Resistance Welding Transformers

T. J. Snow carries a full line of new and used resistance welding transformers to fit your application.

If you do not find a model below that is suitable for your application, please contact us as there are many models and options available by request.

MFDC/ INVERTER TYPE

This compact and robust RoMan transformer is ideal for robotic and large projection welding applications.

  • KVA Range: 40- 1000 KVA
  • Primary Volts: 325 – 800 Volts
  • Frequency Range: 400- 2500 Hz
  • Standard models are listed below, contact T. J. Snow for details about models/ voltages not listed.
KVA Rating @50% Model # Primary Volts/Hertz Secondary Volts Metric/Imperial Weight lb/kg Replaces Normally In Stock
40  TDC-1057 340/1200 2.23-4.47 I 50  N
100 TDC-5583 650/1000 9 M 47.4/21.5 TDC-1042 ;

TDC-1064

Y
100  TDC-5618 500/1000 9.1 M 47.4/21.5 N
100 TDC-5748 800/1000 9 M 47.4/21.5 N
160  TDC-5998 650/1000 9.0-13.0 M 70/32 TDC-5610  Y
160  TDC-5826 500/1000 9.0-13.1 M 70/32  N
160  TDC-5999 800/1000 9.0-13.1 M 70/32  N
160 TDC-6650 650/1000 9.0-13.0 M 70/32  N
160  TDC-6827 800/1000 9.0-13.1 M 70/32  N
170  TDC-1070 650/1000 9.5-13.0 I 45/100 Y
170  TDC-1078 650/1000 9.5-13.0 M 45/100  N
170  TDC-5620 800/1000 9.5-13.1 M 45/100  N
170 TDC-6599 325/1000 9.5-13.0 M 45/100  N
225 TDC-7000 650/1000 13 M 110/50  N
225  TDC-7080 500/1000 13.1 M 110/50 N
320  TDC-5874 500/1000 9.0-13.1 M 190/86  N
320  TDC-5876 650/1000 9.0-13.0 M 190/86  Y
320  TDC-6128 800/1000 9.1-13.1 M 190/86  N
320  TDC-7099 500/1000 9.0-13.1 M 250/114  N
320 TDC-7015 650/1000 9.0-13.0 M 250/114  N
320 TDC-7021 800/1000 9.09-13.11 M 250/114  N
400  TDC-5447 500/1000 9.0-13.1 M 435/198  N
400  TDC-5422 650/1000 9.5-13.0 M 435/198  N

 

FIXTURE TYPE

The RoMan fixture type transformer is the perfect choice for multi-spot welding applications. This flexible, water-cooled transformer is easy to adapt to your specific application. Built to RWMA specifications, there are many options and configurations available.

  • KVA Range: 25 – 200 KVA
  • Voltage:
    • 240 Volts, 50 Hz
    • 480 Volts, 60 Hz
    • 575 Volts, 60 Hz
  • Options:
    • Secondary Parallel Bar Kit
    • Secondary Series Bar Kit
    • Grounding Reactor
  • Standard models are listed below, contact T. J. Snow for details about models/ voltages not listed.
Model # KVA Volts/ Hertz Secondary Volts (min – max) Weight (lbs)
F48660A1SALX 60 480 / 60 3.58 – 5 140
F48685B1SELX 85 480 / 60 5.39 – 7.06 185 Typically in stock
F486120J1SELX 120 480 / 60 7.16 – 9.06 225 Typically in stock
F486150D1SELX 150 480 / 60 9.41 – 11.43 270 Typically in stock
F486200DL1SELX 200 480 / 60 12.63 – 15.5 385 Typically in stock

MACHINE TYPE

RoMan’s machine type transformer is used in a variety of applications such as spot, press, seam, rocker arm and more. This robust, water cooled transformer conforms to RWMA standards. The transformer connects to the welding tooling on the upper and lower knee by bus bars or laminated shunts.

  • KVA Range: 20 – 500 KVA
  • Standard Primary Voltages:
    • 240 Volts, 60 Hz
    • 480 Volts, 60 Hz
    • 575 Volts, 60 Hz
  • Standard models are listed below, contact T. J. Snow for details about models/ voltages not listed.
Model # KVA Volts/ Hertz Secondary 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 Typically in stock
M446200PL1BNLX 200 440 / 60 7.45 – 11.28 567 Typically in stock
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

Where’s my tap switch?

You might have noticed newer RoMan fixture type transformers have an updated design from previous models. The rotary tap switch used to change the secondary voltage output is no longer offered and has been replaced with a stud mount design. To access the stud mount, turn off the welding machine, remove the end plate and connect one wire to the C stud and the other wire to the numbered stud required for your secondary voltage output requirements.

Further information about resistance welding supplies, prices, or what equipment you should use for your application are only a phone call or email away. Feel free to contact us anytime. Information about Weld Checkers and Force Gauges .

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