400Hz Static Frequency Converter SFC

PX Electronics 400Hz Static Frequency Converter is a compact, whisper-quiet power system built for aviation-grade performance and durability.

PXe 400Hz Static Frequency Converter, Why It Works:

Seamless frequency conversion: Transforms 50Hz or 60Hz utility power into 400Hz. Ideal for aircraft ground power and avionics testing.
Advanced, rugged design: Features an IGBT-driven rectifier and inverter with built-in isolation transformer for clean, reliable output.
Ultra-quiet and low maintenance: Robust construction ensures low acoustic and electrical noise—perfect for noise-sensitive environments.
User-friendly controls: Panel provides real-time AC parameters—voltage, current, frequency, and power—clearly displayed.
Flexible options: Available in 4kVA to 50kVA models, with adjustable voltage and frequency, remote control, RS485, and volt-free contact capabilities.
Certified for critical use: Meets aviation and military standards like DFS400, MIL-STD-704F, ISO 6858, and more, ensuring safety and compatibility.

Perfect For: Avionics labs, aircraft ground power units, military test environments, production and proving stations, MRO hangars, and specialised R&D facilities.

Click here for datasheet Click here for sample specification

PXe offers new standards in 400Hz generation, supporting the legacy Failsafe SFC units. The new PXe-60 series frequency converters are ultra compact, near silent in operation and very low maintenance. They have a large easy-to-read digital display panel which displays all ac parameters including voltage, current, frequency and power. An extensive options list allows each converter to be customised to specific requirements.

PX’s latest converter topology provides a robust, high quality 400Hz output, able to handle even the most non-linear and complex types of load. It is capable of working in continuous duty with a long service life and at very high efficiency levels. The new design benefits from extremely low levels of both acoustic and electrical noise.

The PXe-60 series includes 9 models ranging from 4KVA to 50KVA. All share the same comprehensive digital display panel, but with PX’s trade-mark simplicity of operation.

PXe-60 models may be ordered with variable output voltage and/or frequency. This allows the User to replicate the real ‘in the air’ aircraft supply quality when testing equipment. Output voltage and frequency are both continuously variable via front panel knobs.

A remote control panel is available allowing the converter to be monitored and controlled from up to 200m away. PXe-60 converters may also be fitted with an RS485 data bus, permitting all the performance parameters of the converter to be observed remotely. And to complete these extensive remote monitoring facilities, PXe-60s can also be ordered with volt-free contacts for all major status conditions.

Applications:

Avionics/aircraft equipment development and R&D
Avionics Labs and MROs
Production line and proving facilities
Hangar plant room
Accredited Test Houses
Submersibles
Special Applications and bespoke designs
For external GPU see PXe-60

TECHNICAL SPECIFICATION – 1kVA to 50kVA options available

Input
Voltage	400V or 440V +/-10%, 3ph
Frequency	50Hz or 60Hz +/- 6%
Power factor	>0.98 @ full load
Susceptibility	EN 61000-4-4, 5
Output
Voltage	115/200V or 120/208V, 3ph
Voltage regulation steady-state	+/- 2%
Voltage regulation dynamic	+/- 5% @ 0-100% step-load
Frequency	400Hz +/- 0.1% under all conditions
THDv	Better than 3% @ linear load
Overall quality	Better than MIL-STD704E, DFS400
Waveform	Pure sinusoid
Phase angle accuracy	Better than 1%
Overload capability	110% @ 30 mins, 200% @ 5 secs, 300% @ 1 sec
Permissible load power factor	0.6 leading to 0.6 lagging
Permissible phase un-balance	70%
Secondary 28VDC output	70 amps continuous (optional)
Protection
Input supply	MCB, phase loss detection, over & under voltage
Output	Over-current, over-temperature, phase loss detection, over & under voltage, short-circuit (any phase)
Display panel
Parameters displayed:	Output voltage (ph-ph + ph-N), output current, power, frequency, power factor
Accuracy	Better than class 0.25 IEC 60688
LEDs	Input present, Converter healthy, Over-temperature, Overload, General fault
Environment
Ambient temperature range	-10 to 50 deg C
Electrical noise	EN 55022, IEC1000-4
Cabinet protection	IP31
Acoustic noise	<50dB(A) @ 1m
Construction	Mild steel, zinc plated, painted RAL7032 grey & white
Castors or feet	4KVA has rubber feet and lifting handles, others have . 80mm castors with front brakes. A/Vs or feet optional
Cooling	Variable speed turbine, air intake in base, exhaust at rear
CE	CE marked
Connectors
Connector options	Hard-wire terminals, EN60309, MIL-STD, or Client choice
Remote Facilities
Remote control option	Remote control panel, electrically isolated from the converter, self-powered, On/Off + 5 status indications. Operational up to . 200m from the converter
Remote monitoring	RS485 2-wire/0V, ½ duplex ¼ unit load, MODBUS RTU 16-bit CRC 4800 or 9600 baud
Volt-free contacts (C/O)	Input supply present, output on/off, over-temperature, overload, fault. Contacts isolated from converter
Connector type remote	25-way ‘D’ socket
Options
Variable output voltage	Via front panel knob, nominal voltage +/- 15%
Variable output frequency	Via front panel knob, 400Hz +/- 10%
Special input voltages	220V & 480V (3ph)
Special output voltages	67/115V, 3ph, 400Hz
Military EMC standard:	MIL-STD 461, MIL-STD704, STANAG 1008
Standards
EN61000-6-4, EN62040-1-1, EN55032, EN55035, EN IEC61000-3-2,VEN 6100-3-3GB50054-95, GB 50150-1991, GB 50150-2006, GB 50171-1992, GB/T 16935.5-2008, GB/T16935.4-2011,