LSX Series – Programmable AC Power Source

Modern, Versatility & Sophisticated yet Economical

LSX Series

Fully featured, switch-mode AC Power sources. Cost effective and fully programmable for both basic frequency conversion and power line disturbance test applications.

For questions regarding the LSX Series and or custom solutions, please contact us directly


The LSX Series is a family of High Performance Switching AC Power Sources covering the power range from 1.5kVA to 6kVA (1). The product line offers both single and three phase models. Units are conservatively designed and output power ratings are based on the worst case combination of input line, output voltage, power factor, and temperature.

Great emphasis has been placed on low acoustic noise, ease of installation, and maximum power per cubic inch of rack space. Control and operational features provide a high degree of application versatility and ease of use for the test engineer. Applications range from simple, manually controlled frequency conversion (LSXM versions) to harmonic testing and sophisticated bus programmable transient simulation (LSX versions).

Power conversion within the LSX Series is achieved by high frequency pulse width modulation, resulting in cool, quiet and efficient operation.

Note 1: For requirements higher than 6kVA, see ADF Series and AFX Series.

Models Table

Model Rated Power (VA) Output Form Output Volts-Max (VRMS) Output Amps (Arms) Input Power Form Panel Height (U) Weight (Lbs./KG)
Single Phase Models
115LSX(M) 1500 132 16 3 65/29.5
120LSX(M) 2000 150/300 20/14 3 75/34
140LSX(M) 4000 135/270 32/16 3Ø* 5 120/54.5
160LSX(M) 6000 132/264 48/16 5 145/66
Three Phase Models
315LSX(M) 1500 1Ø 3Ø 132/264 132 (Vl-N) 12/6
4 per Ø
3 75/34
320LSX(M) 2000 1Ø 3Ø 150/300 150 (Vl-N) 20/12
7 per Ø
3 85/38.5
345LSX(M) 4500 1Ø 3Ø 135/270 135 (Vl-N) 36/12
12 per Ø
3Ø* 5 145/66
360LSX(M) 6000 1Ø 3Ø 132/264 132 (Vl-N) 48/16
16 per Ø
5 145/66


Model Power (VA) Form Output Volts-Max (VRMS) Output Amps (ARMS) Power Form Height (U)
Weight (Lbs./KG)
Single Phase Models
Transformer Transformer
Direct 1.5:1 2.0:1 2.5:1 Direct 1.5:1 2.0:1 2.5:1
115LSX(M)T 1500 132 198 264 330 16 10.7 8 6.4 3 80/36.4
140LSX(M)T 4000 1Ø/2Ø 135/270 202/404 270/540 338/600 32/16 21.3/10.7 16/8 12.8/6.4 8 245/111.3
160LSX(M)T 6000 1Ø/2Ø 132/264 198/396 264/528 330/600 48/16 32/10.6 24/8 19.2/6.4 8 270/122.8
Three Phase Models
Transformer Transformer
Direct 1.5:1 2.0:1 2.5:1 Direct 1.5:1 2.0:1 2.5:1
8 265/120
8 270/122.8


  • All single phase output units (Model 115LSX excepted) are operable with dual voltage ranges as listed. Three phase units are operable as single phase with dual voltage range capability or as three phase. Output voltage ranges and 1ø/3ø conversions are selected by front panel or bus commands.
  • Output voltage ranges listed are for standard units. VMAX is output voltage with nominal input and full rated load applied. Other voltage ranges are available with the output magnetics options.
  • Peak Repetitive Pulse Current.
  • Single phase input: 100, 110, 120, 208, 220 and 240 VAC +10%. Three phase input: 208,220,240,380,416 and 480 VAC +10%. (480 V input and 400 Hz input are each available as a cost option.) *Single phase version available for added cost.

LSXM Version Reduced Feature Set Summary

Output Waveforms Sine, Square, Clipped, Triangle. Arbitrary Sinewave only
Phase Angles phase B,  C Programmable Fixed: 120°, 240° or 240°, 120°
Transient Programming yes no
Programmable V,F slew rate yes yes
Programmable Settings yes yes
Measurements (scalar) yes yes
Harmonic Measurements yes no
Waveform Capture yes no
Programmable output Impedance (Prog-Z) yes no
Digital control interfaces yes yes
Embedded Web Server yes yes

