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6 Ventilated Distribution Transformers

Low Temperature Rise

SolaHD low temperature rise transformers feature a 220°C insulation system and temperature rise of only 80°C or 115°C under full nameplate load. The result is 13-21% lower operat- ing losses than conventional 150°C rise units. Reduction in temperature rise increases reliability.The 35°C thermal reserve on 115°C rise units and 70°C reserve on 80°C rise units definitely mean higher reliability. The extra benefit is being able to operate either of these transformers as a 150°C rise unit and have a short term overload capacity of 15-30% without compromising normal life expectancy (See Figure 2).Low temperature rise transformers are designed for any criti-cal application requiring extra overload capability, lower than average total losses and/or cooler operating temperatures. All are available with either a 115°C or 80°C thermal rise and a Class 220°C insulation system. Accessories and Optional Design Styles • Wall mounting brackets (500 lbs maximum) (Item WB1C)• Weather Shields (UL-3R)* • Stainless Steel Enclosures • Totally enclosed non-ventilated designs (TENV) (Non UL) • Open core and coil designs (UL Recognized)• Copper Wound designs• Compliant to NEMA TP-1 standards

Listed
E25872

* Not all optional designs are UL listed. Contact Technical Services. Figure 2

Selection Tables: Low Temperature Rise, Single Phase, 80

o

C Rise

Group 1: 240 x 480 Volt Primary, 120/240 Secondary, 60 Hz, 80

o

C Rise

Listed
E25872 kVACatalog Number 80°C RiseNEMA 3R Weather Shield*Height (inch)Width (inch)Depth (inch)Approx. Ship Weight (lbs)DesignStyle**Elec Conn**Primary AmpsSecondary Amps 15 ES5HB15SWS-15 2816162651162.5/31.3125/62.5 25 ES5HB25SWS-17 31181834011104/52.1208/104 37.5 ES5HB37SWS-17 31181842511156/78313/156 50 ES5HB50SWS-09 44232165511208/104416/208 75 ES5HB75SWS-09 44232175011313/156625/313 100 ES5HB100SWS-16 46262498011417/208833/417

Notes: * Weather shields (set of two) must be ordered separately.**Design Style and Electrical Connections can be found on pages 204-205.

Visit our website at www.solaheviduty.com or contact

190

Technical Services at (800) 377-4384 with any questions.