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.
Provides for exceptional accuracy of the AC output Voltage. When enabled, accuracy improves to ±0.1% referenced to the power source internal voltmeter.
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.
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.
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.
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.
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.
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).
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.
15 to 1,200 Hz. Full Power
0.1% max for a ±10% line change.
Resistive -100 Ohm to +100 Ohm, Inductive 0 to 2 mH
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
15 to 200 Hz: < ±0.25% THD, 200 to 1,200 Hz: Model, Frequency and Form dependent. See datasheet.
60 microseconds typical, 10-90% load step.
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.
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.
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.
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 a 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 Separation of Phases B and C are programmable 0 to 360° relative to phase A.
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.
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.
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 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.
Calculated and displayed to three significant digits.
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.
