PXe-A Series Variable AC Power Supplies
PX Electronics PXe-A Series variable AC power supplies provide controlled, adjustable AC voltage and frequency for electrical product testing, development and validation. They allow engineers to operate equipment under defined supply conditions rather than relying directly on fixed site mains power.
Available in single-phase and three-phase configurations, the range can be specified for laboratory testing, production-line use, and higher-power industrial equipment. Adjustable output voltage, selectable frequency ranges and optional remote interfaces allow the supply to be matched to the equipment under test and the required test procedure.
Single-phase systems can provide adjustable output ranges of 0 to 150V AC or 0 to 300V AC. Three-phase systems are available with adjustable output up to 0 to 260V line-to-neutral and 0 to 520V line-to-line. Standard adjustable frequency extends from 45 to 200Hz, with an optional 40 to 500Hz range available for wider-frequency applications.
Technical Highlights for Variable AC Power Testing
Adjustable voltage and frequency
Set the AC output voltage and frequency to match nominal operating conditions, upper and lower voltage limits, regional mains requirements or application-specific test points.
Single-phase and three-phase configurations
Available with different input and output phase arrangements to suit laboratory equipment, production systems and larger industrial loads.
Controlled sine-wave output
Solid-state IGBT PWM regulation provides repeatable AC output with total harmonic distortion specified at 3% or lower with a linear load.
Support for non-linear loads
A published current crest factor of 3:1 supports testing of equipment with rectifier inputs and other non-linear current waveforms, subject to the selected unit’s RMS current and kVA limits.
Digital measurement and monitoring
Front-panel metering provides output voltage, current, frequency, power and power factor information during testing.
Remote interface options
Optional RS232C, RS485 and GPIB interfaces are available for integration into remote or automated test arrangements. The exact control and readback functions should be specified for the selected model.
Electrical isolation and protection
Transformer isolation and electronic protection are provided for overcurrent, overload, overvoltage, overtemperature and short-circuit conditions.
Configurable AC Output for Electrical Testing
PXe AC power supplies can be configured around the available input supply, required output phase, adjustable voltage range, operating frequency and connected load.
The range covers compact single-phase supplies through to larger three-phase industrial systems. Standard listed ratings range from 0.5 kVA to 200 kVA for single-phase output and from 1 kVA to 500 kVA for three-phase output. Higher-capacity engineered systems may be available following review of the application.
Available configurations:
| Parameter | Available Configuration |
|---|---|
| Output Phase | Single-phase or three-phase |
| Single-Phase Voltage | Fixed output or adjustable 0 to 150V AC / 0 to 300V AC |
| Three-Phase Voltage | Fixed output or adjustable up to 0 to 260V L-N / 0 to 520V L-L |
| Standard Frequency | Fixed 50Hz, 60Hz, 100Hz or 200Hz |
| Variable Frequency | 45 to 200Hz |
| Extended Frequency | Optional 40 to 500Hz |
| Output Connection | Three-phase, three-wire or four-wire |
| Control | Manual front-panel adjustment or optional remote interface |
| Construction | Bench, 19-inch rack-mounted, mobile or floor-standing |
Input and Output Arrangements
Input and output phases do not have to be the same. Available configurations include single-phase input to single-phase output, single-phase input to three-phase output, three-phase input to single-phase output, and three-phase input to three-phase output.
Using a three-phase input for a higher-power single-phase load can reduce the input current carried by each phase and may be preferable where the available site supply allows it.
Load Capability
The supply can support resistive, inductive, capacitive and rectifier-fed loads when correctly sized. A 3:1 current crest factor supports many non-linear electronic loads, subject to the RMS current, peak current and total kVA limits of the selected unit.
Motors, transformers, compressors and equipment with large input capacitors may draw considerably more current during start-up than during normal operation. These applications should be selected using the starting current and its duration, rather than the running rating alone.
Order Codes:
A product order code can be derived from the main ordering information using the structure below:
Generic order code is based on this format: PXe-130000-A, and all PXE order codes start with the six digits like 130030 in this case, indicating 1ph-input 3ph-output and 30kVA
For example a 1 phase in 50Hz, 3 phase out 47-63Hz, 7.5kVA, Variable, Manual Control = PXE-130007.5-A
PXE-130007.5-A-[INPUT]-[OUTPUT]-[RATING]-[ENCLOSURE]-[CONTROL]
PXE-130007.5-A-[1P230V50N]-[3P0-300V/0-520VN47-63N]-[7.5kVA]-[IP22]-[MC]
This would represent:
(PXE-130030-A) – PX Electronics SFC Unit 30kVA
(1P230V50N) – 1 phase, 230VL-L+Neutral, 50Hz input
(3P0-300V/0520V47-63N) – 3 phase, Low 0-300L-L/High 0-520L-L+Neutral, 47-63Hz output
(7.5KVA) – 7.5kVA rating
(IP22) – IP22 enclosure
(MC) – Manual Control
For a manually controlled standard enclosure version, the part number may look like this:
PXe-330050-A-3P415V50N-3P0-300V/0-520VN47-63-50KVA-IP22-MC
| Model | Input | Output | Capacity | Enclosure | Interface Options |
|---|---|---|---|---|---|
|
PXe-330050-A PX Electronics – AC Power Supply |
3P2415V50 3P = Three Phase |
3P0-300V/0-520V47-63 3P = Three Phase |
50KVA
50kVA capacity |
IP22
Standard IP22 enclosure |
MC
Manual Control Interface |
Available Options:
IP54-rated enclosure
Rugged enclosure option for outdoor, industrial, marine or aviation-related environments where additional protection is required against humidity, condensation, salt spray, water ingress and dust.
