Product Overview
The JDX-10 voltage transformer is an indoor oil-immersed single-phase measurement device designed for 10kV medium-voltage distribution systems. This advanced voltage transformer features three separate windings with different accuracy classes, providing comprehensive voltage measurement for metering, control, and protection applications.
The JDX-10 delivers precise voltage measurement with 0.2 class winding for energy metering, 0.5 class winding for control systems, and residual voltage winding for zero-sequence protection. The oil-immersed construction ensures excellent dielectric strength and thermal performance, while the single-phase design with large capacity and high precision meets demanding industrial requirements.
Product Display
Application Position
The JDX-10 is installed in indoor switchgear, substations, and distribution networks where reliable single-phase voltage measurement is required. The oil-immersed insulation provides excellent dielectric strength and thermal dissipation for continuous indoor operation. Three-winding configuration accommodates metering, control, and protection system requirements simultaneously.
Main Applications
- 10kV indoor distribution networks
- Substations requiring voltage measurement
- Industrial facilities with medium-voltage supply
- Energy metering applications (0.2 class)
- Control system voltage monitoring (0.5 class)
- Zero-sequence protection (residual winding)
Application Case Studies
Application Scenario 1: Substation Comprehensive Measurement
Utilities deploy the JDX-10 oil-immersed voltage transformer in 10kV indoor substations for comprehensive voltage measurement. The three-winding configuration provides 0.2 class output for energy metering, 0.5 class output for control systems, and residual voltage output for zero-sequence protection, ensuring complete system monitoring while the oil-immersed design delivers reliable performance in indoor environments.
Application Scenario 2: Industrial Medium-Voltage Metering and Protection
Industrial facilities with 10kV incoming supply require accurate voltage measurement for energy management and protection coordination. The JDX-10 offers multiple accuracy classes to meet different measurement requirements, with large capacity (500VA limit output) for various burden conditions and three-winding configuration for enhanced system flexibility.
Application Fit
Suitable For
- Indoor 10kV voltage measurement
- Substations with comprehensive measurement requirements
- Industrial facilities with medium-voltage supply
- Energy metering applications
- Control system voltage monitoring
- Zero-sequence protection systems
Not Recommended For
- Outdoor installation applications
- Current measurement applications (use CT instead)
- High-voltage systems above 12kV (use higher voltage class models)
- Applications requiring single winding only
Installation Conditions
- Installation position: Indoor switchgear, substations, or distribution points
- Ambient temperature: -5°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Oil-immersed
- Frequency: 50Hz or 60Hz
- Connection: Single-phase with three windings
- Maintenance: Periodic oil level and quality inspection recommended
Technical Parameters
The JDX-10 is an indoor oil-immersed single-phase voltage transformer for 10kV systems. Operating temperature -5°C to +40°C, compliant with IEC and GB standards.
Model Designation
| Code | Meaning |
|---|---|
| J | Voltage transformer |
| D | Single phase |
| X | With residual voltage winding |
| 10 | Voltage grade (kV) |
VT Data
| Rated Voltage Ratio (V) |
Accuracy Class & Rated Output (VA) |
Limit Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 10000/√3 : 100/√3 : 100/√3 : 100/3 | 0.2: 20 0.5: 25 3P: 50 |
500 | 12/42/75 |
Installation
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Height 645±10mm | Bleed valve, nameplate, oil drain hole |
| Side View | Insulator height 285±5mm; Tank height 380±5mm | Secondary protection cover, terminal board |
| Top View | Diameter φ330±5mm | Circular top flange with bolt holes |
| Bottom View | Width 250mm / 290mm | Circular base dimensions |
Wiring Diagram
Installation Guidelines
- Install in indoor switchgear or substation with adequate ventilation
- Connect primary terminal A to voltage system
- Connect neutral terminal N to system ground
- Connect secondary terminals to meters, control systems, and protection devices
- Connect residual winding terminals (dn) to zero-sequence protection relay
- Verify voltage ratio matches system requirements before commissioning
- Check oil level and insulation resistance before energizing
Three-Winding Features
The JDX-10 incorporates three separate windings including:
- 0.2 class winding for high-precision energy metering (20VA)
- 0.5 class winding for control system voltage monitoring (25VA)
- Residual voltage winding for zero-sequence protection (50VA)
- Independent circuits for enhanced system reliability
Oil-Immersed Features
The JDX-10 incorporates advanced oil-immersed insulation technology including:
- Excellent dielectric strength for high-voltage applications
- Superior thermal dissipation for continuous operation
- Large capacity for various burden requirements
- Proven reliability in indoor environments
Standards
The JDX-10 oil-immersed voltage transformer complies with IEC and GB standards for voltage transformers, ensuring compatibility with international and Chinese standards for medium-voltage measurement applications.
Selection Guide
Select by system voltage: JDX-10 is designed for 10kV systems with 12/42/75kV insulation level.
Select by accuracy class: Use 0.2 for high-precision metering, 0.5 for control systems, or 3P for protection applications.
Select by rated output: Choose rated output (20-50VA) based on connected burden requirements.
Ordering Information
When ordering the JDX-10 oil-immersed voltage transformer, please specify:
- Model: JDX-10
- System voltage: 10kV
- Accuracy class: 0.2, 0.5, or 3P
- Rated output: 20, 25, or 50 VA
- Frequency: 50Hz or 60Hz
- Installation type: Indoor
- Quantity
FAQs