Product Overview
The JDJJ9-10W voltage transformer is an outdoor oil-filled type measurement device designed for 10kV medium-voltage distribution systems. This single-phase voltage transformer features advanced oil-immersed insulation technology, providing excellent dielectric strength and reliable operation in harsh outdoor environments.
The JDJJ9-10W delivers precise voltage measurement for protection and metering applications with multiple accuracy classes (0.2, 0.5, 1.0) and flexible connection configurations (Y/△ three-winding or Y/Y/△ four-winding). The oil-immersed construction ensures superior thermal performance while providing 800VA maximum output capacity. Compact design with 51kg weight simplifies installation and reduces structural support requirements.
Product Display
Application Position
The JDJJ9-10W is installed in outdoor switchgear, substations, and distribution networks where reliable voltage measurement is required. The oil-immersed insulation provides excellent dielectric strength and thermal dissipation for continuous outdoor operation. Multiple connection configurations (Y/△ or Y/Y/△) accommodate various protection and metering system requirements.
Main Applications
- 10kV outdoor distribution networks
- Substations requiring voltage measurement
- Industrial facilities with medium-voltage supply
- Protection relay voltage input
- Power quality monitoring and metering
- Applications requiring high output capacity (up to 800VA)
Application Case Studies
Application Scenario 1: Substation Voltage Measurement
Utilities deploy the JDJJ9-10W oil-filled voltage transformer in 10kV substations for protection relay input and energy metering. The Y/△ connection configuration provides both metering outputs (star-connected) and protection outputs (open delta), ensuring comprehensive system monitoring while the oil-immersed design delivers reliable performance in outdoor environments.
Application Scenario 2: Industrial Medium-Voltage Metering
Industrial facilities with 10kV incoming supply require accurate voltage measurement for power quality monitoring and protection coordination. The JDJJ9-10W offers multiple accuracy classes (0.2, 0.5, 1.0) to meet different measurement requirements, with 800VA maximum output capacity for various burden conditions and the Y/Y/△ four-winding configuration for enhanced system flexibility.
Application Fit
Suitable For
- Outdoor 10kV voltage measurement
- Substations with protection relay requirements
- Industrial facilities with medium-voltage supply
- Power quality monitoring applications
- Applications requiring high output capacity
- Environments with wide temperature variations
Not Recommended For
- Indoor-only compact switchgear applications
- Current measurement applications (use CT instead)
- High-voltage systems above 12kV (use higher voltage class models)
- Applications requiring maintenance-free dry-type design
Installation Conditions
- Installation position: Outdoor switchgear, substations, or distribution points
- Ambient temperature: -25°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Oil-immersed
- Frequency: 50Hz or 60Hz
- Connection: Y/△ (three-winding) or Y/Y/△ (four-winding)
- Maintenance: Periodic oil level and quality inspection recommended
Technical Parameters
The JDJJ9-10W is an outdoor oil-filled voltage transformer for 10kV systems. Operating temperature -25°C to +40°C, compliant with GB20840.1-2010 and GB20840.3-2013. Features oil-immersed insulation, multiple connection configurations, and high output capacity.
VT Data
| Rated Voltage (kV) |
Insulation Level (kV) |
Accuracy Class & Rated Output (VA) |
Max Output (VA) |
|---|---|---|---|
| 10/√3 : 0.1/√3 : 0.1/3 | 12/42/75 | 0.2/3P: 50/100 0.5/3P: 100/100 1.0/6P: 300/100 |
800 |
| 10/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 12/42/75 | 0.2/0.5/3P: 20/40/100 | 800 |
Installation
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Height 624±5mm; Body 336±5mm; Base 285mm (335mm total) | Nameplate on front face |
| Side View | Base 215mm (265mm total); Top M12; Side 7-M10 | Ground terminal M10 |
| Top View | 295x225mm (inner); 340x270mm (outer) | Octagonal base plate |
Weight: Approximately 51kg
Wiring Diagram
Installation Guidelines
- Install in outdoor switchgear or substation with adequate ventilation
- Connect primary terminals A, B, C to three-phase system
- Connect neutral terminal N to system ground
- Secondary terminals provide voltage output to meters and protection devices
- Ensure proper grounding of secondary circuit neutral point
- Verify voltage ratio matches system requirements before commissioning
- Check oil level and insulation resistance before energizing
- For Y/△ connection, connect tertiary winding in open delta for ground fault detection
Oil-Immersed Features
The JDJJ9-10W incorporates advanced oil-immersed insulation technology including:
- Excellent dielectric strength for high-voltage applications
- Superior thermal dissipation for continuous operation
- Wide temperature range operation (-25°C to +40°C)
- Proven reliability in outdoor environments
Standards
The JDJJ9-10W oil-filled voltage transformer complies with GB20840.1-2010 and GB20840.3-2013 for voltage transformers, ensuring compatibility with Chinese standards for medium-voltage measurement applications.
Selection Guide
Select by system voltage: JDJJ9-10W 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 standard metering, or 1.0 for general measurement.
Select by connection type: Choose Y/△ (three-winding) for basic applications or Y/Y/△ (four-winding) for enhanced system flexibility.
Select by rated output: Choose rated output based on connected burden requirements (up to 800VA maximum).
Ordering Information
When ordering the JDJJ9-10W oil-filled voltage transformer, please specify:
- Model: JDJJ9-10W
- System voltage: 10kV
- Accuracy class: 0.2, 0.5, or 1.0
- Rated output: Specify VA value from table
- Connection type: Y/△ (three-winding) or Y/Y/△ (four-winding)
- Frequency: 50Hz or 60Hz
- Installation type: Outdoor
- Quantity
FAQs