Take Control of Your AC Test Power

The ASX Series is a family of High Performance Switching AC power sources covering the power range from 1.5kVA to 6kVA (12kVA to be released soon). The product line offers both single and three phase models. Units are conservatively designed and output power ratings are based on the most severe 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 to harmonic testing and sophisticated bus programmable transient simulation.

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

Key Features Provide Application Versatility

Design Provides Total Control of AC Power

• All ASX Series power source models may be equipped with a digitally programmable Oscillator/Controller or a manual version.

• 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 RS-232 or IEEE 488.2/ SCPI BUS. LabVIEW for Windows® and LabWindows® Instrument Drivers are available.

Special ASX 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.

Programmable Dynamic Output Impedance - Prog-Z (optional on UPC1/3)
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.

Waveform Library
Up to 22 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 2-22 are editable and can be substituted in any output phase. An unlimited number of waveforms may be stored on the computer for those using a programmable UPC.

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.

Waveform Analysis (optional on UPC1/3)

Provides both graphic (using LabView for WindowsT) and numeric displays of the harmonic structure of a voltage or current waveform. Each waveform is analyzed for its harmonic content up to the 51st harmonic. Amplitude and phase are reported to the local display. The LabVIEWT instrument driver displays numeric values as well as a graphic summary of the harmonic spectrum.

Waveform Synthesis (optional on UPC1/3)
Quickly create virtually any AC test 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.

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.

Cycle Based Transients
Create and execute transients that substitute a waveform in any or all phases for 1 to 100 cycles. The waveform being substituted can be selected and/or modified from the waveform library.

ASX Series AC Power Sources

Notes:

All single phase output units (Model 115 ASX 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 below.

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.

Applications

AC Test Power
The ASX Series Power Source is equipped with a powerful microcontroller 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 ASX 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.

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

Controller Selection Guide

Six controller models are available with the ASX-Series. They include 1 Phase and 3 Phase models for both manual and programmable control.

• UPC-1M, 1 Phase Manual Control, 15 Hz to 1,200 Hz.

• UPC-3M, 3 Phase Manual Control, 15 Hz to 1,200 Hz.

• UPC-3EM, 3 Phase Manual Control, 15 Hz to 599 Hz.

• UPC-1, 1 Phase Programmable Control, 15 Hz to 1,200 Hz.

• UPC-3, 3 Phase Programmable Control, 15 Hz to 1,200 Hz.

• UPC-3E, 3 Phase Programmable Control, 15 Hz to 599 Hz.

All controllers provide manual operation from the front panel. Programmable Controllers may be programmed from the front panel or from a remote interface. RS232 Interface is standard. IEEE 488 interface is optional.

Power Source Specifications

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

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

Load Regulation:
0.25% 15 to 400 Hz., 0.50% 400 to 1,200 Hz. With external sense enabled. Improves to less than 0.1% with external sense and CSC enabled.

Output Distortion:
0.25% THD 15 to 200 Hz., 0.50% THD 200 to 1,200 Hz.

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.

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

Height:
See model table above for panel height.

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

Cooling:
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

ASX 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.

UPC Series Controller Specifications

The latest additions to Pacific's SmartsourceT family of UPC Controllers are the UPC-1M, UPC-3M, UPC-1 and UPC-3. The UPC Controller is a modular component of the ASX Series and is available in four configurations ranging from 1 Phase to 3 Phase and Manual Control to Programmable Control. The table below lists each model according to key features.

All UPC Controllers include precise metering functions with data displayed via a 160 character LCD display. This, along with the 30-key front panel, provides the industry's most powerful and user-friendly controller.

The UPC-1 and UPC-3 controllers are available with either the RS-232 or GPIB remote interface. Commands are structured in accordance with SCPI (Standard Commands for Programmable Instruments). The RS-232 serial port operates up to 38.4 Bps. The GPIB interface is compatible with the IEEE-488.2.

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

Voltage:
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 on the UPC-3 controller. Phase separation is fixed at 120° and 240°, respectively, on the UPC-3M controller.

Programmable Current Limit:
Programmable Current limit is provided on the UPC-1 and the UPC-3 controllers. Programmable range is from 0 to Ipeak, max of the power source.

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.

Power:
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 SmartsourceT AC Power Sources enable the engineer to easily automate his testing by using Lab VIEW for WindowsT or LabWindowsT. An extensive list of Virtual Instruments (VIs) are offered for Pacific's ASX Series Power Sources.

Specifications subject to change without notice.