variable transformer


Also found in: Acronyms.

variable transformer

[′ver·ē·ə·bəl tranz′fȯr·mər]
(electricity)
An iron-core transformer having provisions for varying its output voltage over a limited range or continuously from zero to maximum output voltage, generally by means of a contact arm moving along exposed turns of the secondary winding. Also known as adjustable transformer; continuously adjustable transformer.
References in periodicals archive ?
In this particular setup, the activating coil is directly driven by an AC signal from a variable transformer.
This innovation occurred at the same time the began using variable transformers for manual control of the projectors' luminance and guitar pedals to mix the sound, thus introducing novel elements into three processes of the system's conventional means of operation.
Supplies common sizes of stainless-steel cartridge heaters and variable transformers for manual temperature controls.
Available from 10 to 1200 amps/phase, at all standard voltages to 600-v AC, the 18 Series controls come in either phase-angle or zero-fired versions, and are alternatives to variable transformers. Units may be operated manually, or may be equipped to follow an analog milli-amp or DC voltage signal from a temperature controller or PLC.
Available from 10 to 1200 amps/phase, at all standard voltages to 600-volts a-c, the 18 series controls come in either phase-angle or zero-fired versions, and are alternatives to variable transformers. Units may be operated manually, or may be equipped to follow an analog milli-amp or d-c voltage signal from a temperature controller or PLC.
Available from 10 to 1200 amps/phase, at all standard voltages to 600-v a-c, the 18 series controls come in either phase-angle or zero-fired versions, and are alternatives to variable transformers. Units may be operated manually, or may be equipped to follow an analog milli-amp or d-c voltage signal from a temperature controller or PLC.

Full browser ?