Schaffner Load reactors

Load reactors

Efficient way to reduce the high voltage dv/dt

Schaffner load reactors work on the AC output side of frequency converters or other sensitive equipment in series to the electrical consumer.

Load reactors, also known as output reactors or dv/dt reactors, essentially protect the load, normally an electrical motor. It is an efficient way to reduce the high voltage dv/dt caused by the power switching semiconductors within the drive converter. The protection of motor insulation from premature aging and destruction results in a significantly increased life time of all motor drive systems.


  • Phases: 1 and 3
  • Current range: up to 5 kA
  • Short circuit current withstand: up to 50 kA
  • Voltage range: up to 36 kV
  • Fundamental frequency: up to 1 kHz
  • Switching frequency: up to 20 kHz
  • Insulation classes: 180/200/220
  • Protection class: up to IP 67 and NEMA 6/6P
  • Cooling methods: AN, AF, WD