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

PCTI's Solid State Frequency Converters

PCTI can provide the frequency converters you need for any commercial, industrial or military application including 400Hz frequency converters 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. We are a regular manufacturer of static frequency converters, solid state frequency converters, 400Hz frequency converters, and custom frequency converters.

All Frequency Converters are Equipped with DSP

All of PCTI's solid state 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 frequency converters, thus increasing reliability by reducing control components.

Custom Frequency Converters Designed for You

PCTI's custom 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. For more information, contact PCTI about our solid state frequency converters for more details. If you need help in specifying your frequency converter, request a quote or download our frequency converter brochure.

Following are our standard specifications.

Contact us for options not listed here or for assistance regarding your particular application.

Voltage: +10%
• Single phase: 110, 115, 120, 130, 200, 208, 230
• Three phase: 208, 220, 230, 380, 415, 440, 460, 480, 575
Frequency: 50/60Hz
Power factor: better than 0.98 lagging from 10% to full load

• 36V
• 115/200V
• 208/120V
• 400Hz
• 50Hz
• 60Hz
Power ratings:
• 15KVA to 320KVA
• 1% independent phase regulation from combined no load to full load at rated input voltage change
Control technology:
• Digitally synthesized pulse width modulation
Transient response:
• 40ms for 50/60Hz
• 500ms for 400Hz
• 90% load change on any phase or combination of phases
Wave shape:
• Sinewave
Crest factor:
• 1.41 + 0.1
• Less than 2% THD (1% on any single frequency)
• Less than 4% for non-linear loads
Current limit:
• 110% of load
Power factor:
• 0.8 lead to 0.8 lag
• Continuous zero lead to zero lag at full-rated output without risk to unit
Overload capacity:
• 110% for 1 hour
• 125% for 10 minutes
• 150% for 2 minutes
• 200% for 20 seconds (optional)
• 300% for 6 seconds (optional)

• Pure sinewave
• Lightest weight in industry
• High efficiency for low operating costs (92% or better)
• Automatic line drop compensation

NEMA/IP enclosure ratings:
• NEMA 12 (IP20)
• NEMA 3R (IP54)
• NEMA 4 (IP55)
• NEMA 4X (IP56)
• Other ratings available upon request
• Forced air
• Up to 10,000ft. without derating
Operating temperature:
• 0°C - 50°C
Storage temperature:
• -40°C - 65°C
• Up to 98% non-condensing
Acoustical noise:
• 65BA max at 1 meter

• Input short circuit via circuit breaker with enclosure door interlock
• Input phase loss
• Phase rotation
• Overvoltage shutdown
• Undervoltage shutdown
• Overcurrent shutdown
• Overtemperature shutdown
• Load imbalance (greater than 25%) shutdown

Computer interface:
• Ethernet/IP
• Modbus TCP
• CANbus,
• IEEE 488.2 / GPIB
• RS232
• RS485
• Start/stop
• Reset
• Fault
• Inhibit
• Current adjust
• Voltage adjust
• Fault indication (UV, OV, OC, other)
Analog signals:
• 4mA - 20mA
• 0V - 5V
• 0V - 10V

• Power on indicator
• Run indicator
• Voltage trim adjust +/- 10%
• Start pushbutton
• Stop/reset pushbutton
• Fault indicator

• Single phase or three phase output voltage
• Single phase or three phase output amperage
• Undervoltage indicator
• Overvoltage indicator
• Overcurrent indicator
• Summary fault indicators
• TCP/IP/Ethernet interface
• Internal communication ports - USB, RJ45 (Ethernet)
• External communication ports - USB, RJ45 (Ethernet)
• Data logging: up to 64GB storage for event log/diagnostics

• MIL-STD-704F
• UL 1012
• CE compliant

• Increased performance
• One programmable chip with the functionality of conventional control components
• SCR preregulator to achieve high efficiency, low ripple, precise regulation, and low output noise
• Coarse and fine adjustments are available for both current and voltage
• Event and data logging to continuously monitor equipment operating status as well as internal control parameters

• Input cables
• Output cables with plug
• Parallel & load sharing
• E&F interlock status indicator
• 28V bypass mode indicator
• 12- or 18-pulse input rectification for low input current
• Push to test indicators
• 28.5VDC output (specify amps or power rating)
• Elapsed time meter
• Mobile options (casters, pneumatic tires, towable, trailer- or rack-mounted, etc.)