Low Temperature Rise Transformers

Hevi-Duty 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 operating losses than conventional 150° rise units. Reduction in temperature rise increases reliability.

The 35oC thermal reserve on 115°C rise units and 70°C reserve on 80°C rise units definitely mean lower operating costs. The extra benefit is being able to operate either of these transformers as a 150°C rise unit and have an overload capability of 15-30% without compromising normal life expectancy.

Low temperature rise transformers are designed for any critical 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 fully coordinated class 220°C insulation system.

Accessories and Optional Design Styles

• Wall mounting brackets (500 lbs maximum)
• Weather Shields (UL-3R)
• Stainless Steel Enclosures
• Totally enclosed non-ventilated designs (TENV) (Non UL)
• Open core and coil designs (UR) (Non CSA)
• Copper Wound designs
• Compliant to NEMA TP-1 standards
  

PDF Files

	Low Temperature Rise Transformers Specifications
	Operations & Maintenance Recommendations

Single Phase - 80°C Rise

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

Group B: 600 Volt Primary, 120/240 Secondary, 60 Hz

Three Phase - 80°C Rise

Group A: 480 D Primary, 208Y/120 Secondary, 60 Hz

Group B: 480 D Primary, 240 D Secondary with reduced capacity Center Tap, 80°C Rise

Single Phase - 115°C Rise

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

Group B: 600 Volt Primary, 120/240 Secondary, 60 Hz

Three Phase - 115°C Rise

Group A: 480 D Primary, 208Y/120 Secondary, 60 Hz