA provides a high quality
output of 27.4 volts dc when used for float charging valve regulated
lead acid batteries or can be set for 24V for ships 24V systems.
The TRU has an input isolation transformer and a 12 pulse thyristor
rectifier configured as two fully controlled bridges combined in
parallel by an interphase transformer. This produces a very smooth
DC output and eliminates all harmonics below the 11th from the
input current waveform. The input current to the equipment is close
to sinusoidal with a “traditional” lagging power factor dependent on
loading and mains voltage.
It is built into a custom built steel enclosure, 920mm x 723mm x
469mm overall dimensions, which is designed for bulkhead
mounting. The enclosure is suitable for direct mounting for shock
levels up to 30g, above this suitable shock mounts can be used.
Protection level is to IP23.

3RC3KA

Access for maintenance and repair is from the front via a hinged
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door that opens to the left, it will open to 180 with a minimum
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maintenance opening requirement of 90 . The door contains panel
meters, indicating lamps and the mains ON/OFF switch.
Louvres pressed outwards on the front and sides, with a grill on the
bottom of the assembly provide for fan assisted cooling during
normal operation, and natural convection when the Anti
Condensation Heaters are operating.