270kVA 108kV Series Resonance Test System | VS-CLXZ270-108
Products Details
VS-CLXZ270-108 270kVA 108kV Series Resonance Test System is specifically developed for field and laboratory AC withstand voltage testing of medium- and high-voltage electrical equipment. By utilizing the principle of series resonance, the system produces high-voltage output while significantly reducing the required input power, improving testing efficiency and reducing operating costs.
The complete system consists of a variable frequency power supply, dual excitation transformers, eight dry-type high-voltage reactors, a capacitive voltage divider, a compensation capacitor, and dedicated connection cables. Through flexible series and parallel combinations of the reactors, the system can accommodate a wide range of test objects including long-distance XLPE power cables, power transformers, switchgear, and instrument transformers.
The intelligent frequency converter automatically locates the resonance point and maintains stable resonance throughout the testing process. Operators can choose between automatic, semi-automatic, and manual operating modes according to field requirements. Real-time monitoring of voltage, current, frequency, resonance status, and test duration ensures accurate and repeatable test results.
The system provides excellent electrical performance with waveform distortion below 1%, resonance quality factor Q ≥ 30, and output frequency adjustable from 30Hz to 300Hz. Built-in automatic voltage stabilization maintains test voltage stability within 1.0%, ensuring reliable testing performance even under changing load conditions.
Designed for demanding field applications, the equipment features multiple protection functions including overvoltage, overcurrent, flashover, detuning, undervoltage, zero-position interlock, and emergency stop protection. The rugged aluminum enclosure and shock-resistant structure ensure reliable operation during transportation and on-site testing.
Specification
| System Specifications | |
| Parameter | Specification |
| Rated Capacity | 270kVA |
| Input Power Supply | Single Phase 220V / Three Phase 380V, 50Hz |
| Rated Output Voltage | 27kV / 54kV / 108kV |
| Rated Output Current | 10A / 5A / 2.5A |
| Frequency Range | 30Hz – 300Hz |
| Output Waveform | Pure Sine Wave |
| Waveform Distortion | ≤1% |
| Resonance Quality Factor | Q ≥ 30 |
| Measurement Accuracy | Class 1.5 |
| Continuous Operation Time | 60 Minutes |
| Overvoltage Capability | 110% Rated Voltage for 1 Minute |
| Temperature Rise | ≤65K |
| Noise Level | ≤50dB |
| Protection Functions | Overvoltage, Overcurrent, Flashover, Detuning, Undervoltage, Emergency Stop |
| High Voltage Reactors | |
| Parameter | Specification |
| Quantity | 8 Units |
| Rated Capacity | 33.75kVA Each |
| Rated Voltage | 27kV |
| Rated Current | 1.25A |
| Inductance | 100H |
| Quality Factor | Q ≥ 30 |
| Structure | Dry-Type |
| Weight | Approx. 42kg Each |
| Variable Frequency Power Supply | |
| Parameter | Specification |
| Model | MSXB-F-15kW |
| Rated Power | 15kW |
| Input Voltage | 220V / 380V |
| Output Voltage | 0 – 400V |
| Rated Input Current | 37.5A |
| Rated Output Current | 37.5A |
| Frequency Range | 30Hz – 300Hz |
| Frequency Resolution | ≤0.1Hz |
| Frequency Stability | 0.10% |
| Voltage Resolution | 0.01kV |
| Measurement Accuracy | 1.50% |
| Data Storage | 50 Test Records |
| Weight | Approx. 18kg |
| Excitation Transformer | |
| Parameter | Specification |
| Quantity | 2 Units |
| Rated Capacity | 7.5kVA Each |
| Input Voltage | 0 – 400V |
| Output Voltage | 1.5kV / 3kV / 6kV |
| Structure | Dry-Type |
| Weight | Approx. 60kg Each |
| Capacitive Voltage Divider | |
| Parameter | Specification |
| Rated Voltage | 110kV |
| Capacitance | 1000pF |
| Divider Ratio | 1500:01:00 |
| Accuracy | Class 1.0 |
| Dielectric Loss | tgσ ≤0.5% |
| Weight | Approx. 15kg |
| Compensation Capacitor | |
| Parameter | Specification |
| Rated Voltage | 70kV |
| Capacitance | 10000pF |
| Weight | Approx. 15kg |
How the System Works
The system generates an adjustable frequency output through the variable frequency power supply and dual excitation transformers. By changing the operating frequency, the inductive reactance of the reactors matches the capacitive reactance of the test object, creating a series resonance condition.
At resonance, high voltage is generated across the test object while only a small amount of power is drawn from the power source. This significantly improves testing efficiency and minimizes power requirements. The intelligent controller continuously tracks the resonance point and automatically adjusts the operating frequency to maintain stable resonance conditions throughout the test. This operating principle is commonly applied in advanced AC DC Hipot Test Set solutions for electrical insulation verification.
Features
- Variable frequency series resonance technology
- Rated capacity up to 270kVA
- Maximum output voltage up to 108kV
- Output frequency range from 30Hz to 300Hz
- Output waveform distortion ≤1%
- Automatic resonance point searching
- Automatic frequency tracking and stabilization
- Automatic, semi-automatic, and manual operation modes
- Eight dry-type high-voltage reactors
- Dual excitation transformer design
- Automatic voltage stabilization function
- Voltage stability up to 1.0%
- Large touchscreen display interface
- Real-time voltage and frequency curve display
- Data storage for up to 50 test records
- USB data export and printing support
- Comprehensive protection system
- Portable and field-friendly structure
Application Scenarios
- Power Cable Testing: Suitable for AC withstand voltage testing of 35kV XLPE cables up to 2km and 10kV cables up to 5km.
- Power Transformer Testing: Used for insulation verification and dielectric testing of 10kV and 35kV power transformers.
- Switchgear Testing: Provides AC withstand voltage testing for high-voltage switchgear and circuit breakers.
- CT and PT Testing: Ideal for current transformer and voltage transformer insulation testing.
- Substation Commissioning: Widely used for acceptance testing of newly installed electrical equipment before energization.
- Preventive Maintenance Programs: Supports periodic insulation assessment to improve equipment reliability and reduce unexpected failures. These applications require reliable High Voltage Test Equipment to ensure accurate measurement and safe operation.
Test Applications
- XLPE Power Cable AC Withstand Voltage Testing
- Power Transformer Testing
- Distribution Transformer Testing
- High Voltage Switchgear Testing
- Current Transformer Testing
- Voltage Transformer Testing
- Substation Commissioning Tests
- Preventive Maintenance Testing
- Factory Acceptance Testing (FAT)
- Electrical Equipment Insulation Evaluation
Weshine Advantages
Weshine Electric specializes in the development and manufacturing of high-voltage testing equipment and resonance testing systems. The VS-CLXZ Series Variable Frequency Series Resonance Test Systems combine advanced resonance technology, intelligent frequency control, automatic tuning, and comprehensive safety protection. Designed for utilities, electrical contractors, manufacturers, and testing laboratories, Weshine solutions provide accurate, efficient, and reliable AC withstand voltage testing for modern power systems. As an experienced Electrical Testing Equipment provider, Weshine supports customers with professional testing solutions for various power system applications.