Product Overview
The JDZ(X)2-12(35)W voltage transformer is an outdoor epoxy resin cast single-phase measurement device designed for 10kV and below medium-voltage distribution systems. This fully enclosed voltage transformer features advanced epoxy resin insulation technology, providing excellent dielectric strength and reliable operation in harsh outdoor environments.
The JDZ(X)2-12(35)W delivers precise voltage measurement for energy metering, voltage monitoring, and relay protection applications in neutral non-effectively grounded systems. The epoxy resin cast construction ensures superior insulation performance with arc resistance, UV resistance, aging resistance, long creepage distance, low partial discharge, and over-voltage resistance. Compact design with small volume and light weight allows installation in any direction.
Product Display
Application Position
The JDZ(X)2-12(35)W is installed in outdoor switchgear, substations, and distribution networks where reliable single-phase voltage measurement is required. The epoxy resin insulation provides excellent moisture resistance and UV protection for long-term outdoor operation. Flexible connection configurations (Y or V connection) accommodate various protection and metering system requirements.
Main Applications
- 10kV and below outdoor distribution networks
- Substations requiring voltage measurement
- Industrial facilities with medium-voltage supply
- Energy metering applications
- Voltage monitoring and relay protection
- Neutral non-effectively grounded systems
Application Case Studies
Application Scenario 1: Substation Voltage Measurement
Utilities deploy the JDZ(X)2-12(35)W epoxy resin voltage transformer in 10kV substations for energy metering and relay protection. The Y connection configuration provides accurate voltage signals for protection relays, while the epoxy resin insulation ensures reliable performance in outdoor environments with anti-pollution class IV rating.
Application Scenario 2: Industrial Medium-Voltage Metering
Industrial facilities with 10kV incoming supply require accurate voltage measurement for energy management and protection coordination. The JDZ(X)2-12(35)W offers flexible connection options (Y or V connection) to meet different system requirements, with compact design allowing installation in any direction and light weight simplifying installation.
Application Fit
Suitable For
- Outdoor 10kV and below voltage measurement
- Substations with energy metering requirements
- Industrial facilities with medium-voltage supply
- Voltage monitoring applications
- Relay protection systems
- Neutral non-effectively grounded systems
Not Recommended For
- Indoor-only compact switchgear applications
- Current measurement applications (use CT instead)
- High-voltage systems above 35kV (use higher voltage class models)
- Applications requiring three-phase measurement in single unit
Installation Conditions
- Installation position: Outdoor switchgear, substations, or distribution points
- Ambient temperature: -25°C to +40°C
- Anti-pollution class: IV class
- Insulation: Epoxy resin cast
- Frequency: 50Hz or 60Hz
- Connection: Y connection or V connection
- Maintenance: Minimal maintenance required (epoxy resin design)
Technical Parameters
The JDZ(X)2-12(35)W is an outdoor epoxy resin cast single-phase voltage transformer for 10kV and below systems. Operating temperature -25°C to +40°C, anti-pollution class IV, compliant with IEC186 and GB1207-1997 standards.
Model Designation
| Code | Meaning |
|---|---|
| J | Voltage transformer |
| D | Single phase |
| Z | Casting resin insulated |
| (X) | With residual voltage winding |
| 2 | Design sequence |
| 12(35) | Highest voltage of equipment (kV) |
| W | Outdoor installation |
VT Data
| Model | Rated Voltage (kV) |
Accuracy Class |
Connection Type |
|---|---|---|---|
| JDZ2-12W | 12 | 0.2 / 0.5 | Y connection |
| JDZX2-12W | 12 | 0.2 / 0.5 | Y connection (with residual voltage winding) |
| JDZ2-35W | 35 | 0.2 / 0.5 | V connection |
| JDZX2-35W | 35 | 0.2 / 0.5 | V connection (with residual voltage winding) |
Installation
Dimension Reference
| Feature | Specification | Application Note |
|---|---|---|
| Installation | Any direction | Compact design allows flexible mounting |
| Base | Square metal plate with 4 mounting holes | Secure bolting to foundation |
| Bushings | Two vertical insulators | Primary and secondary connections |
Wiring Diagram
Installation Guidelines
- Install in outdoor switchgear or substation with adequate ventilation
- Connect primary terminal to voltage system
- Connect secondary terminals to meters and protection devices
- For Y connection, connect neutral point to system ground
- For V connection, connect between two phases
- Verify voltage ratio matches system requirements before commissioning
- Check insulation resistance before energizing
Epoxy Resin Features
The JDZ(X)2-12(35)W incorporates advanced epoxy resin technology including:
- Electric arc resistance for enhanced safety
- UV resistance for long-term outdoor operation
- Aging resistance for extended service life
- Long creepage distance for anti-pollution performance
- Low partial discharge for reliable insulation
- Over-voltage resistance for system protection
Standards
The JDZ(X)2-12(35)W epoxy resin voltage transformer complies with IEC186 and GB1207-1997 for voltage transformers, ensuring compatibility with international and Chinese standards for medium-voltage measurement applications. Partial discharge test conditions according to GB1207-1997 are fulfilled without exception.
Selection Guide
Select by system voltage: Choose JDZ2-12W for 12kV systems or JDZ2-35W for 35kV systems.
Select by accuracy class: Use 0.2 for high-precision metering or 0.5 for standard metering.
Select by connection type: Choose Y connection for star-connected systems or V connection for phase-to-phase measurement.
Select by residual voltage winding: Choose JDZX2 model if residual voltage winding is required for ground fault detection.
Ordering Information
When ordering the JDZ(X)2-12(35)W epoxy resin voltage transformer, please specify:
- Model: JDZ2-12W, JDZX2-12W, JDZ2-35W, or JDZX2-35W
- System voltage: 12kV or 35kV
- Accuracy class: 0.2 or 0.5
- Connection type: Y connection or V connection
- Residual voltage winding: Yes (JDZX2) or No (JDZ2)
- Frequency: 50Hz or 60Hz
- Installation type: Outdoor
- Quantity