Key Features

Key Features Provide Application Versatility

  • 200 Waveform Library – Arbitrary Waveform Generator
  • 15 to 1,200 Hz Operation – 5,000 Hz Bandwidth
  • Precision True-RMS metering of volts, amps, and power for displays and reporting
  • Compatible with PPSC Manager Windows Software
  • Standard LAN, USB, GPIB and RS-232 Interfaces with SCPI compatibility
  • 1 Phase/3 Phase Switch Selectable Output from front panel or bus command
  • 200 stored programs for both static and dynamic Transient Testing
  • LabVIEW for Windows®/LabWindows® drivers
  • Waveform Creation by Harmonic Synthesis
  • Metering of RMS and Peak Values
  • High Speed Digital Scope function via web browser
  • Harmonic Analysis (Voltage and Current)
  • Continuous Self Calibration (CSC)
  • Precision Voltage Programming – 0.05% with CSC engaged
  • Programmable Output Impedance (R+L) both Real-Time & RMS modes
  • Up to 0-300 Vac Direct Coupled Output (split phase)
  • Power Levels from 1.5 kVA to 6 kVA
  • Externally Referenced Meter Calibration
  • Design Provides Total Control of AC Power

Design Provides Total Control of AC Power

  • All LSX Series power source models are equipped with a full programmable Oscillator/Controller using three advanced digital signal processors (DSPs).
  • All Models include harmonics analysis and synthesis, Prog-Z and Inrush Current Measurement features.
  • Available C Option for IEC 61000-4-13 interharmonics generation.
  • Single phase power source models may be controlled to operate on either a 0-135 VAC range or a 0-270 VAC range. Three phase models are additionally switchable 3ø to 1ø output power form.
  • Total control of the output power form and the selection of either the direct output or the optional transformer output is available from the front panel or the bus.
  • All operating functions may be controlled from either the front panel or from a remote control / SCPI BUS. LabVIEW for Windows® and LabWindows® Instrument Drivers are available.

Special LSX Series Operating Features

Continuous Self Calibration:

Provides for exceptional accuracy of the AC output Voltage. When enabled, accuracy improves to ±0.1% referenced to the power source internal voltmeter.

Cycle Based Transients:

Create and execute transients that substitute a waveform in any or all phases for 1 to 1 million or more cycles. The waveform being substituted can be selected and/or modified from the waveform library.

Waveform Edit:

A full-featured editor permits modification of a stored waveform in both time and frequency domains. This method can be used to quickly create spikes, dropouts, notches and other sub-cycle wave conditions. The resulting modified waveform is stored for execution in steady-state or transient programs. Not supported on LSXM models.

Waveform Library:

Up to 200 different waveforms can be stored in the waveform library for execution as part of a steady state program or for substitution in any output phase as part of a transient test program. Memory location #1 is a non-editable high resolution sine wave. Locations 2-200 are editable and can be substituted in any output phase. Not supported on LSXM models.

Waveform Analysis:

Provides both graphic and numeric displays of the harmonic structure of a voltage or current waveform on the front panel color display or in any web browser using the LAN or USB interface. Each waveform is analyzed for its harmonic content up to the 51st harmonic. Amplitude and phase are reported to the local display. Displays numeric values as well as a graphic summary of the harmonic spectrum. Not supported on LSXM models.

Time Based Transients:

Create and execute transients that occur over a specified time segment to modify the output waveform, voltage, and frequency for any or all phases. An output trigger is provided for synchronizing external test equipment to the actual transient event.

Programmable Dynamic Output Impedance – Prog-Z:

Programmable Output Impedance provides the operator with the ability to dynamically control the output impedance of the AC Power Source. Using the output current term as conditioned feedback signal to the output voltage circuits, positive or negative impedance may be programmed. This control simulates the effects of, or compensates for high peak current, distribution, or transformer losses of up to ±10% of the output voltage. This feature creates positive, negative, or zero output impedance (Zo).

  • Compensates for line distribution or transformer losses.
  • Simulates a soft power line for product testing. Compensation range is ±10% of the output voltage.
  • Not supported on LSXM models.
Waveform Scope Capture and Synthesis:

A digital storage scope function captures voltage and current waveforms for up to three phases in real time. Display is available on the front panel LCD or with higher resolution on a web browser.  To create harmonics waveforms for immunity testing, quickly create virtually any AC waveform by building it out of harmonics. The process is as simple as keying in the magnitude and phase angle of each desired harmonic up through the 51st. Additionally, waveforms can be created by downloading from a host PC. Not supported on LSXM models.


AC Test Power:

The LSX Series Power Source is equipped with a powerful microcontroller supported by three additional digital signal processors to create a fully integrated test system. It supplies a variety of power conditions to the device under test and meters/analyzes all output performance parameters.

Frequency/Voltage Conversion:

The LSX Series is an excellent source of stable AC voltage over the frequency range of 15 to 1,200 Hz. The output frequency is quartz-crystal stabilized. Output voltages up to 600 VAC are provided using transformer options.

Phase Conversion:

With the ability to provide singe and three-phase outputs, the LSX Series is the perfect choice to provide 1 Phase to 3 Phase or 3 Phase to 1 Phase conversion.

Protective Transit Cases for Mobile Applications

Pacific Power Source offers rugged transit cases to protect your AC Source from adverse environmental conditions for mobile and/or military applications.

