Popular Variable Transformers and AC Power Supplies Product Guide AC Voltage Control Guide Devices Guide TM Your Tailored Power Solutions Provider www.stacoenergy.comStaco Energy Products Co. has been a leading manufacturer of variable In addition to the basic styles illustrated, Staco Energy can meet your transformers for over 65 years, building standard and custom- specific requirements with hundreds of additional standard model designed products for industrial, commercial and military applications. variations and configurations from 0.8 to 450 amps, 120 to 575 volts, Variable transformers have many industrial and laboratory applications 50 Hz and up. 480 volt units are shown on page 8 and in our Variable as basic components to control voltage, current, power, heat, speed, Transformer Voltage Control Catalog (VT-5). These models include light and electromechanical force. cased and uncased, single and three phase manual and motor driven models, and complete voltage control systems. Complete information A basic Staco variable transformer consists of a single layer magnet is contained in our Variable Transformer Voltage Control Catalog. wire winding on a toroidal core of laminated silicon steel. A carbon brush, connected to an output lead, is rotated over a precision To serve your needs promptly, Staco Energy has a national network of ground, plated commutator track to tap off voltage at any turn from stocking distributors to assure immediate off-the-shelf delivery. Your zero to the maximum output voltage of the winding. local Staco distributors and representatives are factory trained, and capable of assisting you in selecting the particular Staco transformer Staco research has developed design features and proprietary pro- best suited for your application. cesses to provide longer lasting, more reliable products. Particularly important is the high-temperature foundation material bonding the Contact our factory or visit the Where to Buy section of www. coil securely to the core assembly. This material has a high thermal StacoEnergy.com for the name of the distributors or sales representative transfer characteristic so that it dissipates heat from the brush contact in your area. area, increases the heat distribution of the core itself, and provides For nonstandard products (to meet your special application needs) our the transformer with greater tolerance to transients and short-term engineering staff will quickly respond with custom solutions to your overloads. application requirements. Often a simple revision to a standard compo- nent is all that is required, allowing us to keep your costs at a minimum. Some Models Are Listed by the Canadian Standards Association Dimensions are provided throughout this catalog in inches millimeters . File No. LR18948 Panel Mount, Single Phase 120 and 240 Volt Adjustable Shaft 100 and 200 Series Input Output 171, 201 Constant Constant 221-B, 291 Current Impedance Net Wt. Part No. Volts Hertz Volts Load Load Lbs. Max. Max. Max. Max. Amps. kVA Amps. kVA 50/60 0-120 1.75 0.21 2.2 0 .26 171 120 2 60 0-132 1.75 0.23 50/60 0-120 2.0 0.24 2.5 0.30 201 120 2 60 0-132 2.0 0.26 50/60 0-120 2.50 0.30 3.2 0.38 221-B 120 2.5 60 0-132 2.50 0.30 50/60 0-120 3.0 0.36 3.5 0.42 291 120 2.5 Type A 60 0-132 3.0 0.40 171, 201 1.88 (47.6) 50/60 0-240 0.8 0.19 1.0 0.24 252 240 2.5 221-B, 252 2.12 (54.0) 60 0-264 0.8 0.21 291 2.31 (58.7) 500 Series Output Input Constant Constant Current Impedance Net Wt. Part No. Volts Hertz Volts Load Load Lbs. Max. Max. Max. Max. Amps. kVA Amps. kVA 0-120 5.0 0.60 7 .0 0.84 50/60 511 120 4.25 0-140 5.0 0.70 Adjustable Shaft 501C Series Input Output Constant Constant Current Impedance Net Wt. Hertz Part No. Volts Volts Load Load Lbs. Max. Max. Max. Max. Amps. kVA Amps. kVA 0-120 5.0 0.60 7 .0 0.84 50/60 501C 120 5.25 0-140 5.0 0.70 Variable Transformers www.stacoenergy.com