ABB CMF Motor Fuses - IEC Standard 3.6kV-12kV

ABB Power ProductsABB MV HV Medium - High Voltage Fuses

Indoor Fuses for MV Medium Voltage Cable Networks

ABB CMF Motor Fuses - IEC Standard 3.6kV-12kV


ABB CMF Motor Fuses are specially designed for medium voltage (MV) or high voltage (HV) motor circuit applications from 3.3kV (3.6kV up to 11kV (12kV). Motor fuses are tested to IEC Publication 60282-1 (IEC 282-1) and Publication 60644 (IEC 644). IEC 60644 applies to fuse links used with motors that are started direct-on-line in alternating current (AC) systems. High voltage fuses used in motor circuits must be able to withstand, without deterioration, the repeated surges associated with motor starting.

Motor fuse dimensions are in accordance with DIN 43625 and IEC 60282-1.

Although a motor fuse is normally run at a stationary current, which is much lower than the fuse rated current, the low-loss characteristics of ABB CMF Motor Fuses make them especially suitable in compact contactor compartments.

ABB Indoor Fuses - CMF IEC Indoor Motor Fuse

ABB CMF Indoor Motor Fuse Ratings

  • Rated fuse voltage 3.3kV/3.6kV to 11kV/12kV
  • Normal fuse current 63Amp - 315Amp


ABB CMF IEC Indoor Motor Fuse Features

  • Specially designed for motor circuit protection
  • Tested according to IEC 60644 which guarantees excellent ability to withstand repeated motor starting conditions
  • ABB CMF have high current rating within single body dimensions
  • Low minimum breaking current
  • Low power losses, specially suitable in compact contactor compartments
  • High breaking capacity
  • Available with BS tags
  • ABB CMF fuses have a high current limitation
  • Versions CMF-TCU equipped with Temperature Control Unit, which protects against high temperature in enclosed compartments
  • Equipped with medium type striker, which is activated immediately when the fuse-elements melt
  • Type tested acc. to IEC 60282-1 and IEC 60644
  • Dimensions acc. to IEC 60282-1 and DIN 43625

ABB CMF Indoor Fusse

ABB CMF IEC Indoor Motor Fuse - Ratings & Dimensions

Rated Voltage

Rated Current Fuse Length Fuse Dia. K-Factor

Max Tested Breaking Current

Min Breaking Current Fuse Resis-tance at 20°C  Power Loss At Rated Current
Un In e D K I1 I3 R0 Pn
3.6kV 100A 292mm 65mm 0.75 50kA 275A 3.2mΩ 49W
160A 292mm 65mm 0.7 50kA 400A 1.92mΩ 75W
200A 292mm 87mm 0.7 50kA 500A 1.40mΩ 75W
250A 292mm 87mm 0.6 50kA 760A 0.97mΩ 90W
315A 292mm 87mm 0.6 50kA 900A 0.81mΩ 122W
7.2kV 63A 442mm 65mm 0.75 50kA 175A 8.50Ω  45W
100A 442mm 65mm 0.75 50kA 275A 4.86Ω   67W
160A 442mm 65mm 0.7 50kA 400A 2.92Ω  119W
200A 442mm 87mm 0.7 50kA 500A 2.12Ω  118W
250A 442mm 87mm 0.6 50kA 800A 1.48Ω  142W
315A 442mm 87mm 0.6 50kA 950A 1.23Ω  193W
12kV 63A 442mm 65mm 0.75 50kA 190A 13.52Ω  77W
100A 442mm 87mm 0.75 50kA 275A 6.62Ω  103W
160A 442mm 87mm 0.7 50kA 480A 3.98Ω  155W
200A 442mm 87mm 0.7 50kA 560A 2.73Ω  173W


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ABB CMF Motor Fuses -  IEC Standard 3.6kV-12kV