Specific benefits:

Environmental Protection (shock, vibration, moisture, heat),
Unrestricted Equipment Operation,
Quick Cover Removal & Installation,
Integrated wheels and Handles,
Stainless Steel Latches.

Available for following LSX models:
  • 3U: 115LSX, 120LSX, 315LSX, 320LSX
  • 5U: 140LSX, 160LSX, 345LSX, 360LSX


Power Source Specifications

Output Frequency:
15 to 1,200 Hz. Full Power

Line Regulation:
0.1% max for a ±10% line change.

Load Regulation:
15 to 200 Hz: < 0.25% , 200 to 1,200 Hz: Model and Form dependent. See datasheet. With external sense enabled. Improves to less than 0.1% with external sense and CSC enabled.

Output Distortion:
15 to 200 Hz: < ±0.25% THD, 200 to 1,200 Hz: Model, Frequency and From dependent. See datasheet.

Programmable Impedance:
Resistive -100 Ohm to +100 Ohm, Inductive 0 to 2 mH

Ripple and Noise:
-66 dB

Response Time:
60 microseconds typical, 10-90% load step.

Mechanical Specifications

All models are designed for operation in 19 inch equipment racks. Models 4 kVA and higher have side handles for ease of handling.

Standard 19 inch rack. Slide rails are available as an option for all models.

See models table tab for panel height.

Approximately 24 inch, from the front panel to the rear of the chassis.

Front or side forced air intake with rear exhaust. Automatic Fan Speed Control for low acoustic noise and extended fan life.

Dual Range Output Magnetics Options

LSX Series Power Sources can be equipped with output transformers to provide an alternate output voltage range. Selection of direct or transformer coupled range is performed by the controller via front panel or bus command. The standard frequency range for transformer coupled outputs is 45 to 1,200 Hz. Standard output ratios are 1.5:1, 2.0:1, and 2.5:1. Transformer outputs are supplied internally or externally via a Magnetics Module as listed in the above table. Consult the factory for additional information regarding special output ranges not listed above.

LSX Series Controller Specifications

All LSX Controllers include precise metering functions with data displayed via a 480×270 pixel graphical color LCD display. This, along with the dedicated Menu keys, softkeys and a decimal data entry keypad provides one of the most intuitive to operate AC power source controllers in the industry.

The LSX controllers include LAN (Ethernet) USB, GPIB and RS232 digital remote control interfaces as well as an number of analog and digital I/O control lines for system integration. Commands are structured in accordance with SCPI (Standard Commands for Programmable Instruments). The GPIB interface is compatible with the IEEE-488.2.

Range: 15 to 1,200 Hz.
Resolution: 4 significant digits, eg. 50.00, 400.0, etc.
Accuracy: ±0.01%, 15 to 1,200 Hz

Range: 0 to Vmax in 0.1 VAC steps.
Accuracy: Executive voltage is within ±50 mVAC (0.05%) of command voltage referenced to the internal voltmeter with CSC engaged.

Phase Angle:
Phase Separation of Phases B and C are programmable 0 to 360° relative to phase A.

Programmable Current, Peak Current, Power and VA Limit:
User programmable Current, Peak Current,  Power and VA limit is standard of all LSX Models. . Programmable range is from 0 to max rating of the power source model.

Output Voltmeter:
The Output Voltmeter is true RMS reading and each phase is measured independently. Line to neutral and line to line voltages are displayed. Range: 0-354 VACL-N, 0-708 VACL-L. Resolution: 0.1 VAC to front panel, 0.001 VAC to remote interface. Accuracy: ±0.2% of range + cal. ref.

Output Ammeter:
Output Ammeter is true RMS reading and each phase is measured independently. RMS and peak currents along with Crest factor are displayed. Range: 300% of system current rating. Resolution: 0.01 AAC to front panel, 0.001 AAC to remote interface. Accuracy: ±0.2% of range + cal ref.

Measures True Power (kW), Apparent Power (kVA) and power factor. Range: Based on ammeter. Resolution: 1.0 watts or VA to front panel, 1.0 watts or VA to remote interface.

Power Factor:
Calculated and displayed to three significant digits.

Expanding the AC Power Source into an Automated Test System

Pacific’s line of Smartsource® AC Power Sources enable the user to easily automate his testing by using Lab VIEW for Windows® or LabWindows®. An extensive list of Virtual Instruments (VIs) are offered for Pacific’s LSX Series Power Sources.


140LSX Power Source

345LSX Power Source

360LSX Power Source

120LSX Power Source

315LSX Power Source

320LSX Power Source

LSX Series Introduction Video

Brochures & Manuals

Product Brochure:

Download brochure to review product details.

Technical and Application Assistance:

Pacific Power Source’s seasoned sales and service team is here to help via chat, email or call 1-800-854-2433 or +1-949-251-1800.