Product Overview
The JSZY16-24R voltage transformer is an indoor three-phase epoxy resin cast measurement device designed for 20kV medium-voltage distribution systems. This advanced voltage transformer features epoxy resin cast insulation technology with rib plug type construction, providing excellent dielectric strength and maintenance-free operation for reliable performance in indoor environments.
The JSZY16-24R delivers precise three-phase voltage measurement for energy metering, voltage monitoring, and relay protection applications with multiple accuracy classes (0.2, 0.5, 3P) and flexible winding configurations (Y/△ three-winding or Y/Y/△ four-winding). The epoxy resin cast construction ensures superior insulation performance while providing up to 1000VA maximum output capacity. Compact design with 135kg weight simplifies installation and reduces structural support requirements.
Product Display
Application Position
The JSZY16-24R is installed in indoor switchgear, substations, and distribution networks where reliable three-phase voltage measurement is required. The epoxy resin insulation provides excellent moisture resistance and UV protection for long-term indoor operation. Multiple winding configurations (Y/△ or Y/Y/△) accommodate various protection and metering system requirements simultaneously.
Main Applications
- 20kV indoor distribution networks
- Substations requiring three-phase voltage measurement
- 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 Three-Phase Measurement
Utilities deploy the JSZY16-24R epoxy resin voltage transformer in 20kV indoor substations for energy metering and relay protection. The Y/△ three-winding configuration provides accurate voltage signals for protection relays and metering devices, while the epoxy resin insulation ensures reliable performance in indoor environments with 24/65/125kV insulation level and maintenance-free operation.
Application Scenario 2: Industrial Medium-Voltage Metering
Industrial facilities with 20kV incoming supply require accurate three-phase voltage measurement for energy management and protection coordination. The JSZY16-24R offers multiple accuracy classes (0.2, 0.5, 3P) to meet different measurement requirements, with Y/Y/△ four-winding configuration providing enhanced system flexibility and up to 1000VA maximum output capacity for various burden conditions.
Application Fit
Suitable For
- Indoor 20kV three-phase voltage measurement
- Substations with energy metering 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 24kV (use higher voltage class models)
- Applications requiring single-phase measurement only
Installation Conditions
- Installation position: Indoor switchgear, substations, or distribution points
- Ambient temperature: -25°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Epoxy resin cast
- Frequency: 50Hz or 60Hz
- Connection: Y/△ (three-winding) or Y/Y/△ (four-winding)
- Maintenance: Minimal maintenance required (epoxy resin design)
Technical Parameters
The JSZY16-24R is an indoor epoxy resin cast three-phase voltage transformer for 20kV systems. Operating temperature -25°C to +40°C, compliant with GB20840.1-2010 and GB20840.3-2013 standards.
VT Data – Three-Winding (Y/△)
| Rated Voltage (kV) |
Accuracy Class & Rated Output (VA) |
Max Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 20/√3 : 0.1/√3 : 0.1/3 | 0.2/3P: 3×30/100 0.5/3P: 3×100/100 |
800 | 24/65/125 |
VT Data – Four-Winding (Y/Y/△)
| Rated Voltage (kV) |
Accuracy Class & Rated Output (VA) |
Max Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 20/√3 : 0.1/√3 : 0.22/√3 : 0.1/3 | 0.2/3.0/3P: 3×25/3×500/100 | 1000 | 24/65/125 |
Installation
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Height 478mm; Width 390/394mm | Three terminals (A, B, C), nameplate, terminal block |
| Side View | Base 427mm (inner 330mm); Terminal center 269mm; Top 316mm; Ø28mm | Profile depth and terminal diameter |
| Top View | Width 360mm; Depth 280mm; Spacing 164+164mm | Rectangular footprint and mounting hole spacing |
Weight: Approximately 135kg
Wiring Diagram
Installation Guidelines
- Install in indoor 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
- For Y/△ connection, connect tertiary winding in open delta for ground fault detection
- Verify voltage ratio matches system requirements before commissioning
- Check insulation resistance before energizing
Three-Phase Features
The JSZY16-24R incorporates three-phase measurement technology including:
- Simultaneous measurement of all three phases
- Balanced voltage signals for protection relays
- Reduced installation space compared to three single-phase units
- Enhanced system reliability and redundancy
Epoxy Resin Features
The JSZY16-24R incorporates advanced epoxy resin technology including:
- Excellent moisture resistance for indoor operation
- UV protection for long-term performance
- Superior insulation performance with 24/65/125kV level
- Maintenance-free construction eliminating periodic inspection
Standards
The JSZY16-24R epoxy resin 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: JSZY16-24R is designed for 20kV systems with 24/65/125kV insulation level.
Select by winding configuration: Choose Y/△ (three-winding) for basic applications or Y/Y/△ (four-winding) for enhanced system flexibility.
Select by accuracy class: Use 0.2 for high-precision metering, 0.5 for standard metering, or 3P for protection applications.
Select by rated output: Choose rated output based on connected burden requirements (up to 1000VA maximum).
Ordering Information
When ordering the JSZY16-24R epoxy resin voltage transformer, please specify:
- Model: JSZY16-24R
- System voltage: 20kV
- Winding configuration: Y/△ (three-winding) or Y/Y/△ (four-winding)
- Accuracy class: 0.2, 0.5, or 3P
- Rated output: Specify VA value from table
- Frequency: 50Hz or 60Hz
- Installation type: Indoor
- Quantity
FAQs