Roman Transformers

Fixture Type

Roman Transformer Fixture Type - Production Engineering

Fixture type water-cooled transformers are ideal for multi-spot welding fixtures. Designed to have industry standard RWMA staggered secondary lugs, 3/8 – 16 studs for primary voltage connection, multiple selections for frequencies and secondary voltages, with primary access on five sides, over temperature thermoswitch and 1/4 – 18 NPT water connections.  The size and capability of our Fixture Transformer units can be designed to meet your application’s requirements. Our standard Fixture type transformers feature:

  • KVA Range:  25 KVA – 200 KVA (rated at 50% duty cycle)
  • Primary Voltages:
    • 400 Volts, 50Hz
    • 480 Volts, 60Hz
    • 575 Volts, 60Hz
  • Fully encapsulated to ensure long life
  • Optional accessories:
    • Secondary Parallel Bar Kit
    • Secondary Series Bar Kit
    • Grounding Reactors
    • Available remotely mounted Switchgear / Tap Switch
    • Over temperature thermoswitches

Standard models typically in stock are listed below, contact Production Engineering for details about models/ voltages not listed.

Model #KVAVolts/ HertzSecondary Volts (min – max)Weight (lbs)
F48660A1SALX 60 480 / 60 3.58 – 5 140
F48685B1SELX 85 480 / 60 5.39 – 7.06 185
F486120J1SELX 120 480 / 60 7.16 – 9.06 225
F486150D1SELX 150 480 / 60 9.41 – 11.43 270
F486200DL1SELX 200 480 / 60 12.63 – 15.5 385

Machine Type

Roman Transformers Machine Type - Production Engineering

Machine water-cooled transformers are ideal for press, seam, rocker arm, cross wire and other welding applications. Available in various frequencies and secondary voltages. Size and capability of our Machine Transformers can be designed to meet your application’s requirements. Our standard Machine Type transformers feature:

  • KVA Range: 20 KVA – 500 KVA (rated at 50% duty cycle)
  • RWMA standard machine pad sizes and hole spacing
  • Primary Voltages:
    • 480 Volts, 60Hz (7 – 1/4″ x 9 – 1/4″ and 7 – 3/4″ x 10 – 1/4″ only)
    • 575 Volts, 60Hz
  • Fully encapsulated to ensure long life
  • Optional accessories:
    • Available remotely mounted Switchgear / Tap Switch
    • Over-temperature thermoswitches

Standard models typically in stock are listed below, contact Production Engineering for details about models/ voltages not listed.

Model #KVAVolts/ HertzSecondary Volts (min – max)Weight (lbs)
M44650NB1BNLX 50 440 / 60 4 – 7.9 339
M44675NL1BNLX 75 440 / 60 5.7 – 10 372
M446100NL1BNL 100 440 / 60 6.8 – 10 389
M446150PL1BNLX 150 440 / 60 6.4 – 11 546
M446200PL1BNLX 200 440 / 60 7.45 – 11.28 567
M446200PA1BNL 200 440 / 60 7.8 – 12.9 650
M446300VA1BOL 300 440 / 60 8.6 – 15.7 1085
M446400U1BPL 400 440 / 60 8.8 – 16.9 1465

MFDC / Inverter Power Supplies

Roman Transformers MFDC Inverter - Production Engineering

Lightweight water-cooled inverter power supplies are ideal for robotic welding applications.  Secondary current exceeds 500K amps, which can aid in the production of large projection welds. Available in various frequencies and secondary voltages. The size and capability of our MFDC units can be designed to meet your application’s requirements. Our Standard MFDC/Inverter Power Supplies feature:

  • KVA Range: 7 – 1,500 KVA
  • Primary Volts: 325 – 800 Volts
  • Frequency Range: 400 – 2,000 Hz
  • Size: Rectifier capacity from size 1-48
  • Thermoswitch Protection
  • Fully encapsulated to ensure long life
  • Optional accessories: Secondary pick-up coil

Standard models typically in stock are listed below, contact Production Engineering for details about models/ voltages not listed.

Model NumberMetric EquivalentKVAVolts/ HertzSecondary Volts (min – max)Weight (lbs)
TDC-1057   40 340 / 1200 2.23 – 4.47 50
TDC-1042 TDC-1064 100 650 / 1000 9 70
TDC-5610   130 650 / 1000 9 70
TDC-1070 TDC-1078 170 650 / 1000 13 100
TDC-5876   320 650 / 1000 9 – 13 190
TDC-1066   340 650 / 1200 10.8 275
Roman Transformers
Roman Transformers

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