Product Overview
The JSZJFKW-3/6/10 voltage transformer is an outdoor dry-type three-phase anti-ferroresonance measurement device designed for 3kV, 6kV, and 10kV medium-voltage distribution systems. This advanced voltage transformer features specialized anti-ferroresonance technology combined with dry-type insulation in a robust metal enclosure, providing excellent protection against dangerous ferroresonance phenomena while ensuring reliable operation in harsh outdoor environments.
The JSZJFKW-3/6/10 delivers precise three-phase voltage measurement for protection and metering applications with multiple accuracy classes (0.2, 0.5, 1, 3) and Y/Y/△ four-winding configuration. The metal enclosure with ventilation slots provides superior heat dissipation and mechanical protection. The anti-ferroresonance design prevents dangerous overvoltages and harmonic distortions in power networks, ensuring stable operation in cable networks and long transmission lines.
Product Display
Application Position
The JSZJFKW-3/6/10 is installed in outdoor switchgear, substations, and distribution networks where reliable three-phase voltage measurement and ferroresonance protection are required. The metal enclosure with ventilation slots provides excellent heat dissipation for continuous operation. The Y/Y/△ four-winding configuration accommodates various protection and metering system requirements with enhanced system flexibility.
Main Applications
- 3kV, 6kV, and 10kV outdoor distribution networks
- Substations requiring ferroresonance protection
- Industrial facilities with medium-voltage supply
- Protection relay voltage input
- Power quality monitoring and metering
- Cable networks and long transmission lines
Application Case Studies
Application Scenario 1: Substation Ferroresonance Protection
Utilities deploy the JSZJFKW-3/6/10 dry-type voltage transformer in 6kV and 10kV substations where ferroresonance conditions may occur during switching operations or ground faults. The specialized anti-ferroresonance core design prevents dangerous overvoltages that could damage equipment and compromise system reliability, while the Y/Y/△ four-winding configuration provides comprehensive voltage measurement for protection and metering applications.
Application Scenario 2: Industrial Medium-Voltage Networks
Industrial facilities with 3kV, 6kV, or 10kV incoming supply require both accurate voltage measurement and protection against ferroresonance phenomena. The JSZJFKW-3/6/10 offers multiple accuracy classes (0.2, 0.5, 1, 3) to meet different measurement requirements, with the metal enclosure providing superior mechanical protection in demanding industrial environments and enhanced heat dissipation for continuous operation.
Application Fit
Suitable For
- Outdoor 3kV, 6kV, and 10kV voltage measurement
- Substations with ferroresonance protection requirements
- Industrial facilities with medium-voltage supply
- Power quality monitoring applications
- Cable networks and long transmission lines
- Environments requiring enhanced mechanical protection
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 without ferroresonance concerns (standard PT may be more economical)
Installation Conditions
- Installation position: Outdoor switchgear, substations, or distribution points
- Ambient temperature: -5°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Dry-type with metal enclosure
- Frequency: 50Hz or 60Hz
- Connection: Y/Y/△ (four-winding)
- Maintenance: Minimal maintenance required
Technical Parameters
The JSZJFKW-3/6/10 is an outdoor dry-type three-phase anti-ferroresonance voltage transformer for 3kV, 6kV, and 10kV systems. Operating temperature -5°C to +40°C, compliant with GB20840.3-2013 and IEC61869-3:2011. Features anti-ferroresonance design, dry-type insulation, and Y/Y/△ four-winding configuration.
VT Data
| Rated Voltage Ratio (V) |
Accuracy Class & Rated Output (VA) |
Limit Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 3000/√3 : 100/√3 : 100 | 0.2: 60 0.5: 120 1: 240 3: 600 |
1200 | 3.6/23/40 |
| 6000/√3 : 100/√3 : 100 | 0.2: 60 0.5: 120 1: 240 3: 600 |
1200 | 7.2/32/60 |
| 10000/√3 : 100/√3 : 100 | 0.2: 60 0.5: 120 1: 240 3: 600 |
1200 | 12/42/75 |
Installation
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Height 820±5mm; Width 790mm | Four bushings (A, B, C, N), spacing 226±3, 180±3, 180±3mm |
| Side View | Width 524mm | Profile with ventilation slots |
| Top View | 860 x 495mm | Terminal layout (N, C, B, A) |
Weight: Approximately 144kg
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
- Connect secondary terminals to meters and protection devices
- Ensure proper grounding of secondary circuit
- Verify voltage ratio matches system requirements before commissioning
- Check insulation resistance before energizing
Anti-Ferroresonance Features
The JSZJFKW-3/6/10 incorporates advanced anti-ferroresonance technology including:
- Specialized core design prevents ferroresonance phenomena
- Prevents dangerous overvoltages during switching operations
- Eliminates harmonic distortions in power networks
- Ensures stable operation in cable networks and long transmission lines
Dry-Type Metal Enclosure Features
The JSZJFKW-3/6/10 features dry-type insulation with metal enclosure including:
- Metal enclosure provides superior mechanical protection
- Ventilation slots ensure excellent heat dissipation
- Dry-type design eliminates oil maintenance requirements
- Robust construction for harsh outdoor environments
Standards
The JSZJFKW-3/6/10 dry-type 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: Choose JSZJFKW-3 for 3kV, JSZJFKW-6 for 6kV, or JSZJFKW-10 for 10kV systems with appropriate insulation level.
Select by accuracy class: Use 0.2 for high-precision metering, 0.5 for standard metering, 1 for general measurement, or 3 for indication purposes.
Select by rated output: Choose rated output (60-600VA) based on connected burden requirements.
Ordering Information
When ordering the JSZJFKW-3/6/10 dry-type voltage transformer, please specify:
- Model: JSZJFKW-3, JSZJFKW-6, or JSZJFKW-10
- System voltage: 3kV, 6kV, or 10kV
- Accuracy class: 0.2, 0.5, 1, or 3
- Rated output: Specify VA value from table
- Frequency: 50Hz or 60Hz
- Installation type: Outdoor
- Quantity
FAQs