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Home | Products | Programmable AC Power Supply | Linear AC Power Source
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LMX Series

Linear AC Power Source, 500VA to 30kVA

Buy / Rent
Datasheet

The LMX Series delivers low-distortion, high-fidelity AC power through precision linear amplification, ensuring accurate waveform reproduction across a wide small-signal bandwidth. Operating from 15Hz to 5,000Hz, models provide output voltages up to 600Vrms L-N and power levels ranging from 500VA to 30kVA. Available in both single-phase and three-phase configurations, the LMX Series offers scalable solutions from 500VA standalone units to parallel systems up to 30kVA.

Power:

Up to 30kVA

Voltage:

Up to 0-300Vac
Direct Coupled Out

Frequency:

15Hz - 5000Hz

Why Choose LMX Series

Very High Frequency Conversion

Ideal for avionics or high-frequency applications

6:1 Peak Current Capability

Supports inrush current testing without waveform distortion

Cleanest Power and Lowest Distortion

Highest Crest Factor supports inrush currents and transients

Programmable Impedance

Lowest output impedance for EN61000-3-2, 3 testing

Key Features

  • Single and Three-Phase Models
  • 500kVA to 6kVA model standard
  • 8kVA to 30kVA model option
  • Up to 0-300Vac Direct Coupled Out
  • Very high frequency: 15Hz-5000Hz full bandwidth
  • Externally referenced measuring device calibration
  • Full Galvanic Isolation from Facility AC Input to Load Input and Between Input Phases / Channels
  • Advanced waveform capture & scope function
  • Safety Programmable Protection Limits for real power, apparent power, over-voltage and over-temperature
  • Full current into very low power factor reactive loads
  • Advanced Transients & Programming Capability: Sine, Square, Triangle, THD and Arbitrary, Harmonics waveforms
  • Phase Angle Programming on 3ø Models
  • Current, Apparent Power & True Power on all Phases
  • 200 programs for arbitrary waveforms & transients (List, Pulse, Step Modes)
  • Up to 0-300Vac Direct Coupled Output (split phase)
  • Single phase power source models may be controlled to operate on either a 0-135Vac range or a 0-270Vac range. Three phase models are additionally switchable 3ø to 1ø output power form.
  • Precision True-RMS metering of Volts, Amps, Power, VA, Power Factor and Crest Factor
  • Precision Voltage Programming – 0.02% with Continuous Self Calibration (CSC)
  • Extensive Analog and Digital I/O for system integration
  • RS-232, USB, Modbus, TCP, GPIB, SCPI compatibility; IVI Instrument Drivers
  • CE (EMC/Safety) & NRTL Marked
  • Built-In SmartSource Suite Remote Control Platform

Clean Power & Low Distortion Using Linear AC Source

Linear AC Power Source Allows for High Crest Factor, Low Distortion & High Fidelity Output Waveforms

The linear amplifier architecture used in the LMX Series enables the generation of high crest factor, low-distortion output waveforms required by demanding AC test applications. Available from 500VA to 6kVA as standalone units and scalable up to 30kVA through parallel operation, the LMX Series supports both single-phase and three-phase configurations.

Designed conservatively for demanding input conditions, output voltage, power factor, and temperature variations, the LMX Series maintains excellent waveform quality across dynamic loads. Combined with low output impedance and high crest factor performance, it delivers exceptionally clean AC power for critical testing applications.

Wide Selection of Voltage Ranges (T Option)

LMX Series systems support output ranges up to 135VLN / 270VLL for single-phase operation and 135VLN / 234VLL for three-phase configurations. Optional transformer-coupled output configurations (T Option) provide extended output voltage capability up to 600V in single-phase operation and 585V in three-phase operation.

  • Automatic switching between direct-coupled and transformer-coupled output ranges
  • Transformer-coupled outputs available in 1.5:1, 2.0:1, and 2.5:1 ratios
  • Expanded voltage range flexibility for diverse test requirements

Generate Advanced Waveforms and Transients

Voltage, waveform, and frequency outputs can be programmed directly through an intuitive spreadsheet-style interface. Data may be entered independently for each phase or synchronized across all phases. Built-in transient modes include List, Pulse, and Step operation, while waveform generation supports clipped sine, square, triangle, THD, stepped square, and arbitrary waveforms.

  • More than 200 arbitrary waveform storage locations
  • List, Pulse, and Step transient generation modes
  • Sine, Square, Triangle, THD, and Arbitrary waveform generation

Simplify Testing with Smart Control, Built-In

SmartSource Suite provides a browser-based platform for real-time monitoring, control, development, and execution of automated test sequences. The intuitive interface enables convenient access from desktop and mobile devices, helping improve testing efficiency and productivity.

