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Staco VARIAC Variable Transformer 500 SeriesGo to Selector for other sizes Versatility, compactness and durability are included in the many designed-in features of the STACO 501-C Series Variable Transformers. These variable transformers operate from 120 volt input lines (240V in series & for three phase loads) and are rated at 5 amperes for constant current loads and 7 amperes for constant impedance loads at line voltage. The coil tapping arrangement permits output voltage of 0 to line voltage or 17% above line voltage on constant current line conditions. This units Faston® terminals are easily converted to screw connections with the terminal adapter kits supplied with each unit. The STACO 511 variable transformer is ideal for OEM applications with its panel mount, fixed shaft design and even smaller envelope than the 501B/501C variable transformer. It can be single point or four point mounted. The four point mounting is the same as the 501-B, 501-C transformers. Motor driven variable transformers are available and identified by the prefix "M" in the type number. The synchronous motor is designed for operation on 120 volt, 50/60 Hertz single phase lines and draws approximately 0.3 amperes. If a motor driven variable transformer is ordered, be sure to prefix the part number with the desired travel time from 0 to maximum of 5,15, 30, or 60 seconds. ** All 500 Series Variable transformers can operate to 2000 Hz without derating the specifications shown below. IMPORTANT NOTES About VARIAC Current Ratings 120V Single Phase Input with up to 140V Outputs
240V Single Phase Input with up to 280V Outputs
240V Three Phase Wye Input with up to 280V Outputs
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