Product Overview
The JDJ-11W voltage transformer is an outdoor oil-filled type measurement device designed for 11kV 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 JDJ-11W delivers precise voltage measurement for protection and metering applications with 0.2/0.5 accuracy classes and flexible voltage ratios (10/0.1, 11/0.11, 10/0.22, 11/0.22 kV). The oil-immersed construction ensures superior thermal performance while providing 800VA maximum output capacity. Wide temperature range operation (-40°C to +40°C) makes it suitable for extreme climate conditions.
Product Display
Application Position
The JDJ-11W 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. Single-phase design with dual secondary windings accommodates various protection and metering system requirements.
Main Applications
- 11kV 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 JDJ-11W oil-filled voltage transformer in 11kV substations for protection relay input and energy metering. The dual secondary winding configuration provides both metering outputs (0.2 class) and protection outputs (0.5 class), 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 11kV incoming supply require accurate voltage measurement for power quality monitoring and protection coordination. The JDJ-11W offers multiple voltage ratios and accuracy classes to meet different measurement requirements, with 800VA maximum output capacity for various burden conditions and wide temperature range operation for extreme climate conditions.
Application Fit
Suitable For
- Outdoor 11kV voltage measurement
- Substations with protection relay requirements
- Industrial facilities with medium-voltage supply
- Power quality monitoring applications
- Applications requiring high output capacity
- Environments with extreme 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: -40°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Oil-immersed
- Frequency: 50Hz or 60Hz
- Connection: Single-phase or three-phase (V-connection)
- Maintenance: Periodic oil level and quality inspection recommended
Technical Parameters
The JDJ-11W is an outdoor oil-filled voltage transformer for 11kV systems. Operating temperature -40°C to +40°C, compliant with GB20840.3-2013 and IEC61869-3:2011. Features oil-immersed insulation, multiple voltage ratios, and high output capacity.
VT Data
| Rated Voltage (kV) |
Accuracy Class & Rated Output (VA) |
Max Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 10/0.1, 11/0.11 | 0.2: 30 VA 0.5: 50 VA |
800 | 12/42/75 |
| 10/0.22, 11/0.22 | 0.2/3P: 20/500 VA 0.5/3P: 50/500 VA |
Installation
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Height 605±10mm; Top width 355±5mm; Box 324x296mm | Two bushings at 15° angle |
| Side View | Box width 267mm; Base 212mm (262mm total) | Primary bushing, secondary terminals 4-M10 |
| Top View | 273±2 x 216±2mm | Two bushings A and B, air valve, oil filling hole |
Wiring Diagram
Installation Guidelines
- Install in outdoor switchgear or substation with adequate ventilation
- Connect primary terminals A and B to voltage system
- Connect secondary terminals 1a-1b and 2a-2b to meters and protection devices
- Ensure proper grounding of secondary circuit (terminal 2b)
- For three-phase measurement, connect two transformers in V-configuration
- Verify voltage ratio matches system requirements before commissioning
- Check oil level and insulation resistance before energizing
Oil-Immersed Features
The JDJ-11W incorporates advanced oil-immersed insulation technology including:
- Excellent dielectric strength for high-voltage applications
- Superior thermal dissipation for continuous operation
- Wide temperature range operation (-40°C to +40°C)
- Proven reliability in outdoor environments
Standards
The JDJ-11W oil-filled voltage transformer complies with GB20840.3-2013 and IEC61869-3:2011 for voltage transformers, ensuring compatibility with Chinese and international standards for medium-voltage measurement applications.
Selection Guide
Select by system voltage: JDJ-11W is designed for 11kV systems with 12/42/75kV insulation level.
Select by voltage ratio: Choose 10/0.1, 11/0.11, 10/0.22, or 11/0.22 based on system requirements.
Select by accuracy class: Use 0.2 for high-precision metering or 0.5 for standard metering.
Select by rated output: Choose rated output (30-500VA) based on connected burden requirements.
Ordering Information
When ordering the JDJ-11W oil-filled voltage transformer, please specify:
- Model: JDJ-11W
- System voltage: 11kV
- Voltage ratio: 10/0.1, 11/0.11, 10/0.22, or 11/0.22
- Accuracy class: 0.2 or 0.5
- Rated output: Specify VA value from table
- Frequency: 50Hz or 60Hz
- Installation type: Outdoor
- Quantity
FAQs