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Transformers

Voltage control transformers are used in electrical circuits that require constant current or constant voltage with a low power or volt-amp (VA) rating. Filtering devices, such as capacitors, are used to minimize the variations in the output and voltage transformers are used to stabilize the brief periods of overload or inrush current. This momentary inrush current occurs when electromagnetic components, such as contactors, relays, timers and solenoids, are energized at start up. When start up occurs, most electromagnetic devices require anywhere from three to ten times their normal operating current for thirty to fifty milliseconds. Voltage stability is required during this time.

Low voltages are typically used in control circuits. These types of control circuits can be found in a control room, on a starter panel door or on the machine itself. It would be a safety hazard to have high voltages used in these applications or to have densely packed control wiring carrying high voltages inside a starter panel. For these reasons, low voltages are used.

Voltage control transformers are used in industrial starter circuits where the main circuit voltage is too high for use in the control circuit and where a separate control circuit feed would not be practical. Power can be tapped off of the main feed and passed through a control transformer which could then supply the lower voltage needed. Heavy electrical machinery run on higher voltages, however, the contactors that start the machinery operate at much lower voltages. Instead of running separate cables or installing extra bus bars, the main circuit voltage can be stepped down using a control transformer to the lower voltage required.

Products

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$47262.65
Eaton N48M28B15CUNV - K-Factor Non Linear Transformer, Non-Ventilated, K-13, Three-phase, PV: 480V, Taps: 2 at +2.5% FCAN, 4 at -2.5% FCBN, SV: 208Y/120V, 80°C, 15 kVA, Cu windings, Elec. Shield, Frame: 915DN
$33189.79
Eaton N48D25F15CUNV - Totally enclosed non-ventilated transformer, KT-13/DT-3E, Three-phase, Primary voltage: 480V, Taps: 2 at +2.5% FCAN, 2 at -2.5% FCBN, Secondary voltage: 220V, 115°C, 15 kVA, Cu windings, FR912BN, 599A, ES, 60 Hz, NEMA 3R
$92270.69
Eaton N48B28B45CUNV - K-Factor Non Linear Transformer, Non-Ventilated, K-13, Three-phase, PV: 480V, Taps: 2 at -5% FCBN, SV: 208Y/120V, 80°C, 45 kVA, Cu windings, Elec. Shield, Frame: 916AN
$61073.35
Eaton MD118E73NV - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460 delta, 150°C, 11 kVA, Al windings, Frame: 917N
$10283.05
Eaton MD075E88ZZ - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 230 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 230Y/133V, 150°C, 7.5 kVA, Al windings, Frame: 908S
$17701.21
Eaton MD34E66 - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 380Y/220, 150°C, 34 kVA, Al windings, Frame: 912B, uses WS38
$14345.53
Eaton MD27E79 - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 480 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 480Y/277, 150°C, 27 kVA, Al windings, Frame: 912B, uses WS38
$12835.49
Eaton MD14E92ES - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 14 kVA, Al windings, Elec. Shield, Frame: 912B, uses WS38
$17690.74
Eaton MD14E92CU - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 14 kVA, Cu windings, Frame: 912B, uses WS38
$55851.10
Eaton MD118E79CU - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 480 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 480Y/277, 150°C, 11 kVA, Cu windings, Frame: 916A, uses WS19
$66494.89
Eaton MD118E73FCU - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460 delta, 115°C, 11 kVA, Cu windings, Frame: 916A, uses WS19
$36891.50
Eaton MD118E73 - Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 480 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 480Y/277, 150°C, 11 kVA, Al windings, Frame: 916A, uses WS19