Skip to main content

ReliaGear XFMR K-Factor

ABB Transformers - Low Voltage Dry Type

ABB’s type QL K-Factor transformers are designed to withstand the additional heating that accompanies the presence of harmonics in electrical systems. K-Factor transformers are designed not to eliminate harmonics, but to withstand their negative effects. They are available with aluminum or copper windings and in all three temperature rise ratings. Type QL transformers meet DOE 2016 efficiency standards.


  • Built on strong material to extend its durability
  • Designed to help reduce operating costs
  • Easy access for installation and service
  • K-Factor rated for harmonic generated non-linear loads 


  • Full-width copper electrostatic shielding standard
  • Unique core and coil design using grain-oriented silicon steel
  • Core and coil assemblies mounted on rubber isolation pads
  • Single piece front/back
  • Outward-facing feet 
  • Lifting eyes provided in the top clamp
  • Lug kit included with most units up through 150kVA
  • Copper ground bar kit included with most units up through 150kVA
  • Copper ground strap

Technical specifications

  • 15 – 300 kVA
  • Effective coupling capacitance 30 pF
  • Common mode noise attenuation 120 dB
  • Normal mode noise attenuation 30 dB
  • NEMA 1 and/or 2 drip-proof enclosure
  • Weather shield available for field conversion to NEMA 3R
  • NEMA 3R stainless steel (Type 316) available through 150 kVA

Certifications and standards

  • DOE Standards
  • Seismic qualified


- Welders
- Induction heating
- HID lighting
- Fluorescent lighting

- Telecommunications equipment
- Classroom facilities
- Healthcare facilities
- Production lines
- SCR variable speed drives

- Office buildings
- Data processing equipment
- Adjustable speed drives
- Computer installations
- Instrumentation