Conformal coating
Additional coating of internal PCBs and selected electronic components to improve protection in harsh, humid or corrosive environments.
19-inch rack mount construction
Available on smaller models where the AC power supply needs to be integrated into an existing rack, cabinet, laboratory bench system or production test area.
Remote watchdog monitoring
Typically offered on models above 50kVA. The watchdog system can provide real-time fault notification via SMS, data history logging, remote operation, and automatic restart functionality, subject to application and site requirements.
Cables and terminations
Input and output cable assemblies, connectors, and termination arrangements can be supplied to suit installation, load connection, and site operating requirements.
Mobile base and handling options
Wheeled bases, rubber castors, and swivel tow bars are available when the AC power supply needs to be moved between test areas, production lines, service bays, or operating locations. This option is suitable for facilities where flexible positioning and practical handling are important.
PXe-130000-A Series Technical Specification
| Capacity | |
| Single Phase Output (Other options available on request) | kVA Ratings: 0.5kVA, 1kVA, 3kVA, 5kVA, 10kVA, 15kVA, 20kVA, 30kVA, 50kVA, 60kVA, 75kVA, 100kVA, 150kVA, 200kVA |
| Three Phase Output (Other options available on request) | kVA Ratings: 1kVA, 3kVA, 6kVA, 9kVA, 15kVA, 20kVA, 30kVA, 45kVA, 60kVA, 100kVA, 150kVA, 200kVA, 300kVA, 400kVA, 500kVA |
| Input | |
| Single Phase (Select One Individual Voltage) | 110Vac ±10%, 115Vac ±10%, 120Vac ±10%, 127Vac ±10%, 220Vac ±10%, 230Vac ±10%, 240Vac ±10%, 400Vac ±10% |
| Three Phase (Select One Individual Voltage) | 115-127 (L-N) / 200-220V (L-L) ±10%, 220-240 (L-N) / 380-415V (L-L) ±10%, 440V (L-L) ±10%, 480V (L-L) ±5%, 3 Phase 3 Wire or 3 Phase 4 Wire |
| Frequency | 50Hz/60Hz ±5%, 400Hz (Optional) |
| Power Factor | ≥ 0.8 (standard type) ≥ 0.9 (optional type, 12 or 18 pulse) |
| Output | |
| Single Phase (Select One Individual Voltage) | Fixed: 110V, 115V, 120V, 127V, 220V, 230V, 240V, 400V Adjustable: 0~150Vac / 0~300Vac |
| Three Phase (Select One Individual Voltage) | Fixed: 115/200V, 120/208V, 127/220V, 220/380V, 230/400V, 240/415V, 254/440V, 277/480V (L-N/L-L), 400/690V (L-N/L-L), 3 Phase 3 Wire or 3 Phase 4 Wire Adjustable: 0~260V (L-N) / 0~520V (L-L), 3 Phase 3 Wire or 3 Phase 4 Wire |
| Frequency | Fixed: 50Hz, 60Hz, 100Hz, 200Hz, 45–200Hz (adjustable) Optional: 400Hz / 40–500Hz (adjustable), 16.67Hz, 25Hz, 50Hz, 60Hz, 400–1000Hz |
| Voltage Accuracy | ≤ ±1% FS (Full Scale) |
| Frequency Accuracy | ≤ ±0.1% FS (Full Scale) |
| Total Harmonic Distortion | THD ≤ 3% @ linear load, pure sine wave output |
| Crest Factor (Pk/rms) | 3:1 |
| Overload | 100% for continuous, 101–200% shut down in 200mS |
| Interface | None for standard units, RS232C/RS485/GPIB (Optional) |
| Protection | Over-current, over-load, over-voltage, over-temp, short circuit, alarm and indicators |
| Enclosure IP Rating | IP22 (Standard), IP32, IP54 (Optional). Special enclosure options available |
| LED/LCD Display | Digital frequency meter, Digital voltage meter, Digital current meter, Digital power/PF meter |
| Connectors | Hard-wire terminals, EN60309, MIL-STD, Or client choice |
| Operating conditions | |
| Temperature | Operation: -10℃~55℃ Ambient: -10℃~45℃ |
| Noise | ≤ 65dB at 1 meter EN 55022, IEC1000-4 |
| Humidity | 10~90% non-condensing |
| Cooling | Variable speed fan, filtered air intake in base, exhaust at rear |
| Altitude | ≤ 1800m |
| Castors or Feet | 0.5–3kVA have rubber feet and lifting handles, 4kVA+ have castors with front brakes. A/Vs or feet optional |
| CE | CE Marked |
| Reliability and Efficiency | |
| Mean Time Between Failure (MTBF) | 50,000Hrs |
| Mean Time To Restore (MTTR) | < 30 min |
| Overall Efficiency | ≥ 85% |
| Standards | |
| GB50054-95, GB 50150-1991, GB 50150-2006, GB 50171-1992, GB/T 16935.5-2008, GB/T16935.4-2011 |
|
| EN IEC61000-3-2, EN 61000-3-3, EN55032, EN55035, MIL-STD-1399, MIL-STD 461, MIL-STD704, STANAG 1008 |
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| For more information and support, please feel free to contact us |
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