VS-CLXZ135-108 Variable Frequency Series Resonance Test System
Products Details
The VS-CLXZ135-108 Variable Frequency Series Resonance Test System is a professional high-voltage testing solution developed for power utilities, electrical contractors, transformer manufacturers, substations, industrial facilities, and testing laboratories. By utilizing the principle of series resonance, the system generates high test voltages with minimal input power, significantly reducing power consumption while maintaining excellent voltage stability and testing accuracy.
The complete system consists of a variable frequency power supply, excitation transformer, four high-voltage reactors, a capacitive voltage divider, compensation capacitor, and connecting cables. Through flexible series and parallel combinations of the reactors, the system can be configured to accommodate different test objects, including long-distance power cables, power transformers, switchgear, and instrument transformers.
The intelligent variable frequency controller automatically searches for the resonance point and maintains stable operation throughout the testing process. The system supports automatic, semi-automatic, and manual operating modes, allowing users to perform testing efficiently under various field conditions. Real-time monitoring of voltage, current, frequency, test duration, and resonance status ensures accurate and reliable test results.
Designed for demanding field applications, the system features a waveform distortion rate of less than 1%, resonance quality factor Q ≥ 30, and comprehensive protection against overvoltage, overcurrent, flashover, detuning, undervoltage, and emergency shutdown conditions. The dry-type reactor design and portable aluminum enclosure improve durability and simplify transportation.
With built-in data storage, automatic voltage regulation, frequency calculation functions, and USB printing support, the VS-XZ135-108 provides a complete solution for modern AC withstand voltage testing requirements.
| System Specifications | |
| Parameter | Specification |
| Rated Capacity | 135kVA |
| Input Power Supply | Single Phase 220V / Three Phase 380V, 50Hz |
| Rated Output Voltage | 27kV / 54kV / 108kV |
| Rated Output Current | 5A / 2.5A / 1.25A |
| 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 |
| Protection Functions | Overvoltage, Overcurrent, Flashover, Detuning, Undervoltage, Emergency Stop |
| High Voltage Reactors | |
| Parameter | Specification |
| Quantity | 4 Units |
| Rated Capacity | 33.75kVA Each |
| Rated Voltage | 27kV |
| Rated Current | 1.25A |
| Inductance | 100H |
| Quality Factor | Q ≥ 30 |
| Structure | Dry-Type |
| Weight | Approx. 45kg Each |
| Variable Frequency Power Supply | |
| Parameter | Specification |
| Model | MSXB-F-7.5kW |
| Rated Power | 7.5kW |
| Input Voltage | 220V / 380V |
| Output Voltage | 0 – 400V |
| Rated Current | 18.75A |
| Frequency Range | 30Hz – 300Hz |
| Frequency Resolution | ≤0.1Hz |
| Frequency Stability | 0.10% |
| Voltage Resolution | 0.01kV |
| Measurement Accuracy | 1.50% |
| Noise Level | ≤50dB |
| Data Storage | 50 Test Records |
| Weight | Approx. 12kg |
| Excitation Transformer | |
| Parameter | Specification |
| Model | MSB-7.5kVA |
| Rated Capacity | 7.5kVA |
| Input Voltage | 0 – 400V |
| Output Voltage | 1.5kV / 3kV / 6kV |
| Structure | Dry-Type |
| Weight | Approx. 59kg |
| 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 / 35kV |
| Capacitance | 10000pF / 20000pF |
| Weight | Approx. 20kg |
Product Guide
How the System Works
The Variable Frequency Series Resonance Test System generates an adjustable frequency output through the variable frequency power supply and excitation transformer. By changing the operating frequency, the inductive reactance of the high-voltage reactors matches the capacitive reactance of the test object, creating a series resonance condition.
At resonance, the system produces a high output voltage while requiring only a small input power, significantly improving testing efficiency and reducing power consumption. The controller automatically locates and maintains the resonance point throughout the test, ensuring stable voltage output and accurate test results.
Features
1、Variable frequency series resonance technology
2、Rated capacity up to 135kVA
3、Maximum output voltage up to 108kV
4、Wide frequency range from 30Hz to 300Hz
5、Output waveform distortion ≤1%
6、Automatic resonance point searching
7、Automatic frequency tracking and tuning
8、Automatic, semi-automatic, and manual operation modes
9、Real-time voltage, current, frequency, and time monitoring
10、Resonance quality factor Q ≥ 30
11、Dry-type reactor design
12、Automatic voltage stabilization function
13、Data storage for up to 50 test records
14、USB and external printer support
15、Compact and portable structure
16、Comprehensive protection system
17、Suitable for cable, transformer, switchgear, and CT/PT testing
Application Scenarios
Power Cable Testing
Suitable for AC withstand voltage testing of medium- and high-voltage XLPE power cables during commissioning and maintenance.
Power Transformer Testing
Used for dielectric and insulation testing of distribution transformers and power transformers.
Switchgear Testing
Provides AC withstand voltage testing for high-voltage switchgear, circuit breakers, and related equipment.
Current Transformer and Voltage Transformer Testing
Ideal for insulation verification and routine testing of CTs and PTs.
Substation Commissioning
Widely used for acceptance testing of newly installed electrical equipment before energization.
Preventive Maintenance Programs
Supports routine maintenance testing to evaluate insulation condition and prevent unexpected failures.
Applications
1、XLPE Power Cable AC Withstand Voltage Testing
2、Power Transformer Testing
3、Distribution Transformer Testing
4、GIS and Switchgear Testing
5、Current Transformer Testing
6、Voltage Transformer Testing
7、Substation Commissioning Tests
8、Preventive Maintenance Testing
9、Factory Acceptance Testing (FAT)
10、Electrical Equipment Insulation Evaluation
Weshine Advantages
Weshine Electric specializes in high-voltage testing equipment and resonance testing solutions. Our VS-XZ Series Variable Frequency Series Resonance Test Systems combine advanced resonance technology, intelligent frequency control, automatic tuning functions, and comprehensive protection mechanisms. Designed for utility companies, contractors, manufacturers, and laboratories, Weshine solutions deliver accurate, efficient, and reliable AC withstand voltage testing for modern power systems.