Overview
The JSJWF-6W JSJWF-10W is an outdoor oil-filled three-phase voltage transformer designed for 10kV medium-voltage distribution systems. It uses oil-immersed insulation to ensure high dielectric strength and stable performance in demanding outdoor conditions.
This transformer supports multiple accuracy classes (0.2, 0.5, 1.0) and offers flexible winding configurations (Y/△ three-winding or Y/Y/△ four-winding) for protection, metering, and power quality monitoring applications. With a maximum output capacity of 600VA and an operating temperature range of -40°C to +40°C, it meets IEC and GB standards for outdoor voltage measurement in substations and industrial facilities.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 10kV |
| Insulation Type | Oil-filled |
| Phases | Three-phase |
| Accuracy Classes | 0.2, 0.5, 1.0 |
| Winding Configurations | Y/△ (3-winding), Y/Y/△ (4-winding) |
| Max Output Capacity | 600VA |
| Operating Temperature | -40°C to +40°C |
| Application Environment | Outdoor |
| Primary Voltage | 10/√3 kV |
| Secondary Voltage | 100/√3 V, 100 V |
| Frequency | 50 Hz |
| Dielectric Strength | High (oil-immersed) |
Construction
The JSJWF-10W features a robust oil-filled tank construction with fully sealed design to prevent moisture ingress and oil leakage. The core and windings are immersed in high-grade insulating oil, providing excellent dielectric strength and efficient heat dissipation. Primary windings are made of enameled copper wire, while secondary windings are encapsulated in cast-resin for mechanical stability and moisture resistance. The enclosure is constructed from galvanized steel with anti-corrosion treatment, suitable for long-term outdoor exposure. All bushings and terminals are designed for secure, weather-resistant connections in compliance with outdoor installation requirements.
Technical Parameters
Service 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: Y/△ (three-winding) or Y/Y/△ (four-winding)
- Maintenance: Periodic oil level and quality inspection recommended
Technical Parameters
The JSJWF-10W is an outdoor oil-filled three-phase voltage transformer designed for 10kV systems. It features oil-immersed insulation, operates within an ambient temperature range of -40°C to +40°C, and is suitable for installations up to 1000m altitude (higher altitudes available on request). The product complies with GB20840.3-2013 and IEC61869-3:2011 standards.
| Type | Rated Voltage | Accuracy class /
Rated output (VA) |
Max.
output |
Rated
insulation (kV) |
|---|---|---|---|---|
| JSJWF-10W | 10/√3 : 0.1/√3 : 0.1/3 | 0.2/3P-3*30/100 0.2/6P-3*30/100 0.5/3P-3*80/100 0.5/6P-3*80/100 1.0/3P-3*150/100 1.0/6P-3*150/100 |
600 VA | 12 / 42 / 75 |
| 10/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 0.2/0.5/3P-3*30/3*40/50 0.2/0.5/6P-3*30/3*40/50 |
500 VA |
Installation & Wiring
Installation Diagram
The JSJWF-10W is designed for outdoor mounting on switchgear or substation structures. Ensure adequate clearance around the unit for ventilation and maintenance access. Mounting holes align with standard support frames as shown in the top view dimensions (520 x 605 x 335mm). Use appropriate lifting equipment via the integrated hook during installation due to its 142kg weight.
Wiring Diagram
Primary terminals A, B, and C connect directly to the three-phase power system. Secondary terminals supply metering and protection circuits, with the neutral point of the secondary winding requiring solid grounding. For ground fault detection applications using a Y/△ configuration, the tertiary winding must be connected in open delta per the wiring diagram. Always confirm the voltage ratio matches system specifications before energizing.
Selection & FAQs
Selection Guide
- Select for 10kV systems with 12/42/75kV insulation level.
- Choose accuracy class 0.2 for high-precision metering, 0.5 for standard metering, or 1.0 for general measurement.
- Pick Y/△ (three-winding) for basic applications or Y/Y/△ (four-winding) for enhanced system flexibility.
- Specify rated output based on connected burden requirements, up to a maximum of 600VA.
- Confirm operating frequency: 50Hz or 60Hz.
- Ensure installation environment is outdoor-rated.
Frequently Asked Questions
Q1: Can this 10kV voltage transformer be installed at altitudes above 1000m?
Yes, subject to project confirmation. The standard model supports up to 1000m, but higher altitude versions are available upon request. Please specify your exact installation altitude during inquiry.
Q2: Which accuracy class should I select for metering and protection?
Select 0.2 or 0.5 class for metering, and 3P/6P for protection. The transformer offers multiple accuracy options with a maximum output of 600 VA. Contact us with your specific burden requirements for factory configuration.
Q3: What are the ambient temperature limits for outdoor installation?
The JSJWF-10W operates reliably in ambient temperatures ranging from -40°C to +40°C. It features oil-immersed insulation designed specifically for harsh outdoor switchgear environments. Regular oil level and quality inspections are recommended for optimal maintenance.
Q4: Which international standards does this three-phase voltage transformer comply with?
The product strictly complies with IEC 61869-3:2011 and GB20840.3-2013 standards. These specifications ensure reliable performance for 10kV outdoor systems globally. Please request detailed compliance certificates from our sales team.
Q5: How many secondary windings are available for this 10kV model?
The transformer is available in both three-winding (Y/△) and four-winding (Y/Y/△) configurations. This flexibility supports various secondary voltage requirements like 0.1/√3 kV and 0.1/3 kV. Specify your preferred connection type when ordering.
Q6: What is the primary application for the JSJWF-10W oil-filled transformer?
It is primarily used for voltage measurement and protection in 10kV outdoor substations and distribution points. The oil-immersed design provides robust insulation for outdoor switchgear applications. Contact our engineering team for project-specific application support.
Q7: Which routine factory tests are conducted before shipment?
Standard routine tests are performed to ensure compliance with IEC 61869-3. Specific test items and factory acceptance procedures are subject to confirmation. Please contact our sales team for the detailed test protocol.