Frequency Converters from 3.5KVA to 2MVA, 400Hz, 50Hz, 60Hz


PCTI can provide the frequency converter you need for any commercial, industrial or military application including 400Hz for aircraft ground support and other combinations of input/output frequencies (50Hz, 60Hz, 400Hz, etc.). Our frequency converters are available as mobile, towable, bridgemount or freestanding units to standards including MIL-STD-704F, MIL-STD-810, MIL-STD-461 and others. All PCTI frequency converters are equipped with a sophisticated control system utilizing digital signal processor (DSP) control based on IGBT PWM technology. This superior next-generation control allows us to provide a single control board solution for the frequency converter, thus increasing reliability by reducing control components. For more information, contact PCTI about frequency converters for more details. For representative project profiles, click the button at top right. If you need help in specifying your frequency converter, request a quote or download our frequency converter brochure.

Frequency Converter Standard Features  400Hz, 50Hz, 60Hz


PCTI’s frequency converters include a 6 pulse input rectifier, IGBT based on a DSP PWM technology (digital signal processor, pulse width modulated). A variety of computer interfaces are available to meet all of your inverter programming and control requirements.

Input Service: Any 3 Phase AC Input
AC Input Frequency: 60Hz or 50Hz typical, 400Hz, contact the factory for others
Efficiency: 85% at full load
Power Factor: 0.8 to unity at full load and nominal input

Protection: Input Circuit Breaker

Power Range: 10KVA to 2MVA
Output Service: Any voltage
AC Output Frequency: 400Hz, 50Hz, 60Hz or others on request
Frequency Regulation: + 0.05%
Regulation: 1% independent phase regulation for combined no load to full load at rated input voltage change Control Technology: Digitally synthesized Pulse Width Modulation
Wave Shape: Pure Sinewave
Crest Factor: 1.41 + 0.1%
Transient Response: 500 ms for a 90% load change on any phase or combination of phases
Current Limit: 110% of load
THD (Total Harmonic Distortion): less than 2% THD, 1% on any single frequency, less than 4% for non-linear loads
Power Factor: 0.9 lead to 0.7 lag. Continuous zero lead to zero lag at full rated output without damage to the unit.
Overload capacity: 125% for 10 minutes, 150% for 2 minutes, 200% for 20 seconds and 300% for 6 seconds
Front Panel Devices
Power ON Indicator
Run indicator
Undervoltage indicator
Overvoltage indicator
Voltage trim adjust from 45% to 105%
Start pushbutton
Stop/Reset pushbutton
Fault indicator
Output Voltmeter w/3 Phase selector switch
Output Ammeter w/3 Phase selector switch
Input Circuit Breaker
Output Circuit Breaker
Output Contactor
E&F Interlock with bypass feature
Overcurrent/Overload will withstand output short circuit cleared by internal circuitry
Output Underfrequency
Input to output transformer isolation
Automatic Line Drop Compensation
Automatic Input Line Monitoring
Built in Test and Protection Monitoring
MIL-STD-704F Compliant
MIL-STD-461 Compliant for EMI/RFI
Standard conformance to IEC, NEMA, NEC, IEEE and other Mil-Spec
Indoor or outdoor enclosures
Computer Interface/Remote Capability
Analog Signals: 4-20mA, 0-5V, 0-10V or
Computer Interface: ethernet, profibus, Modbus, CANbus, IEEE 488.2/GPIB, RS232, RS485
Functions: Start/Stop, Reset, Fault, Inhibit, Current Adjust, Voltage Adjust, Fault Indication (UV, OV, OC, other)
NEMA Enclosure Types: 1, 3R, 12, 4, 4X
Enclosure types: mobile, towable, bridgemount or freestanding
Operating Temperature: -5°C to 40°C
Storage Temperature: -10°C to 65°C
Humidity: up to 98% non condensing at 40°C
Optional Features
Power Factor Correction
Audible Alarm
Frequency Meter
Elapsed Time Meter
Mobile unit (pneumatic tires or casters depending on rating)
Dual output
Multiple selectable input voltages
Emergency Mushroom OFF switch
Electrical door interlock with bypass
Cable racks for input and/or output cables
Aircraft cables and plugs
400Hz Distribution Panels