PD Free AC Series Resonant Test System

The PD free AC series resonant test system is a precision test device specially designed for high voltage electrical equipment. It operates based on the principle of series resonance. By adjusting the capacitance and inductance values, the circuit can achieve a resonant state at a specific frequency, thereby generating a high voltage on the device under test.

As a professional PD free AC series resonant test system supplier, our company has been dedicated to the design and manufacturing of partial discharge-free resonant equipment for over 22 years.Has a good reputation in the industry.

Main components of the device: variable frequency power supply, excitation transformer, compensation reactor, non partial discharge capacitive voltage divider, high-voltage resonant reactor, capacitive voltage divider, partial discharge tester, accessories

1. Partial discharge and induction withstand voltage test for power transformers of 220kV/240MVA (low voltage 35kV, 10.5kV, no-load loss not exceeding 150kW) and below.

2. AC withstand voltage test for electrical equipment such as 220kV GIS, test frequency 30-300Hz, test voltage not exceeding 495kV, test time 1 minute.

3. AC withstand voltage test for 220kV/1200mm2 cable 0.7km, capacitance ≤0.1253uF, test frequency 30-300Hz, test voltage 216kV, test time 60min.

High Power Stable Output
The rated capacity of the variable frequency power supply of the PD free AC series resonant test system is up to 300kW, which can output energy stably.

High Quality Sine Wave Output
The output of the PD free AC series resonant test system is a sine wave with a waveform distortion rate of ≤1.0%, which can reduce the risk of electrical damage to the equipment and ensure stable operation of the equipment.

Strong Operation Durability
The PD free AC series resonant test system can run continuously for ≥60 minutes at rated capacity, which can meet the needs of large-scale equipment testing and long-term industrial production operation.

High Power Stable Output

The rated capacity of the variable frequency power supply of the PD free AC series resonant test system is up to 300kW, which can output energy stably.

High Quality Sine Wave Output

The output of the PD free AC series resonant test system is a sine wave with a waveform distortion rate of ≤1.0%, which can reduce the risk of electrical damage to the equipment and ensure stable operation of the equipment.

Strong Operation Durability

The PD free AC series resonant test system can run continuously for ≥60 minutes at rated capacity, which can meet the needs of large-scale equipment testing and long-term industrial production operation.

This test system is suitable for:

1. Induction withstand voltage and partial discharge test of power transformers.

2. AC withstand voltage and partial discharge tests for transformers and other equipment.

3. AC voltage withstand test for power cables.

4. AC withstand voltage test for GIS composite electrical appliances.

5. GIS composite electrical AC withstand voltage test.

6. Suitable for power frequency withstand voltage test of large generator sets.

7. Suitable for power supply for large-scale ground grid testing.

1. Rated capacity of variable frequency power supply: 300kW

2. Rated voltage: 500kV

3. Rated current: 8A

4. Rated working input power supply: 380V ± 15% (three-phase); 50Hz;

5. The output voltage waveform is a sine wave: waveform distortion rate ≤ 1.0%

6. Adjustable output frequency range: 30~300Hz. When the frequency is adjusted within the set range, the voltage remains constant for output

7. Output frequency resolution: 0.01Hz

8. Output frequency instability: ≤ 0.05%

9. Partial discharge capacity of the system: ≤ 10pC

10. System allowable running time: The allowable running time under rated capacity is ≥ 60 minutes

11. Insulation level: withstand voltage for 1 minute at 1.2 times the rated voltage.

Noise level: ≤ 80dB

In The Power Industry
In the power industry, the PD free AC series resonant test system is mainly used for insulation performance testing and evaluation of power equipment. The system applies high voltage to detect the insulation performance of the equipment under high voltage and determine whether there are defects in the insulation material. Its specific functions include partial discharge monitoring, data acquisition and analysis, automated testing, and safety protection functions.

In The Electrical Equipment Manufacturing Industry
In the electrical equipment manufacturing industry, the PD free AC series resonant test system is used for insulation performance testing of newly manufactured power equipment such as transformers, cables, switchgear, etc.

 

What type of excitation power supply is used?

UHV uses advanced variable-frequency power supplies featuring:

IGBT inverter technology

Digital frequency control

Stable output performance

High efficiency

Energy-saving operation

What types of reactors are available?

Depending on the application, UHV can provide:

Dry-type reactors

Epoxy-cast reactors

High-insulation reactor designs

These reactors are known for low losses, long service life, and dependable performance.

Can the PD Free AC Series Resonant Test System be customized?

Certainly.

UHV can tailor solutions to meet specific project requirements, including:

Special voltage ratings

Customized capacity configurations

Extended frequency ranges

Mobile testing systems

Containerized high-voltage laboratories

Integrated high-voltage testing platforms

How long does installation and commissioning take?

The schedule depends on system size:

Small systems: approximately 1–3 days

Medium systems: approximately 3–7 days

Large EHV/UHV systems: approximately 1–3 weeks

UHV engineers provide complete installation, commissioning, and acceptance support.

Do you provide calibration and certification documents?

Yes.

UHV can provide:

Factory test reports

Calibration reports

Traceable calibration certificates

Optional third-party calibration services

These documents help customers meet quality assurance and compliance requirements.

What after-sales support does UHV provide?

UHV offers comprehensive support throughout the equipment lifecycle, including:

Technical consultation

Remote troubleshooting

Software updates and upgrades

Spare parts supply

On-site technical service

Operator training

Preventive maintenance guidance

Long-term technical support

Our goal is to help customers maintain reliable system performance and maximize the value of their investment.

We are a professional PD Free AC Series Resonant Test System manufacturers/Resonant Test Set manufacturers in China.We can provide the best professional PD Free AC Series Resonant Test System for sales and competitive price. If you are looking for PD Free AC Series Resonant Test System supplier, we are a good choice.
Contact us to get Resonant Test Set price.

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