Product Compliance Pre-testing AC Variable

Frequency Power Source 350VA 500VA 1KVA with

RS-232C RS-485 Communication

Programmable AC Power Supply for Product Compliance Pre-testing

This programmable AC variable frequency power source is designed for product compliance pre-testing, laboratory evaluation, and AC input condition verification. Available in three capacity options — Model 1 (350VA), Model 2 (500VA), and Model 3 (1KVA) — it provides an adjustable AC output voltage range of 0.1–300V and a variable output frequency range of 45–400Hz. These adjustable output conditions allow engineers and testing technicians to evaluate compatible electronic products under different AC power supply conditions before formal compliance testing.

Before submitting electronic products for compliance testing, manufacturers may need to check whether their products operate under specified input voltage and frequency conditions. This programmable AC power supply supports two voltage ranges, from 0.1–150.0V in the low-voltage range and 150.1–300.0V in the high-voltage range, with a frequency adjustment step of 0.1Hz. It also provides three groups of parameter preset storage for output voltage, frequency, and current limit settings, together with convenient 50Hz and 60Hz quick selection.

For testing environments that require programmable power control, the entire series comes standard with RS-232C and RS-485 communication interfaces and supports the Modbus RTU protocol. It can connect to compatible PLCs, host computers, and automated testing systems. Combined with electrical parameter displays, voltage soft start, and multiple protection functions, this series provides flexible AC power conditions for product pre-compliance evaluation and laboratory testing.

Key Features

Adjustable 0.1–300V AC Output for Input Voltage Verification

This programmable AC power supply provides two selectable output voltage ranges: 0.1–150.0V in the low-voltage range and 150.1–300.0V in the high-voltage range.

The adjustable AC output allows users to establish different input voltage conditions for compatible electronic products during pre-compliance evaluation. Engineers can select the required voltage according to the product's rated input specifications and check its operating condition before formal compliance testing.

45–400Hz Variable Frequency Output

With an adjustable output frequency range of 45–400Hz and a frequency adjustment step of 0.1Hz, this AC variable frequency power source supports product evaluation under different AC frequency conditions.

Users can adjust the output frequency according to the requirements of the device under test. This is useful for checking compatible electronic products designed for different power frequencies and evaluating their operation under selected non-standard frequency conditions.

Three Groups of Parameter Preset Storage

The power supply supports three groups of preset parameters, including output voltage, output frequency, and output current limit.

Users can store commonly used power settings and recall them when performing repeated pre-compliance checks. This reduces repeated manual adjustments and makes it more convenient to establish consistent AC input conditions for different products or testing procedures.

Quick 50Hz / 60Hz Power Frequency Selection

Built-in 50Hz and 60Hz quick selection functions allow users to switch between two commonly used AC power frequency standards and their corresponding voltage-frequency combinations.

This feature is useful when checking compatible electronic products intended for different regional power environments. It provides a convenient way to establish common frequency conditions during product pre-testing and laboratory evaluation.

RS-232C / RS-485 Programmable Communication

The entire series comes standard with RS-232C and RS-485 communication interfaces and supports the Modbus RTU communication protocol.

The power supply can connect to compatible PLCs, host computers, and automated testing systems for programmable AC output control. This allows users to integrate adjustable voltage and frequency settings into a larger product testing setup, supporting repeatable power supply conditions during pre-compliance evaluation.

Electrical Parameter Display for Test Observation

The front-panel display provides readings for output voltage, current, power, frequency, and power factor.

These displayed electrical parameters help engineers observe the power supply and connected load conditions during product pre-testing. The display provides 0.1V voltage resolution, 0.1Hz frequency resolution, and different current display resolutions for the low- and high-voltage ranges.

Multi-Level Overload Protection

The power supply features a two-stage overload protection mechanism that disconnects the output when the output current exceeds the rated operating range.

• When the output current exceeds 1.0 times but does not exceed 1.1 times the rated current, the output is disconnected after a 15-second delay.

• When the output current reaches 1.1 times and up to 1.2 times the rated current, the output is disconnected after a 5-second delay.

This staged protection design provides different response times according to the overload level.

Comprehensive Protection with Fault Indication

The power supply includes overcurrent, overvoltage, overtemperature, and short-circuit protection.

When a protection condition is triggered, a visual alarm indication is provided, and the front panel displays the corresponding fault code to help users identify the protection status.

The overtemperature protection threshold is 85°C ± 5°C at the power device.

Voltage Soft-Start Function

The voltage soft-start function gradually increases the output voltage when the output is established, helping reduce sudden voltage changes and inrush impact on the connected device.

This function is useful during product pre-testing when a controlled voltage rise is preferred for powering compatible electronic equipment.

