Product Overview
The JDZX(F)9-35Q voltage transformer is an indoor epoxy resin cast single-phase measurement device designed for 35kV medium-voltage distribution systems. This advanced voltage transformer features epoxy resin cast insulation technology, providing excellent dielectric strength and maintenance-free operation for reliable performance in indoor environments.
The JDZX(F)9-35Q series delivers precise voltage measurement for energy metering, voltage monitoring, and relay protection applications with multiple accuracy classes (0.2, 0.5, 1.0, 3P/6P) and flexible winding configurations. Available in two models: JDZX9-35Q with three-winding configuration (Y/△ connection) and JDZXF9-35Q with four-winding configuration (Y/Y/△ connection). The epoxy resin cast construction ensures superior insulation performance while providing up to 600VA thermal limit output capacity. Compact design with 58kg weight simplifies installation and reduces structural support requirements.
Product Display
Application Position
The JDZX(F)9-35Q is installed in indoor 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 indoor operation. Three units are typically connected in three-phase configuration with star-connected primary and secondary windings, plus open-delta connected residual voltage winding for ground fault detection.
Main Applications
- 35kV indoor distribution networks
- Substations requiring voltage measurement with ground fault detection
- Industrial facilities with medium-voltage supply
- Energy metering applications
- Voltage monitoring and relay protection
- Indoor power distribution systems
Application Case Studies
Application Scenario 1: Substation Voltage Measurement with Ground Fault Detection
Utilities deploy three JDZX9-35Q epoxy resin voltage transformers in 35kV indoor substations for energy metering and ground fault protection. The three-winding configuration with Y/△ connection provides accurate voltage signals for protection relays and metering devices, while the open-delta connected residual voltage winding enables reliable ground fault detection. The epoxy resin insulation ensures reliable performance in indoor environments with 40.5/95/200kV insulation level and maintenance-free operation.
Application Scenario 2: Industrial Medium-Voltage Metering with Enhanced Flexibility
Industrial facilities with 35kV incoming supply require accurate voltage measurement for energy management and protection coordination. The JDZXF9-35Q offers four-winding configuration (Y/Y/△) with dual secondary outputs, providing enhanced system flexibility and redundancy for critical applications. Multiple accuracy classes (0.2, 0.5, 3P/6P) meet different measurement requirements, with 2×300VA thermal limit output capacity for various burden conditions.
Application Fit
Suitable For
- Indoor 35kV voltage measurement
- Substations with ground fault detection requirements
- Industrial facilities with medium-voltage supply
- Voltage monitoring applications
- Relay protection systems
- Environments requiring maintenance-free operation
Not Recommended For
- Outdoor installation applications (use outdoor-rated models)
- Current measurement applications (use CT instead)
- High-voltage systems above 40.5kV (use higher voltage class models)
- Applications requiring three-phase measurement in single unit
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: Epoxy resin cast
- Frequency: 50Hz or 60Hz
- Connection: Single-phase (three units for three-phase system)
- Maintenance: Minimal maintenance required (epoxy resin design)
Technical Parameters
The JDZX(F)9-35Q series includes indoor epoxy resin cast single-phase voltage transformers for 35kV systems. Operating temperature -5°C to +40°C, compliant with GB20840.1.3 and IEC61869-1.3 standards.
VT Data – JDZX9-35Q (Three-Winding, Y/△)
| Rated Voltage (kV) |
Accuracy Class & Rated Output (VA) |
Thermal Limit Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 35/√3 : 0.1/√3 : 0.1/3 | 0.2/3P(6P): 30/100 0.5/3P(6P): 60/100 1.0/3P(6P): 150/100 |
600 | 40.5/95/200 |
VT Data – JDZXF9-35Q (Four-Winding, Y/Y/△)
| Rated Voltage (kV) |
Accuracy Class & Rated Output (VA) |
Thermal Limit Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 35/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 0.2/0.5/3P(6P): 15/20/100 | 2×300 | 40.5/95/200 |
Installation
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Height 354.5mm; Top width 290mm; Base width 375mm | Grounding terminal M8 |
| Side View | Total height 500mm; Base width 260mm; Radius R130 | Nameplate, lifting hook |
| Top View | Base plate 315mm x 200mm | Terminal layout |
Weight: Approximately 58kg
Wiring Diagram
Installation Guidelines
- Install three units in indoor switchgear or substation for three-phase measurement
- Connect primary windings in star configuration with neutral grounded
- Connect secondary windings in star configuration for measurement and protection
- Connect residual voltage windings in open-delta configuration for ground fault detection
- Ensure proper grounding of all secondary circuits
- Verify voltage ratio matches system requirements before commissioning
- Check insulation resistance before energizing
Epoxy Resin Features
The JDZX(F)9-35Q incorporates advanced epoxy resin technology including:
- Excellent moisture resistance for indoor operation
- UV protection for long-term performance
- Superior insulation performance with 40.5/95/200kV level
- Maintenance-free construction eliminating periodic inspection
Standards
The JDZX(F)9-35Q epoxy resin voltage transformer complies with GB20840.1.3 and IEC61869-1.3 for voltage transformers, ensuring compatibility with Chinese and international standards for medium-voltage measurement applications.
Selection Guide
Select by system voltage: JDZX(F)9-35Q is designed for 35kV systems with 40.5/95/200kV insulation level.
Select by model: Choose JDZX9-35Q for three-winding applications or JDZXF9-35Q for four-winding applications with enhanced flexibility.
Select by accuracy class: Use 0.2 for high-precision metering, 0.5 for standard metering, 1.0 for general measurement, or 3P/6P for protection applications.
Select by rated output: Choose rated output (15-150VA) based on connected burden requirements.
Ordering Information
When ordering the JDZX(F)9-35Q epoxy resin voltage transformer, please specify:
- Model: JDZX9-35Q or JDZXF9-35Q
- System voltage: 35kV
- Winding configuration: Three-winding (Y/△) or four-winding (Y/Y/△)
- Accuracy class: 0.2, 0.5, 1.0, or 3P(6P)
- Rated output: Specify VA value from table
- Frequency: 50Hz or 60Hz
- Installation type: Indoor
- Quantity (typically 3 units for three-phase system)
FAQs