Frequency converters are required in situations where equipment operates at a frequency other than the standard 50Hz utility supply.
Typically this might be the following types of equipment:
- 60hz American electrical equipment
- Industrial process equipment
- Military electrical equipment
- Aircraft electrical systems
- Test labs
- University labs
Siel Energy Systems offers a range of 60Hz and 400Hz frequency converters:
- The MFC 400 converts a 50 or 60Hz input to a 400Hz output,
- The SAFEPOWER TM or TT FC converts a 50 or 60Hz input to either a 60 or 50Hz output.

MFC400 Frequency Converters
In the case of the MFC400 series, a 50 or 60Hz input supply is converted to a 400Hz output supply. Double conversion technology is used, (VFI SS 111 voltage and frequency independent compliant with IEC EN 62040-3), with an integrated output transformer to ensure the galvanic isolation of the load.
The output voltage is 208 Vac three-phase (200/115V versions upon request). Power conversion topology is based on high-frequency IGBT technology and digital control.
MFC400 frequency converters are ideal for;
- Industrial processes.
- Military applications.
- Avionics workshops.
- Aircraft ground power.

SAFEPOWER Frequency Converters
SAFEPOWER FC series converts a 50 or 60Hz input to either a 60 or 50Hz output. Proven IGBT technology is combined with an OUTPUT transformer providing galvanic isolation of the load from the DC circuits and a solid point for referencing the AC output to earth.
Systems use double conversion topology (VFI-SS-111; voltage and frequency independent compliant with EN62040-3).
Field proven, SAFEPOWER FC demonstrates high levels of short circuit capability, reliability, high efficiencies, ruggedness and flexibility designed to suit individual customer requirements throughout a wide variety of applications, including;
- Industrial processes.
- Shore to ship power.
- Military applications.
- Avionics workshops.

View our range of high-quality Frequency Converters, here:

MFC 400
- Input / Output Phase Configuration Options: 3/3 Phase
- Rating: 30-125kVA
- Frequency: 50-400 Hz

SAFEPOWER TM FC
- Input / Output Phase Configuration Options: 3/1 Phase
- Rating: 20-60kVA
- Frequency: 50-60Hz – 60-50Hz

SAFEPOWER TT FC
- Input / Output Phase Configuration Options: 3/3 Phase
- Rating: 160-1000kVA
- Frequency: 50-60Hz – 60-50Hz