Technical Specifications

Model Selection and Rated Output Capacity

General Performance Specifications

Functions and Protection

Mechanical and Environmental Specifications

Model Selection Tips

Model 1 – 350VA for Low-Power Product Pre-testing

Model 1 provides a rated capacity of 350VA, making it suitable for low-power product development, precision instrument power supply testing, and pre-compliance evaluation of low-power electronic devices.

It is a practical choice for laboratory applications where adjustable AC voltage and frequency are required to check the input power conditions of relatively low-power products before formal compliance testing.

Model 2 – 500VA for Medium-Power Compliance Pre-testing

Model 2 offers a rated capacity of 500VA and is suitable for medium-power electronic products, household appliance pre-compliance evaluation, and electronic production line testing.

Its adjustable voltage and frequency output, three groups of preset parameters, and programmable communication interfaces support repeatable AC power conditions during laboratory evaluation and product preparation before formal compliance testing.

Model 3 – 1KVA for Higher-Power Product Pre-testing

Model 3 provides a rated capacity of 1000VA (1KVA), offering higher output capacity for industrial electronic product evaluation, larger motor drive testing, and data center equipment power input checks.

It is suitable for pre-compliance applications that require greater AC output capacity while retaining adjustable voltage, variable frequency, and programmable communication functions.

Application Scenarios

Electronic Product Pre-compliance Evaluation

Before formal compliance testing, electronic product manufacturers may need to verify whether their products operate under specified AC input voltage and frequency conditions.

This programmable AC power supply provides adjustable voltage from 0.1V to 300V and variable frequency from 45Hz to 400Hz. Engineers can select suitable input conditions for compatible electronic products and observe the displayed electrical parameters during preliminary evaluation.

AC Input Voltage and Frequency Verification

Different electronic products may have specific AC input voltage and frequency requirements. The adjustable output allows users to establish selected power conditions and check the operating response of compatible products before submitting them for formal testing.

The 50Hz / 60Hz quick selection function also makes it convenient to evaluate products designed for common regional power frequency standards.

Household Appliance Compliance Pre-testing

Household appliances intended for different markets may have different input voltage and frequency requirements. The power supply can provide adjustable AC input conditions for compatible appliances during preliminary functional and compliance-related evaluation.

Model 1, Model 2, and Model 3 offer different rated capacities, allowing users to select an appropriate option according to the power requirements of the appliance under test.

Electronic Power Adapter Pre-testing

The programmable voltage and frequency output can provide adjustable AC input conditions for compatible electronic power adapters during laboratory evaluation.

Users can select suitable input settings according to the adapter's rated input specifications and observe the displayed voltage, current, power, and frequency readings during preliminary testing.

Motor and Drive Product Evaluation

For compatible AC motors and drive-related electronic products, the power supply provides adjustable voltage and variable frequency output within its rated capacity.

The 45–400Hz frequency range allows users to establish different AC supply frequency conditions for preliminary evaluation of motor-related electrical equipment.

LED Driver and Lighting Product Pre-testing

The adjustable AC voltage and frequency output can supply compatible LED drivers and lighting products during preliminary evaluation.

Users can select appropriate input conditions according to the rated specifications of the lighting product and observe the electrical parameters displayed by the power supply. This supports preliminary power input checks before further product testing.

International Market Power Compatibility Checks

Electronic products intended for international markets may need to operate under different regional AC power frequency conditions.

With adjustable voltage, variable frequency, and built-in 50Hz / 60Hz quick selection, this power supply helps users establish common power conditions when evaluating compatible products for different markets.

Automated Pre-compliance Testing Setups

With standard RS-232C and RS-485 communication interfaces and Modbus RTU protocol support, the power supply can be integrated into compatible PLC-based, host-computer-based, and automated testing systems.

It supports programmable AC output control as part of a larger testing setup, helping users establish repeatable voltage and frequency conditions for product pre-compliance evaluation.

Why Choose This Programmable AC Power Supply?

This programmable AC variable frequency power supply combines adjustable 0.1–300V output, a 45–400Hz frequency range, three groups of parameter preset storage, and standard RS-232C / RS-485 communication interfaces in one desktop unit.

With three capacity options — Model 1 (350VA), Model 2 (500VA), and Model 3 (1KVA) — users can select a suitable output capacity according to the power requirements of different electronic products and pre-compliance testing setups.

The 50Hz / 60Hz quick selection function, multi-level overload protection, comprehensive protection mechanisms, voltage soft start, and Modbus RTU communication support make this series suitable for product compliance pre-testing, AC input condition verification, laboratory evaluation, and programmable AC power applications.

By providing adjustable AC voltage and frequency conditions, this series helps engineers perform preliminary power input and operating condition checks before formal compliance testing. It is a programmable AC power source for supporting pre-testing workflows, not a standalone certification or compliance measurement instrument.