VS-CLXZ540-270 Variable Frequency Series Resonance Test System
Products Details
The VS-CLXZ540-270 Variable Frequency Series Resonance Test System is designed for high-voltage AC withstand voltage testing of electrical equipment used in power generation, transmission, distribution, and industrial applications. By utilizing the principle of series resonance, the system significantly reduces the required input power while generating stable high-voltage output, making it ideal for field and laboratory testing.
The complete system consists of a 30kW variable frequency power supply, two excitation transformers, ten dry-type high-voltage reactors, a capacitive voltage divider, a compensation capacitor, and dedicated connection cables. The modular reactor design allows flexible series and parallel configurations to match different test objects and capacitance ranges.
The intelligent controller automatically searches for and maintains the resonance point throughout the testing process. Automatic, semi-automatic, and manual operating modes provide maximum flexibility for different testing 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 less than 1%, resonance quality factor Q ≥ 30, and adjustable output frequency from 30Hz to 300Hz. Automatic voltage stabilization maintains output voltage within ±1.0%, ensuring reliable testing under varying load conditions.
Designed for demanding field applications, the equipment incorporates multiple protection mechanisms including overvoltage protection, overcurrent protection, flashover protection, detuning protection, undervoltage protection, zero-position interlock, and emergency stop functions. The rugged dry-type design and shock-resistant structure ensure long-term reliability and easy transportation.
| System Specifications | |
| Parameter | Specification |
| Rated Capacity | 540kVA |
| Input Power Supply | Single Phase 220V / Three Phase 380V, 50Hz |
| Rated Output Voltage | 54kV / 135kV / 270kV |
| Rated Output Current | 10A / 4A / 2A |
| Frequency Range | 30Hz – 300Hz |
| Output Waveform | Pure Sine Wave |
| Waveform Distortion | ≤1% |
| Resonance Quality Factor | Q ≥ 30 |
| Measurement Accuracy | Class 1.5 |
| Continuous Operating 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 | 10 Units |
| Rated Capacity | 54kVA Each |
| Rated Voltage | 27kV |
| Rated Current | 2A |
| Inductance | 55H |
| Quality Factor | Q ≥ 30 |
| Structure | Dry-Type |
| Weight | Approx. 64kg Each |
| Variable Frequency Power Supply | |
| Parameter | Specification |
| Model | MSXZ-F-30kW |
| Rated Power | 30kW |
| Input Voltage | 220V / 380V |
| Output Voltage | 0 – 400V |
| Rated Input Current | 75A |
| Rated Output Current | 75A |
| 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. 32kg |
| Excitation Transformer | |
| Parameter | Specification |
| Quantity | 2 Units |
| Rated Capacity | 15kVA Each |
| Input Voltage | 0 – 400V |
| Output Voltage | 4kV / 8kV / 16kV |
| Structure | Dry-Type |
| Weight | Approx. 115kg Each |
| Capacitive Voltage Divider | |
| Parameter | Specification |
| Rated Voltage | 270kV |
| Capacitance | 1000pF |
| Divider Ratio | 3000:01:00 |
| Accuracy | Class 1.0 |
| Dielectric Loss | tgσ ≤0.5% |
| Weight | Approx. 55kg |
| Compensation Capacitor | |
| Parameter | Specification |
| Rated Voltage | 160kV |
| Capacitance | 5000pF |
| Weight | Approx. 35kg |
Product Guide
How the System Works
The system generates an adjustable-frequency output through the variable frequency power supply and excitation transformers. By adjusting the operating frequency, the inductive reactance of the reactors matches the capacitive reactance of the test object, creating a series resonance condition.
At resonance, the system can generate high AC test voltage while requiring only a small amount of input power. The intelligent controller continuously tracks and maintains the resonance point, ensuring stable output voltage and accurate testing performance throughout the entire test process.
Features
1、Variable frequency series resonance technology
2、Rated capacity up to 540kVA
3、Maximum output voltage up to 270kV
4、Output frequency range from 30Hz to 300Hz
5、Output waveform distortion ≤1%
6、Automatic resonance point searching
7、Automatic frequency tracking and stabilization
8、Automatic, semi-automatic, and manual operation modes
9、Ten dry-type high-voltage reactors
10、Dual excitation transformer configuration
11、Automatic voltage stabilization function
12、Voltage stability up to ±1.0%
13、Large touchscreen operation interface
14、Real-time voltage and frequency curve display
15、Data storage for up to 50 test records
16、USB data export and printing support
17、Low noise level ≤50dB
18、Comprehensive safety protection system
Application Scenarios
Power Cable Testing
Suitable for AC withstand voltage testing of 110kV power cables up to 1km, 35kV power cables up to 4km, and 10kV power cables up to 8km.
Power Transformer Testing
Used for insulation verification and dielectric testing of 35kV and 110kV power transformers.
GIS and Switchgear Testing
Provides AC withstand voltage testing for GIS equipment, circuit breakers, and high-voltage switchgear.
CT and PT Testing
Ideal for current transformer and voltage transformer insulation testing.
Substation Commissioning
Widely used for commissioning and acceptance testing of newly installed electrical equipment.
Preventive Maintenance Programs
Supports routine insulation condition assessment and predictive maintenance programs.
Applications
1、110kV Power Cable AC Withstand Voltage Testing
2、35kV XLPE Cable Testing
3、10kV Power Cable Testing
4、Power Transformer Testing
5、GIS Testing
6、High Voltage Switchgear Testing
7、Current Transformer Testing
8、Voltage Transformer Testing
9、Substation Commissioning Tests
10、Factory Acceptance Testing (FAT)
Weshine Advantages
Weshine Electric is a professional manufacturer of high-voltage testing equipment and resonance testing systems. Our VS-CLXZ Series Variable Frequency Series Resonance Test Systems combine advanced resonance technology, intelligent frequency control, automatic tuning functions, and comprehensive safety protection. Designed for utilities, EPC contractors, transformer manufacturers, testing laboratories, and industrial users, Weshine solutions provide accurate, efficient, and reliable AC withstand voltage testing for modern power systems.