Majestic Transformer Co Supplier, Designer, and Manufacturer of Custom Built Transformers, Chokes, and Associated Power Supplies
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Open Frame Control Transformers Single Phase


Open Frame Single Phase Control TransformerTypical applications for this type of transformer are motor control, machine tool control, control panels, alarm systems, distribution boards etc. The transformers are supplied as open types with universal frames for vertical or horizontal mounting and either terminal blocks or brass stud connections.

Virtually any combination of voltage and current, at any frequency, can be supplied on both primary and secondary. In addition, multiple primary and secondary windings can be accommodated. Complex or high voltage windings may require a larger frame size to be used to accommodate the windings. Transformers in this range can also have fuses fitted on the top panel.

TOTAL SEC VA RATING SIZE (in mm)
W x D x H
Dispatch Within
20VA 66 x 51 x 75 7/10 days
50VA 67 x 67 x 100
100VA 84 x 102 x 122
200VA 99 x 102 x 141
250VA 114 x 115 x 157
500VA 114 x 153 x 157
750VA 140 x 152 x 188
1kVA 140 x 178 x 188
2kVA 165 x 170 x 220 10/14 days
4kVA 196 x 210 x 260
6kVA 196 x 260 x 260
9kVA 356 x 230 x 340 2/4 weeks
20kVA 356 x 280 x 340
30kVA 356 x 360 x 340

These transformers are also available with enclosures for wall mounting or floor standing
- see Industrial Cased Transformers Single Phase.


Please contact our SALES OFFICE for full details.