RoMan Resistance Welding Transformers
T. J. Snow carries a full line of RoMan new and used resistance welding transformers to fit your application. RoMan designs and manufactures three types of water-cooled transformers – MFDC transformers, fixture type and machine type transformers. They are designed to meet any resistance welding application requirements—from small spot welds to large projection welds, and can be integrated with any brand of controls, weld-guns or robotic systems.
MFDC / Inverter Type Welder Transformers
RoMan’s MFDC transformer is compact, robust and ideal for robotic and projection/stud welded parts.
- kVA Range: 40 – 1,000 kVA
- Primary Volts: 325-800 Volts
- Frequency Range: 400-2500 Hz
- Standard models are listed below. Contact us for details about models and voltages not listed.
Fixture Type Welder Transformer
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
Machine Type Welder Transformer
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
MFDC / Inverter Type Welding Transformers
| 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-8438 | 650/1000 | 9 | M | 47.4/21.5 | TDC-1042 ; | 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 | ||
| 225 | TDC-7537 | 650/1000 | 13.0-17.5 | M | 108/49 | Y | ||
| 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 TRANSFORMER
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 TRANSFORMER
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 .