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AC Power Supply Testing Programmable AC Source
0.1-300V 45-400Hz 350VA 500VA 1KVA with
RS-232C RS-485
Overview
This series of programmable AC variable frequency power supplies is designed for AC power supply testing, electronic product development, and laboratory applications. With an adjustable output voltage range of 0.1–300V and a frequency range of 45–400Hz, it provides flexible AC power conditions for evaluating the input performance and operating characteristics of power supplies and other AC-powered equipment.
Available in 350VA, 500VA, and 1KVA models, the series combines adjustable voltage and frequency, parameter preset functions, and standard RS-232C / RS-485 communication interfaces. Its Modbus RTU protocol allows integration with PLCs, host computers, and automated testing systems, making it suitable for bench testing, R&D verification, and production testing environments.
Key Features
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Adjustable AC Output for Power Supply Testing:
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Wide-range output voltage from 0.1–300V, with a low range of 0.1–150.0V and a high range of 150.1–300.0V, supporting different AC input requirements during testing.
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Adjustable output frequency from 45–400Hz with a 0.1Hz adjustment step, allowing users to evaluate equipment under different operating frequencies.
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Low waveform distortion of THD ≤2% under rated resistive load conditions, supporting stable AC power supply for testing applications.
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Stable and Reliable Output Performance:
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Voltage stability of ≤1% and frequency stability of ≤0.1% help maintain consistent output conditions during repeated tests.
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Load regulation of ≤1% and source voltage effect of ≤1% support stable operation under specified test conditions.
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Voltage soft-start gradually increases the output voltage to reduce sudden electrical impact on connected equipment.
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Programmable Control and Communication:
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Standard RS-232C and RS-485 communication interfaces support Modbus RTU communication with PLCs, host computers, and automated testing systems.
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Parameter preset function stores output voltage, output frequency, and output current upper-limit settings for convenient test setup.
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One-key access to common 50Hz and 60Hz voltage/frequency combinations helps simplify routine testing procedures.
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Comprehensive Protection Functions:
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Includes overload, overcurrent, overvoltage, overtemperature, and short-circuit protection to help protect the power supply and connected equipment.
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Graded overload protection applies different output cut-off delays according to the overload level.
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Visual alarm indication and corresponding fault codes help users identify protection events.
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Convenient Operation and Monitoring:
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Adjustable output parameters allow users to configure test conditions directly for different power supply applications.
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Display functions provide readings for output voltage, current, power, frequency, and power factor.
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Compact benchtop construction is suitable for laboratory workstations, R&D areas, and indoor testing environments.
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Technical Specifications
| Parameter | Model 1 | Model 2 | Model 3 |
|---|---|---|---|
| Rated Capacity | 350VA | 500VA | 1000VA (1KVA) |
| Input Power | Single-phase AC 220V ±10%, 50Hz ±5Hz | Single-phase AC 220V ±10%, 50Hz ±5Hz | Single-phase AC 220V ±10%, 50Hz ±5Hz |
| AC Output Voltage | 0.1–300V | 0.1–300V | 0.1–300V |
| AC Output Frequency | 45–400Hz | 45–400Hz | 45–400Hz |
| Rated Current (120V / 240V) | 2.9A / 1.45A | 4.2A / 2.1A | 8.4A / 4.2A |
| Efficiency | ≥80% | ≥80% | ≥80% |
Common Performance Specifications
| Parameter | Specification |
|---|---|
| Voltage Stability | ≤1% |
| Frequency Stability | ≤0.1% |
| Load Regulation | ≤1% |
| Source Voltage Effect | ≤1% |
| Output Waveform Distortion (THD) | ≤2% under rated resistive load conditions |
| Crest Factor | 1.41 ±0.10 |
| Frequency Adjustment Step | 0.1Hz |
| Voltage Adjustment Range | 0.1–150.0V (Low Range); 150.1–300.0V (High Range) |
| Communication Interfaces | RS-232C / RS-485 |
| Communication Protocol | Modbus RTU |
| Protection Functions | Overload, overcurrent, overvoltage, overtemperature, and short-circuit protection |
| Overtemperature Protection Threshold | 85°C ±5°C (power device temperature) |
| Enclosure Protection | IP20 |
| Operating Temperature | -10°C to 40°C |
| Operating Humidity | 10%–90% at 25°C, non-condensing |
| Maximum Operating Altitude | ≤2000m |
Model Selection Tips
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Model 1 – 350VA: Suitable for low-power AC power supply testing, laboratory experiments, precision instrument power verification, and R&D of low-power electronic devices.
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Model 2 – 500VA: A practical option for medium-capacity AC power supply testing, household appliance power verification, and electronic production line testing.
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Model 3 – 1KVA: Provides higher rated output capacity for industrial power supply testing, higher-power electronic equipment verification, and automated testing setups. Actual load suitability depends on the equipment's rated power, current demand, and startup characteristics.
Application Scenarios
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AC Power Supply Testing: Provides adjustable AC voltage and frequency for checking the input operation and functional performance of AC power supplies under different test conditions.
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Switching Power Supply Testing: Supplies adjustable AC input power for functional checks of switching power supply units and power conversion equipment.
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Power Adapter Testing: Supports AC input verification of power adapters with different voltage and frequency requirements, helping evaluate their operating performance.
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Electronic Equipment Power Verification: Provides configurable AC power for checking the power input and basic operating behavior of electronic products during development and inspection.
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Production Line Testing: Works with PLCs, host computers, and automated testing systems through RS-232C / RS-485 communication for programmable test setups.
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R&D and Laboratory Testing: Allows engineers to configure different output voltage and frequency conditions for product development, performance evaluation, and repeatable bench testing.
Choose the programmable AC variable frequency power supply that matches your testing requirements. With three capacity options, adjustable 0.1–300V output, 45–400Hz frequency control, and standard RS-232C / RS-485 communication, this series provides a flexible AC source for power supply testing, R&D, and production applications.
Warranty
30-Day return and refund guarantee (Refer to our Refund Policy), 2-year warranty (only available for orders purchased directly from kuaiquinstrument.com), lifetime technique support by KUAIQU.
Please feel free to reach us with any concerns:
Email: kuaiquinstrument@163.com
We strive to reply to you within 24 hours.
Shenzhen Kuaiqu Electronic Co., Ltd. was founded in 2014 and is located in Shenzhen City, Guangdong Province. It is a scientific and technological enterprise integrating,production and sales. Specializing in the production of DC stabilized power supply, variable frequency power supply, switching power supply, program-controlled power supply and other 100 kinds of measuring teaching instruments and industrial special equipment.
We are committed to delivering premium products and exceptional customer service, striving to be your most reliable and intelligent assistant.
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