  • Browser-based remote access
  • Enhanced visualization and reporting tools
  • Multi-window monitoring and control
  • Increased productivity and reduced setup time

Featured White Paper

Linear vs. PWM AC Power Source

Watch Now

Single Phase Models

Model Rated
Power (VA)		 Voltage Max
(L-N/L-L) (Vrms)		 Rated Current Max (Arms) Output
Frequency (Hz)		 AC Input U CTA
315LSX 1500 Direct:
1Ø: 132/264
3Ø: 132 		Direct:
1Ø: 12/8
3Ø: 4/0 		15-1200 1Ø 3 Buy / Rent
320LSX 2000 Direct:
1Ø: 150/300
3Ø: 150 		Direct:
1Ø: 20/12
3Ø: 7/0 		15-1200 1Ø 3 Buy / Rent
345LSX(T) 4500 Direct:
1Ø: 135/270
3Ø: 135

Transformer option:
T 1.5:1 (1Ø): 202/404
T 1.5:1 (3Ø): 202/350
T 2.0:1 (1Ø): 270/540
T 2.0:1 (3Ø): 270/468
T 2.5:1 (1Ø): 338/600
T 2.5:1 (3Ø): 338/585 		Direct:
1Ø: 36/12
3Ø: 12

Transformer:
T 1.5:1 (1Ø): 24/8
T 1.5:1 (3Ø): 8/0
T 2.0:1 (1Ø): 18/6
T 2.0:1 (3Ø): 6/0
T 2.5:1 (1Ø): 14.4/4.8
T 2.5:1 (3Ø): 4.8/0 		15-1200 3Ø 8 Buy / Rent
360LSX(T) 6000 Direct:
1Ø: 132/264
3Ø: 132

Transformer option:
T 1.5:1 (1Ø): 198/396
T 1.5:1 (3Ø): 198/342
T 2.0:1 (1Ø): 264/528
T 2.0:1 (3Ø): 264/457
T 2.5:1 (1Ø): 330/600
T 2.5:1 (3Ø): 330/572 		Direct:
1Ø: 48/16
3Ø: 16

Transformer:
T 1.5:1 (1Ø): 32/10.7
T 1.5:1 (3Ø): 10.7
T 2.0:1 (1Ø): 24/8
T 2.0:1 (3Ø): 8
T 2.5:1 (1Ø): 19.2/6.4
T 2.5:1 (3Ø): 6.4 		15-1200 3Ø 8 Buy / Rent

Three Phase Models

Model Rated Power (VA) Voltage Max (L-N/L-L) Rated Current Max (Arms) Output Frequency (Hz) AC Input U CTA
105LMX 500 Direct: 135/270 Direct: 4.0/2.0 15-5000 1Ø 3 Buy / Rent
105LMXT 500 Direct: 135/720
Transformer:
202/404 (T 1.5:1)
270/540 (T 2.0:1)
338/600 (T 2.5:1) 		Direct: 4.0/2.0
Transformer:
2.6/1.3 (T 1.5:1)
2.0/1.0 (T 2.0:1)
1.6/0.8 (T 2.5:1) 		45-5000 1Ø 3 Buy / Rent
108LMX 750 Direct: 135/270 Direct: 6.0/3.0 15-5000 1Ø 3 Buy / Rent
108LMXT 750 Direct: 135/720
Transformer:
202/404
270/540
338/600 		Direct: 6.0/3.0
Transformer:
4.0/2.0
3.0/1.5
2.4/1.2 		45-5000 1Ø 3 Buy / Rent
112LMX 1200 Direct: 150/300 Direct: 10.0/5.0 15-5000 1Ø 3 Buy / Rent
140LMX 4000 Direct: 135/270 Direct: 32/16 15-5000 3Ø 8 Buy / Rent
140LMXT 4000 Direct: 135/720
Transformer:
202/404
270/540
338/600 		Direct: 32/16
Transformer:
21.3/10.7
16.0/8.0
12.8/6.4 		45-5000 3Ø 11 Buy / Rent
160LMX 6000 Direct: 135/270 Direct: 48/16 15-5000 3Ø 8 Buy / Rent
160LMXT 6000 Direct: 135/720
Transformer:
202/404
270/540
338/600 		Direct: 48/16
Transformer:
32.0/10.7
24.0/8.0
19.2/6.4 		45-5000 3Ø 11 Buy / Rent
  • All single-phase output units 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.)
Title Document Type
LMX Series Linear AC Power Source Datasheet
Datasheet

FAQ

The LMX Series is a linear AC power source designed to deliver extremely clean, low‑distortion AC power for applications where power purity and signal integrity are critical.

Key takeaway: LMX prioritizes waveform quality over efficiency.

A linear AC power source uses linear amplification technology instead of high‑frequency PWM switching. This results in:

  • Very low output noise
  • Minimal harmonic distortion
  • Highly stable and clean AC waveforms

The LMX Series is primarily used for:

  • Precision power testing
  • Noise‑sensitive applications
  • Aerospace and defense electronics
  • Avionics and military systems
  • High‑accuracy laboratory testing

The LMX Series is commonly used by:

  • Aerospace and defense manufacturers
  • Avionics test labs
  • Research institutions
  • Calibration and metrology labs
  • Engineers testing noise‑sensitive equipment

Yes. The LMX Series is a fully programmable AC power source, allowing control of:

  • Output voltage
  • Output frequency
  • Operating conditions for different test scenarios

The LMX Series supports configurations suitable for single phase and three phase testing, depending on the model and system setup.

Yes. The LMX Series is commonly used in compliance, certification, and qualification testing, especially where clean power input is required by test standards.

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Contact:

CALTEST INSTRUMENTS PVT LTD

NMR Green Nest, Ground Floor
Hitech Defense and Aerospace Park, Bangalore North,
Bandi Kodigehalli
Bangalore 562149, KA.

info@caltestindia.com
+919845007602

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