LV Iron Core Line & Load Reactors

Line and load reactors are generally serial-connected to the input and/or output terminals of three phase equipment such as motor speed controllers, inverters and UPS systems. This equipment makes use of semiconductor switches such as IGBTs, thyristors, and diodes and thus creates harmonic distortion and high switching over-voltages (dv/dt). Use of such equipment has become more widespread as the technology advances. However, the negative effects of these types of equipment should not be overlooked.

By using line and load reactors, the adverse effects of using such equipment can be decreased in the following ways:

  • Limited starting current
  • Reduced motor noise
  • Reduced harmonic distortion
  • Reduced motor heating
  • Reduced switching over-voltages
  • Easier selection of fuses as per nominal motor current

These reactors are designed to provide a 4% voltage drop. Different voltage drop values can be provided on demand.

All Hilkar line&load reactors are custom designed for diverse applications to provide the most efficient design at the most economical prices. Consideration of the voltage, current, inductance, type of application, harmonics, interharmonics, size, transient events such as switchings, and required loss characteristics are always taken into account. All routine tests are performed in accordance with IEC 60076-6 or other standards depending on customer request. Type test reports are available on request and all results are submitted to customer. Basic testing programs include some or all of the following:

  • Routine Tests (Inductance, Resistance, One Minute AC Insulation Voltage Withstand Test and Impulse Voltage Withstand Test)
  • Short Circuit Withstand Test
  • Temperature Rise Test
  • Sound Level Test
  • Seismic Test




  • Designed and tested according to applicable IEC and IEEE standards
  • High quality factor (Q)
  • High thermal capacity
  • High mechanical strength to withstand high short-circuit forces
  • Compact design, dimensions can be adjusted according to customer's specific needs
  • Maintenance-free design
  • Aluminum, hot dip galvanized steel or concrete support stands on demand
  • Elevation stands on demand
  • Enclosures on demand




Technical Specification
Voltage 208-690V
Rated Current In, 50-60 Hz*
Overload Ratings Imax = 2I1 for 12s, 1.5I1 for 60s, 1.1In continuous
Linear Current Ilin = 1.6I1
Impedance Levels (Z) 1.5%, 2%, 3%, 4%, and 5%
Type Iron Core
Altitude Up to 1000m*
Installation Indoor
Insulation Class F (155°C)
Winding Material Aluminum or Copper
Protection degree IP00 (indoor)
Temperature range -40°C to 55°C
Thermostat 125°C
Insulation Level 3kV AC for 1 min
Cooling Air Natural (AN)
Options Taps with DIN or NEMA terminal configuration

*Consult factory for higher values.