BL+ Series

BL PLUS High Power Frequency Converter


Behlman's BL-PLUS Series High Power AC Source/ Frequency Converter provide the performance of a linear with all the benefits of a switching amplifier. Instead of relying on large, noisy motor generators for AC power, today's testing facilities are switching to quiet, compact Behlman AC Power frequency converters.

Behlman's Solid-State BL-PLUS offers greater energy efficiency, reduced downtime, and a significantly smaller footprint. They're ideal for avionics, airborne and shipboard equipment as well as international products testing. The BL-PLUS even comes with an optional computer control for Automatic Test Equipment (ATE) application. It's adjustable voltage and frequency provides maximum flexibility.

Combined with The efficiency of the BL-PLUS Series and the savings in converting from a motor generator really add up.

BL PLUS High Power Frequency Converter
Single Phase AC Power Supply
Model Power (VA) Output Volts VAC (RMS) Output Current (Amps) Frequency (Hz) Input Volts 1Ø VAC Dimensions Description
BL+25 25000 -1: 0-132, L-N, 1ø , -2: 0-264, L-N, 1ø , -3: 0-305, L-N, 1ø -1: 190 , -2: 95 , -3: 82 45-500, WF-350-800 -1: 49”H x 31.6”D x 22.1W , -2,-3: 49”H x 31.6”D x 22.1W Fixed or Variable voltage and frequency
Three Phase AC Power Supply
Model Power (VA) Output Volts VAC (RMS) Output Current (Amps) Frequency (Hz) Input Voltage (VAC) Dimensions Description
BL+30 30000 -1: 0-132, L-N, 3ø , -2: 0-264, L-N, 3ø -3: 0-305, L-N, 3ø -1: 76 /ø @ 0-132 , -2: 38 /ø @ 0-264 V , -3: 33 /ø @ 0-305 V 45-500 WF-350-800 -1: 49”H x 31.6”D x 22.1W , -2,-3: 59”H x 31.6”D x 22.1W Fixed or Variable voltage and frequency
  • Precise Adjustable Power: Variable amplitude & frequency with performance quality of a linear and the benefit of switching technology with option "M"
  • Low Input Current Distortion: Multi-pulsed input transformer and soft start circuitry assures that it will not adversely affect other equipment on the power line
  • Line Drop Compensation for Remote Regulation

Behlman’s BL Plus solid state AC power frequency converter offers greater efficiency, reduced downtime, and a significantly smaller footprint and easier installation than the motor generator it is designed to replace. The BL Plus has all the quality features you expect from Behlman; fully adjustable voltage and frequency, low output THD, high efficiency plus excellent line and load regulation. There’s also a unique overload protection system that folds-back voltage to maintain rated current without output waveform distortion. Optional analog remote control is available with the standard controller or you can opt for the Programmable Controller with RS232 interface standard or optional IEEE-488.  Small size, easy installation, quiet operation and high efficiency make the BL Plus ideal for industrial product testing, precision avionic test, power conversion, ATE, bulk power and motor generator replacement.


Rugged, reliable and easy to use for a variety of applications:

  • Avionics and aircraft product testing
  • Aircraft simulator power
  • Industrial product testing
  • Power conversion
  • Facility Power


Multi-pulse input transformer for low input current THD


            C1: 120/208, 57-63 Hz                C6: 230/400, 47-63 Hz

            C2: 220/380, 47-53 Hz                C7: 240/415, 47-53 Hz

            C3: 277/480, 57-63 Hz                  X:  Custom input

            C4: 200 delta, 57-63 Hz



Power:                             25-30 KVA

Voltage: -XXX:                Fixed at any L-N voltage

             -1:                 0-132 VAC, L-N, 3 phase

             -2:                 0-264 VAC, L-N, 3 phase

             -3:                 0-305 VAC, L-N, 3 phase

Accuracy:                 0.25% of Full Scale +/- 1 V

Frequency:                     45-500 Hz

        -XXX:                 Fixed at any frequency from 45-500Hz

Accuracy:                 +/- 0.1 Hz


             -1:                76 - 190 Amps/phase @ 0-132 V             

             -2:                38 - 152 Amps/phase @ 0-264 V

             -3:                33 - 66 Amps/phase @ 0-305 V

Accuracy:                 2% of Full Scale +/- 1 A

Peak current:                 Repetitive peak not to exceed 250 amps

Power Factor:                100% of rated output into any power factor load

Distortion:                      3.0% THD typical, measured at full current 115 Volts, 60 Hz, into a linear load

Line Regulation:            +/- 0.5% for +/- 10% line change

Load Regulation:           +/- 0.7%, no load to full load

Efficiency:                       80% typical

Line drop compensation:         +10% adjustment range to compensate for output line losses



Input:                               Electronic circuit breaker

Constant Current:         Overload automatically causes voltage fold-back to provide maximum current without distorting output waveform

Short Circuit:                  Short-circuit overload electronically latches output open to protect load... power restored by recycling circuit breaker

Thermal:                          Internal temperature sensor prevents heat damage by turning output off…output will turn on when reaching safe temperature



Power On/Off:                Push to start…push to stop

Line drop compensation:         Three recessed potentiometers for 10% adjustment phase A, B, C

For PDF copy of complete specification, please select model:
▶ BL PLUS High Power Frequency Converter


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