0-300V 45-400Hz 15kVA 10kVA 5-20kVA Variable

Frequency AC Power Source for Transformer Testing

Adjustable AC Excitation Source for Transformer Testing and Evaluation

Transformer testing often requires a controlled AC source to energize the primary winding and establish specific input voltage and frequency conditions. The 5-20kVA Variable Frequency AC Power Source provides adjustable AC output for transformer development, energization evaluation, and production testing.

With an adjustable output voltage of up to 300V AC and a variable frequency range specified from 45Hz to 400Hz, this power source allows engineers to configure different input conditions for compatible transformers. It can be used as the AC excitation source in testing setups where external instruments monitor the transformer's secondary-side voltage and other electrical characteristics.

Available in four capacity options — 5kVA, 10kVA, 15kVA, and 20kVA — the series provides flexibility for different transformer testing requirements. A 7-inch color touchscreen, voltage and frequency presets, online adjustment, power-off memory, and voltage ramp function make it suitable for laboratory evaluation and transformer production environments.

Key Features

1. Adjustable Primary-Side AC Excitation

Supplies adjustable AC power to the primary winding of compatible transformers. Engineers can select the input voltage according to the transformer's rated primary voltage and establish controlled energization conditions during transformer evaluation.

2. Variable Voltage and Frequency for V/F Condition Evaluation

Allows independent adjustment of output voltage and frequency to establish different AC input conditions. This is useful when evaluating compatible transformers at different operating points. Engineers should follow the transformer's rated voltage-to-frequency requirements to avoid excessive core flux and potential magnetic saturation.

3. 45–400Hz Frequency Adjustment

Provides adjustable output frequency within the supported operating range. This is particularly useful for transformer evaluation procedures that require input frequencies other than the standard 50Hz or 60Hz, provided the transformer is designed for the selected frequency.

4. Four Power Ratings for Different Transformer Sizes

Available in 5kVA, 10kVA, 15kVA, and 20kVA models. Users can select a power capacity based on the transformer's rated apparent power, excitation requirements, and expected input current.

5. Standard Sine Wave Output

Provides a standard sine wave AC output for supplying compatible transformers. The specified total harmonic distortion is ≤2% under resistive load conditions, providing a reference specification for the power source. Actual waveform performance under transformer loads depends on the operating conditions and should be verified when required.

6. Voltage Ramp for Controlled Transformer Energization

The voltage ramp function gradually increases the output voltage toward the selected setting. It provides a controlled voltage rise during transformer energization and allows engineers to observe the transformer's response as the input voltage increases.

7. Real-Time AC Output Parameter Display

The 7-inch color touchscreen displays output voltage, current, power, frequency, and power factor. These readings help engineers monitor the electrical conditions supplied to the transformer during an evaluation procedure. They represent the power source's output parameters rather than direct measurements of transformer winding characteristics.

8. Preset Settings for Repeated Transformer Tests

Users can preset output voltage and frequency parameters and adjust them online during operation. The power-off memory function retains the previous output mode and parameter settings, helping maintain convenient setup conditions for repeated transformer testing procedures.

9. Protection Functions for Testing Operation

The power supply provides overload, overcurrent, overvoltage, overheating, and short-circuit protection. When a protection condition occurs, an alarm and corresponding fault code are displayed to help users identify the event.

Applications

1. Transformer Primary Winding Energization

Provides adjustable AC power to the primary winding of compatible transformers. Engineers can establish the required input voltage and monitor the transformer's energization behavior using appropriate external measuring instruments.

2. Transformer Input Voltage Variation Testing

Allows engineers to change the AC input voltage to evaluate transformer behavior under selected voltage conditions. This can be used during design verification and input voltage tolerance evaluation, provided the selected conditions remain within the transformer's specified operating limits.

3. Transformer Frequency Response Evaluation

Provides adjustable input frequency conditions for transformers designed to operate at different frequencies. Engineers can compare the transformer's secondary-side response under selected input frequencies using external voltage and electrical measuring instruments.

4. Transformer V/F Operating Condition Evaluation

Supports the establishment of different voltage and frequency combinations for compatible transformer evaluation. This is useful for examining operating conditions associated with different V/F ratios while observing the transformer with suitable external instruments.

5. Transformer Production Energization Testing

Can be integrated into transformer production testing stations as an adjustable primary-side AC supply. Preset voltage and frequency parameters help establish repeatable input conditions for routine energization and production inspection procedures.

6. Transformer Aging and Power Cycling Evaluation

Provides AC input power for compatible transformer aging evaluation setups. The aging impact mode offers an operating option for procedures involving specified power-on and power-off conditions, according to the testing requirements and equipment ratings.

7. Transformer Secondary-Side Voltage Observation

Can serve as the input power source in a transformer testing arrangement where external instruments are connected to the secondary side. Engineers can observe secondary voltage changes under selected primary-side input conditions using suitable measurement equipment.

Quality Check and Terms of Service:

• Each unit is inspected before shipment.

• Standard accessories and product documentation are supplied according to the package configuration.

• Please confirm the transformer's rated capacity, primary voltage, rated frequency, and expected excitation current before ordering.

• The 0–600V output is a customized option and must be confirmed before purchase.

• Select the appropriate power supply capacity according to the transformer rating and expected startup or magnetizing current.

• Confirm that the selected output voltage and frequency are compatible with the transformer's rated V/F requirements.

• Use appropriate external measuring instruments for secondary voltage, winding resistance, turns ratio, insulation resistance, and other transformer-specific measurements.

• Contact our customer support team if you need assistance confirming model specifications or product configuration.

Technical Specifications

Model Selection and Dimensions

Important Notes:

• All four models in this product listing use single-phase AC input.

• The standard output voltage is listed as 0–300V AC. The 0–600V AC configuration is a customized option and requires confirmation before ordering.

• THD ≤2% is specified under resistive load conditions.

• The 45–400Hz frequency range should be confirmed for the selected capacity before purchase, particularly for the 20kVA model.

• Actual output current and available power depend on the selected model, output voltage, and load conditions.

• Transformer magnetizing current and energization inrush current should be considered when selecting the power supply capacity.

• The transformer's rated voltage and frequency must be observed when setting output voltage and frequency. An unsuitable V/F ratio may cause excessive core flux and magnetic saturation.

• This product provides adjustable AC excitation power. It does not independently measure transformer turns ratio, winding resistance, insulation resistance, or core and copper losses.

• Please confirm the required input current, wiring, and circuit breaker capacity before installation.

• Communication interfaces and protocols are not listed as standard features because their availability and configuration have not been confirmed.

Why Choose This 5-20kVA Variable Frequency AC Power Source?

A suitable AC excitation source is an important part of transformer development and testing. Engineers need to establish controlled primary-side voltage and frequency conditions before observing the transformer's secondary-side response and other electrical characteristics.

This variable frequency AC power source combines adjustable voltage, variable frequency, four capacity options, voltage ramp, preset parameters, and output parameter monitoring in one system.

From primary winding energization and V/F condition evaluation to transformer production inspection and aging procedures, it provides a flexible AC input source for compatible transformers and professional electrical testing setups.