Partial Discharge Free AC Withstand Voltage Test System | VS-W50-250
Products Details
The VS-W50-250 Partial Discharge Free AC Withstand Voltage Test System is specifically designed to meet the increasing demand for high-voltage insulation testing and ultra-low partial discharge measurements in modern power systems. Compared with traditional oil-immersed test transformers, the system utilizes SF6 gas insulation technology, eliminating oil contamination risks while significantly reducing equipment weight by 20% to 60%.
The system achieves an overall partial discharge level of ≤5pC, while the SF6 test transformer itself maintains a partial discharge level of ≤3pC at rated voltage. These outstanding insulation characteristics make the equipment particularly suitable for partial discharge testing, factory acceptance testing, insulation verification, and high-voltage research applications.
The complete system consists of an SF6 gas-insulated test transformer, coupling capacitor, high-voltage current limiting reactor, low-voltage compensation reactor, isolation transformer, and fully automatic control console. By utilizing low-voltage compensation technology, source-side current consumption can be reduced by up to 60%, significantly improving testing efficiency and reducing power requirements.
The intelligent control system features a 7-inch color touchscreen interface supporting both automatic and manual test modes. Users can independently configure up to five test voltage stages, voltage ramp rates, and withstand durations. Automatic functions include voltage ramping, compensation switching, timing control, automatic voltage reduction, data storage, historical record management, and report printing.
Designed for reliability and safety, the system provides stable sinusoidal voltage output with waveform distortion less than 5%, low operating noise, and comprehensive protection against overvoltage and overcurrent conditions. The modular design also allows the technology platform to be expanded for ultra-high-voltage applications up to 1200kV.
| System Specifications | |
| Parameter | Specification |
| Rated Capacity | 50kVA |
| Input Power Supply | Single Phase AC 380V, 50Hz |
| Rated Output Voltage | 250kV |
| Rated Output Current | 0.2A |
| Output Waveform | Pure Sine Wave |
| Waveform Distortion | ≤5% |
| System Noise | ≤65dB |
| Short Circuit Impedance | ≤6% |
| Partial Discharge Level | ≤5pC |
| Continuous Operation | 30 Minutes |
| Overvoltage Capability | 110% Rated Voltage for 1 Minute |
| Protection Functions | Overvoltage & Overcurrent Protection |
| SF6 Test Transformer | |
| Parameter | Specification |
| Rated Capacity | 50kVA |
| Input Voltage | 0–400V |
| Rated Output Voltage | 250kV |
| Gas Insulation | SF6 |
| Working Pressure | 0.5MPa |
| Instrument Ratio | 2500:01:00 |
| Partial Discharge Level | ≤3pC |
| Current Limiting Reactor | 250kV / 100mH |
| Coupling Capacitor | 250kV / 50pF |
| Dimensions | 2180 × 900 × 2780 mm |
| Weight | 854kg |
| Automatic Control Console | |
| Parameter | Specification |
| Rated Capacity | 20kVA |
| Power Supply | AC380V |
| Output Voltage | 0–420V |
| Rated Output Current | 47A |
| Voltage Accuracy | Class 1.0 |
| Display | 7-inch Color Touchscreen |
| Voltage Ramp Rate | Adjustable |
| Test Modes | Automatic / Manual |
| Programmable Stages | 5 Voltage Stages |
| Dimensions | 1320 × 800 × 1180 mm |
| Weight | 196kg |
| Isolation Compensation Cabinet | |
| Parameter | Specification |
| Compensation Capacity | 50kvar |
| Rated Voltage | 0.4kV |
| Compensation Accuracy | ±5kvar |
| Adjustment Method | Motorized Switching |
| Compensation Steps | 5 Steps |
| Rated Current per Step | 25A |
| Isolation Transformer Capacity | 20kVA |
| Rated Current | 50A / 50A |
| Filtering Attenuation | ≥40dB (40kHz–100kHz) |
| Filtering Attenuation | ≥60dB (100kHz–2MHz) |
| Insulation Strength | 3kV / 1min |
| Dimensions | 850 × 600 × 700 mm |
| Weight | 230kg |
Product Guide
The system generates a stable power-frequency high voltage through the SF6 gas-insulated test transformer. During testing, the coupling capacitor continuously monitors partial discharge activity while the automatic control console manages voltage ramping, compensation switching, timing, and voltage reduction.
The low-voltage compensation reactor automatically optimizes reactive power compensation, minimizing power supply current requirements and improving system efficiency. Automatic and manual testing modes allow users to perform insulation withstand tests and partial discharge measurements according to international testing standards.
Application Scenarios
- Power Utility Companies: Used for commissioning, maintenance, and insulation verification of transformers, GIS equipment, switchgear, and substation assets.
- High Voltage Laboratories: Suitable for type testing, routine testing, and research projects requiring ultra-low partial discharge performance.
- Transformer Manufacturers: Ideal for factory acceptance testing, insulation verification, and quality control during transformer production.
- Universities and Research Institutes: Supports high-voltage engineering research, insulation studies, and educational laboratory applications.
- Industrial and Mining Enterprises: Provides preventive maintenance and condition assessment for critical electrical infrastructure.
Features
- SF6 gas-insulated transformer technology
- Oil-free design with no environmental contamination
- Complete system partial discharge level ≤5pC
- Transformer partial discharge level ≤3pC
- Rated output voltage up to 250kV
- Rated capacity 50kVA
- Reactive power compensation reduces input current by up to 60%
- Automatic and manual testing modes
- Five-stage programmable voltage and timing settings
- Adjustable voltage ramp rate
- Intelligent voltage regulation and compensation switching
- Historical data storage and report printing
- Stable sine-wave output with distortion ≤5%
- Low operating noise ≤65dB
- High-voltage overvoltage protection
- Tail-current overcurrent protection
- Suitable for partial discharge and AC withstand voltage testing
Applications
- Transformer AC Withstand Voltage Testing
- GIS Partial Discharge Testing
- Switchgear Insulation Testing
- High Voltage Cable Testing
- Bushing Testing
- Insulator Testing
- Factory Acceptance Testing (FAT)
- High Voltage Laboratory Testing
- Electrical Equipment Type Testing
- Preventive Maintenance Programs
Weshine Advantages
Weshine Electric is a professional manufacturer of high-voltage testing equipment, ultrasonic flaw detector solutions, and partial discharge measurement systems. Our VS-W series Partial Discharge Free AC Withstand Voltage Test Systems combine advanced SF6 insulation technology, ultra-low partial discharge performance, intelligent automation, and reliable safety protection. Designed for demanding laboratory and field applications, Weshine solutions help customers improve testing accuracy, ensure regulatory compliance, and enhance long-term equipment reliability.