Product Overview
The VOL-24 voltage transformer is an outdoor oil-filled single-phase measurement device designed for 20kV and 22kV medium-voltage distribution systems. This advanced voltage transformer features oil-immersed insulation technology, providing excellent dielectric strength and thermal dissipation for reliable operation in harsh outdoor environments.
The VOL-24 delivers precise voltage measurement for energy metering, voltage monitoring, and relay protection applications with multiple accuracy classes (0.2, 0.5, 1.0) and flexible voltage ratios (20/0.1kV and 22/0.11kV). The oil-immersed construction ensures superior thermal performance while providing 500VA maximum output capacity. Ultra-wide temperature range operation (-40°C to +40°C) makes it suitable for extreme climate conditions.
Product Display
Application Position
The VOL-24 is installed in outdoor switchgear, substations, and distribution networks where reliable single-phase voltage measurement is required. The oil-immersed insulation provides excellent dielectric strength and thermal dissipation for continuous outdoor operation. Flexible voltage ratios accommodate both 20kV and 22kV system configurations.
Main Applications
- 20kV and 22kV outdoor distribution networks
- Substations requiring voltage measurement
- Industrial facilities with medium-voltage supply
- Energy metering applications
- Voltage monitoring and relay protection
- Extreme climate environments (-40°C to +40°C)
Application Case Studies
Application Scenario 1: Substation Voltage Measurement
Utilities deploy the VOL-24 oil-filled voltage transformer in 22kV substations for energy metering and relay protection. The 22/0.11kV voltage ratio provides accurate voltage signals for protection relays, while the oil-immersed design delivers reliable performance in outdoor environments with 24/50/125kV insulation level and ultra-wide temperature range operation.
Application Scenario 2: Industrial Medium-Voltage Metering
Industrial facilities with 20kV incoming supply require accurate voltage measurement for energy management and protection coordination. The VOL-24 offers multiple accuracy classes (0.2, 0.5, 1.0) to meet different measurement requirements, with 500VA maximum output capacity for various burden conditions and flexible 20/0.1kV voltage ratio for 20kV systems.
Application Fit
Suitable For
- Outdoor 20kV and 22kV voltage measurement
- Substations with energy metering requirements
- Industrial facilities with medium-voltage supply
- Voltage monitoring applications
- Relay protection systems
- Extreme climate environments
Not Recommended For
- Indoor-only compact switchgear applications
- Current measurement applications (use CT instead)
- High-voltage systems above 24kV (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: -40°C to +40°C
- Altitude: ≤ 1000m (standard), higher altitude available on request
- Insulation: Oil-immersed
- Frequency: 50Hz or 60Hz
- Connection: Single-phase
- Maintenance: Periodic oil level and quality inspection recommended
Technical Parameters
The VOL-24 is an outdoor oil-filled single-phase voltage transformer for 20kV and 22kV systems. Operating temperature -40°C to +40°C, compliant with GB20840.3-2013 and IEC61869-3:2011 standards.
VT Data
| Rated Voltage (kV) |
Accuracy Class & Rated Output (VA) |
Max Output (VA) |
Insulation Level (kV) |
|---|---|---|---|
| 20/0.1 22/0.11 |
0.2: 30 0.5: 50 1.0: 100 |
500 | 24/50/125 |
Installation
Dimension Reference
| View | Key Dimensions |
Application Note |
|---|---|---|
| Front View | Height 626±5mm; Width 400±5mm; Base 320/340mm | Two insulators at 21° angle, primary connection 2-M10 |
| Side View | Distance 80mm; Base 200/240mm | Oil drain hole, grounding M10 |
| Top View | Length 504±5mm; Width 300mm; Inner 400mm | Insulator centers A and B |
| Mounting Base | 340/320 x 240/200mm | Mounting base plate dimensions |
Weight: Approximately 68kg
Wiring Diagram
[Wiring diagram to be added]
Installation Guidelines
- Install in outdoor switchgear or substation with adequate ventilation
- Connect primary terminals A and B to voltage system
- Connect secondary terminals to meters and protection devices
- Ensure proper grounding of secondary circuit
- Verify voltage ratio matches system requirements before commissioning
- Check oil level and insulation resistance before energizing
Oil-Immersed Features
The VOL-24 incorporates advanced oil-immersed insulation technology including:
- Excellent dielectric strength for high-voltage applications
- Superior thermal dissipation for continuous operation
- Ultra-wide temperature range operation (-40°C to +40°C)
- Proven reliability in outdoor environments
Standards
The VOL-24 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: Choose 20/0.1kV ratio for 20kV systems or 22/0.11kV ratio for 22kV systems.
Select by accuracy class: Use 0.2 for high-precision metering, 0.5 for standard metering, or 1.0 for general measurement.
Select by rated output: Choose rated output (30-100VA) based on connected burden requirements.
Ordering Information
When ordering the VOL-24 oil-filled voltage transformer, please specify:
- Model: VOL-24
- System voltage: 20kV or 22kV
- Voltage ratio: 20/0.1kV or 22/0.11kV
- Accuracy class: 0.2, 0.5, or 1.0
- Rated output: 30, 50, or 100 VA
- Frequency: 50Hz or 60Hz
- Installation type: Outdoor
- Quantity
FAQs