500kV AC Hipot Test System | VS-W250-500
Product Details
VS-W250-500 Partial Discharge Free AC Withstand Voltage Test System is engineered to meet the stringent requirements of modern high-voltage insulation testing and partial discharge measurement. Utilizing advanced SF6 gas-insulated transformer technology, the system eliminates the environmental risks associated with traditional oil-immersed test transformers while providing superior insulation performance and long-term operational reliability.
Designed for testing transformers, GIS switchgear, power cables, bushings, insulators, reactors, and other high-voltage apparatus, the system combines a high-voltage test transformer, coupling capacitor, voltage divider, current limiting reactor, low-voltage compensation reactor, isolation transformer, and intelligent control console into a complete testing platform.
The complete testing system maintains a partial discharge level of ≤5pC under rated voltage conditions, making it suitable for factory acceptance testing, type testing, routine insulation verification, and research applications requiring ultra-low partial discharge performance. The output waveform distortion remains below 2%, ensuring accurate and repeatable test results that comply with international testing standards.
The integrated low-voltage compensation reactor significantly reduces power demand while improving system efficiency. Multiple compensation stages allow precise adjustment of reactive power, enabling stable voltage output even under demanding testing conditions.
The control console provides reliable voltage regulation and monitoring functions, allowing operators to perform withstand voltage testing safely and efficiently. Combined with high-voltage overvoltage protection, current-limiting protection, and discharge protection measures, the system ensures maximum safety during high-voltage testing procedures.
With its 500kV output capability, high testing capacity, and excellent partial discharge performance, the VS-W250-500 is an ideal solution for utilities, manufacturers, and laboratories involved in high-voltage equipment testing and insulation evaluation.
Specification
| System Specifications | |
| Parameter | Specification |
| Rated Capacity | 250kVA |
| Input Power Supply | Single Phase AC 380V, 50Hz |
| Rated Output Voltage | 500kV |
| Rated Output Current | 0.5A |
| Working Frequency | 50Hz |
| Output Waveform | Pure Sine Wave |
| Waveform Distortion | ≤2% |
| System Noise | ≤50dB |
| Short Circuit Impedance | ≤10% |
| Partial Discharge Level | ≤5pC |
| Continuous Operation | 30 Minutes |
| Overvoltage Capability | 110% Rated Voltage for 1 Minute |
| Protection Functions | Overvoltage & Overcurrent Protection |
| High Voltage Test Transformer | Automatic Control Console | |||
| Parameter | Specification | Parameter | Specification | |
| Rated Capacity | 250kVA | Rated Capacity | 50kVA | |
| Input Voltage | 0–1000V | Power Supply | AC380V | |
| Output Voltage | 500kV | Output Voltage | 0–400V | |
| Output Current | 0.5A | Rated Current | 125A | |
| Instrument Voltage | 100V | Operating Mode | Manual Control | |
| Insulation Medium | SF6 Gas | Continuous Operation | 30 Minutes | |
| Transformer Type | Partial Discharge Free | |||
| Low Voltage Compensation Reactor | |
| Parameter | Specification |
| Rated Capacity | 200kvar |
| Rated Voltage | 1kV |
| Compensation Accuracy | ±5kvar |
| Adjustment Method | Motorized Switching |
| Regulation Method | Multi-Tap Compensation |
| Fixed Reactors | 50kvar + 100kvar |
| Adjustable Reactor | 50kvar, 5 Steps |
| Compensation Step | 10kvar per Step |
| Isolation Transformer | |
| Parameter | Specification |
| Rated Capacity | 50kVA |
| Input Voltage | 0.4kV |
| Output Voltage | 1kV |
| Rated Current | 50A / 125A |
| Filtering Attenuation | ≥40dB (40kHz–100kHz) |
| Filtering Attenuation | ≥60dB (100kHz–2MHz) |
| Insulation Strength | 3kV / 1 Minute |
| High Voltage Divider | |
| Parameter | Specification |
| Rated Voltage | 500kV |
| Capacitance | 50pF |
| Divider Ratio | 5000:01:00 |
| Measurement Accuracy | Class 1.0 |
| Dielectric Loss | tgσ ≤0.5% |
| Coupling Capacitor | |
| Parameter | Specification |
| Rated Voltage | 500kV |
| Capacitance | 150pF |
| High Voltage Current Limiting Reactor | |
| Parameter | Specification |
| Rated Voltage | 500kV |
| Inductance | 100mH |
For different testing requirements, Weshine provides a complete range of AC Hipot Tester solutions covering laboratory, manufacturing, utility, and field testing applications.
How the System Works
The system utilizes an integrated modular design where all components collaborate seamlessly to establish a closed-loop testing ecosystem:
-
Isolation Transformer: First, it filters out high-frequency surges and line-side interference from the power source (achieving a filtering attenuation of ≥ 60dB at 100kHz–2MHz), ensuring a clean and stable power supply input.
-
Intelligent Control Console: Operators adjust the input voltage via the console, which drives the SF₆ Gas-Insulated Partial Discharge Free Test Transformer to step up and generate a power-frequency AC high voltage of up to 500kV.
-
Low-Voltage Compensation Reactor: It performs real-time reactive power compensation against the capacitive load of the test object. This significantly reduces the reactive power demand on the grid and minimizes input power capacity requirements.
-
High-Voltage Divider & Coupling Capacitor: During testing, the High-Voltage Divider continuously and precisely monitors the output voltage (Class 1.0 accuracy), while the Coupling Capacitor captures highly sensitive, real-time partial discharge (PD) signals.
-
High-Voltage Current-Limiting Reactor: Connected in series with the output terminal, it instantly restricts the short-circuit current in the event of a test object flashover or breakdown, protecting the entire test system from transient overvoltage shocks.
Application Scenarios
- Power Utility Companies: Used for insulation verification, commissioning tests, and maintenance of transformers, GIS equipment, switchgear, and substation assets.
- Transformer Manufacturers: Suitable for routine testing, factory acceptance testing (FAT), and type testing of power transformers and distribution transformers.
- High Voltage Laboratories: Provides ultra-low partial discharge testing capabilities for certification, research, and development applications.
- Research Institutes and Universities: Supports insulation research, dielectric studies, and high-voltage engineering education.
- Industrial and Mining Enterprises: Used for preventive maintenance and insulation condition assessment of critical electrical infrastructure.
Testing Applications
- Power Transformer Testing
- GIS Partial Discharge Testing
- AC Withstand Voltage Testing
- High Voltage Switchgear Testing
- Bushing Testing
- Power Cable Testing
- Insulator Testing
- Factory Acceptance Testing (FAT)
- Type Testing and Certification
- High Voltage Research Applications
Complete High Voltage Testing Solution
As part of Weshine's high-voltage testing portfolio, the VS-W250-500 works together with professional High Voltage Tester solutions to provide comprehensive testing capabilities for modern power systems.
The system combines ultra-high-voltage output capability, SF6 gas insulation technology, partial discharge measurement, intelligent control, and advanced protection functions to meet the requirements of utilities, manufacturers, and research institutions worldwide.
Weshine Advantages
Weshine Electric specializes in the development and manufacturing of high-voltage testing equipment 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, precise voltage measurement, and reliable protection mechanisms. Designed to meet the requirements of utilities, manufacturers, laboratories, and research institutions, Weshine solutions provide accurate, safe, and efficient testing for modern high-voltage power equipment.