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Rotary Roto Phase Converter Transmitter

Standard Features:

  • Balanced voltage tolerance within 5% under all loading conditions
  • Designed for 24 hour continuous operation
  • Built in surge protection to prevent damage from lightning strikes or power surges in utility lines

The TM Series Roto-Phase converter is engineered to operate three-phase radio and television transmitter equipment from a single-phase power supply. The major problem with establishing a transmitter site isn’t in finding a good location that is affordable, but it is finding a site with the proper power supply to operate the equipment load. Most locations would have single-phase power available at the location site, but not the commercial three-phase power needed to operate the transmitter equipment. The advantage to using three-phase transmitter equipment is due to the fact that it operates better than the single-phase equipment. The rectified output of a three-phase transmitter has less of a ripple than the single-phase transmitter and requires less filtering to produce a clean output.

If the availability of the three-phase power does not exist or it is not economically feasible, then the TM Series Roto-Phase converter could be the solution to your problem. The TM Series Roto-Phase converter opens the door for locations to operate transmitter equipment from 5 KW and larger which require a three-phase power input. Models are available in 208, 230, and 460 VAC.


  • Magnetic Starter with Overload Protection & PB ON/OFF Station or a Time-Delay Relay
  • Fused Disconnect Switch
Rotary Roto Phase Converter Diagram
Ship Wt.
TM5 17.00? 14.00" 13.00" 10.00" 12.00" 16x12x6 171 Lbs.
TM7 19.00" 16.00" 16.00" 12.00" 12.00" 16x12x6 275 Lbs.
TM10 23.00" 18.00" 21.00" 13.00" 13.00" 18x18x10 482 Lbs.
TM15 25.00" 20.00" 24.00" 14.00" 15.00" 18x18x10 687 Lbs.
TM20 27.00" 22.00" 25.00" 15.00" 17.00" 24x24x10 975 Lbs.
TM25(**) 25.00" 20.00" 24.00" 14.00" 15.00" 18x18x10 1286 Lbs.
TM30(**) 25.00" 20.00" 24.00" 14.00" 15.00" 18x18x10 1375 Lbs.
TM40(**) 27.00" 22.00" 25.00" 15.00" 17.00" 24x24x10 1975 Lbs.
TM45(***) 25.00" 20.00" 24.00" 14.00" 15.00" 24x24x10 2061 Lbs.

Dimensions given are not certified.
Case size and shipping weights are subject to change without notice.
ARCO Electric reserves the right to make product changes without prior notice.
Specify 230 V or 460 V. Orders placed without specified voltage 230 will be used.

(**)Two Units Paralleled (***)Three Units Paralleled

NOTE: When ordering the phase converter with the magnetic starter control package, you will need to add the Prefix Letter “C” (Automatic unit with starter, OL protection, and time-delay relay), or Prefix Letter “C/” (Manual unit with starter, OL protection, and push button START/STOP station).

With the addition of optional features, the panel size of the phase converter model may change – Please Consult Factory.

ARCO Electric Products reserves the right to make product changes without prior notification.

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Contact ARCO

Home Office:
2325 E. Michigan Road
Shelbyville, IN 46176-3400
Toll Free: 800-428-4370
Direct: 317-398-9713
Fax: 317-398-2655
Location Manager:
Dustin Shoaf
Sales Manager:
Tim Drake
Tony Abdou