Static frequency converters — 50 Hz to 60 Hz and 400 Hz
Run 60 Hz equipment on a 50 Hz supply — or generate a clean 400 Hz for aviation ground power — with no rotating parts and no maintenance schedule.
- Capacity
- 1 kVA – 100 kVA
- Input
- 1φ 230 V or 3φ 415 V, 50 Hz, ±15%
- Output frequency
- 50 / 60 / 400 Hz, ±0.01% (selectable)
- Output voltage
- 110 / 120 / 200 / 220 / 230 / 380 / 400 / 415 / 480 V
More views of the Static Frequency Converter
Detail 
Terminations 
Installed on site
By rating and configuration
Each of these is a distinct build, not a filter on one page.
400 Hz Frequency Converter
Ground power for aircraft servicing and aerospace test benches. 115/200 V three-phase at 400 Hz, held to ±0.01%, with the voltage regulation and transient response that avionics testing demands.
View specs 1 – 100 kVA50 Hz to 60 Hz Converter
The commonest requirement we build for: an imported machine expecting 60 Hz at 220 V or 480 V, sitting on an Indian 50 Hz 415 V connection. One cabinet handles both the frequency and the voltage.
View specsAnd when it’s the right answer
A static frequency converter rectifies the incoming supply to DC and re-synthesises AC at whatever frequency and voltage you specify. There is no motor-generator set, so there is nothing to align, lubricate or replace, and the output frequency is crystal-stable rather than dependent on a shaft speed.
Three situations account for most of what we build. Imported machinery rated for 60 Hz, 220 V or 480 V arriving on an Indian 50 Hz, 415 V supply. Export manufacturers who need to factory-test equipment on the destination country’s supply before shipping. And 400 Hz aviation ground power for hangars and MRO facilities.
Output voltage and frequency are both configurable, so the converter also handles the voltage translation — you do not need a separate transformer downstream.
No rotating parts, roughly 90% efficient against 70–80%, far quieter, a fraction of the footprint, and no bearing or alignment maintenance.
A VFD drives one motor with a PWM output that is not a clean sine wave. An SFC produces a filtered sine suitable for any load, including electronics and control gear.
Where these get installed
- Imported 60 Hz machinery on Indian supply
- Export equipment factory acceptance testing
- 400 Hz aviation ground power
- Marine and shipyard shore supply
- Defence and aerospace test benches
- Semiconductor and precision equipment
Full specification
Typical values for the standard build. Every unit is configured to order — the figures on your general arrangement drawing are the ones that apply.
| Capacity | 1 kVA – 100 kVA |
|---|---|
| Input | 1φ 230 V or 3φ 415 V, 50 Hz, ±15% |
| Output frequency | 50 / 60 / 400 Hz, ±0.01% (selectable) |
| Output voltage | 110 / 120 / 200 / 220 / 230 / 380 / 400 / 415 / 480 V |
| Voltage regulation | ±1% |
| Output THD | < 3% linear load |
| Efficiency | Up to 90% |
| Overload | 125% for 1 min · 150% for 10 s |
| Isolation | Galvanic, via output transformer |
| Cooling | Forced air |
| Enclosure | Floor standing · portable to order |
Sectors that buy this
Defence & Aerospace
400 Hz ground power, frequency conversion for test benches, and supplies specified against MIL-STD-704 rather than a catalogue.
CNC & Machine Shops
A CNC controller that resets mid-cycle scraps the job and can crash the tool. On MIDC feeders that is a voltage problem far more often than an outage problem.
Pharmaceutical & Life Sciences
In a GMP environment a power event is not only a downtime cost — it is a deviation, an investigation and potentially a lost batch.
Static Frequency Converter — questions we get asked
Anything not covered here, call us — most of it is faster to answer on the phone.
Can I run a 60 Hz machine directly on a 50 Hz supply?
Usually not safely. Motors run 17% slower and the reduced reactance at 50 Hz raises magnetising current, which overheats the windings. Timers and control gear referenced to line frequency drift. Transformers can saturate. The cheap experiment tends to end with a rewind.
Why is 400 Hz used in aviation?
At 400 Hz a transformer or motor of the same rating needs roughly an eighth of the magnetic core mass it would need at 50 Hz. On an aircraft that weight saving is decisive, so aircraft systems standardised on it — and ground support has to match.
Does the converter also change the voltage?
Yes. Output voltage and frequency are set independently, so a single unit takes 415 V 50 Hz in and gives, say, 480 V 60 Hz or 200 V 400 Hz out. No separate transformer is needed.
Where we supply and attend
Static Frequency Converter units are built at our Pune works and delivered, installed and commissioned across the city and the industrial belt around it.
Outside these areas we contract individually against distance, and we will tell you honestly if the response time you need is not one we can hold to. All areas served
After it’s installed
We service what we build, and what everyone else builds too.