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A basic Staco variable transformer consists of a copper winding on a
toroidal core of laminated, grain-oriented, silicon steel. A carbon
brush, connected to an output terminal, is rotated over the length of a
precision-ground, precious metal-plated, commutator track to tap off
voltage at any turn from zero volts to the maximum output voltage of the
winding. Unlike a standard fixed ratio transformer, a Staco variable
transformer
is designed to provide variable output voltage that can be adjusted from
0 to 117% of the unit's input voltage.
Ventilated steel case with line cord, receptacle, illuminated on/off switch and fuse. 3PN prefix : three conductor line cord and matching receptacle
Manufacturer part# : 3PN1010B
Input voltage : 120Vac 50/60Hz
Variable output : 0 - 140Vac , 10 Amps maximum
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