Overview
The JDJJ9-10W is a single-phase outdoor Oil-Immersed voltage transformer designed for 10kV medium-voltage distribution systems. It uses oil-immersed insulation to provide high dielectric strength and stable performance in demanding outdoor environments.
This transformer supports multiple accuracy classes (0.2, 0.5, and 1.0) for metering and protection applications, with output capacities up to 800VA. It complies with IEC 61869 standards and is suitable for use in substations, industrial facilities, and outdoor switchgear where reliable voltage measurement under varying environmental conditions is required.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 10kV |
| Primary Voltage | 10 / √3 kV |
| Secondary Voltage (Metering) | 100 / √3 V |
| Secondary Voltage (Protection) | 100 V (open delta) |
| Accuracy Classes | 0.2 / 0.5 / 1.0 |
| Maximum Output | 800VA |
| Insulation Type | Oil-filled |
| Phase Configuration | Single-phase |
| Winding Configurations | Y/△ (three-winding), Y/Y/△ (four-winding) |
| Installation Location | Outdoor |
| Frequency | 50/60 Hz |
| Standards Compliance | IEC 61869 |
Construction
The JDJJ9-10W features a robust oil-filled construction with high-quality insulating oil that provides both electrical insulation and thermal dissipation. The core and windings are fully immersed in oil within a sealed tank, ensuring long-term reliability and resistance to moisture ingress. The enclosure is made of corrosion-resistant materials suitable for prolonged outdoor exposure, with porcelain or composite bushings for primary and secondary connections. This design delivers excellent dielectric performance and mechanical stability across wide temperature ranges, making it ideal for continuous operation in harsh environments.
Technical Parameters
Service Conditions
- Installation position: Outdoor switchgear, substations, or distribution points
- Ambient temperature: -25°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 JDJJ9-10W is an outdoor oil-filled voltage transformer designed for 10kV systems. It features oil-immersed insulation, operates within an ambient temperature range of -25°C to +40°C, and is suitable for installations up to 1000m altitude (higher altitudes available on request). The product complies with GB20840.1-2010 and GB20840.3-2013 standards.
| YTPE | Rated Voltage | Rated
insulation |
Accuracy class /
Rated output (VA) |
Max.
output |
|---|---|---|---|---|
| JDJJ9-6W | 6/√3 : 0.1/√3 : 0.1/3 | 7.2/32/60 | 0.2/3P—50/100 0.2/6P—50/100 0.5/3P—150/100 0.5/6P—150/100 1.0/6P—300/100 |
800 VA |
| 6/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 0.2/0.5/3P—20/40/100 0.2/0.5/6P—20/40/100 0.2/0.5/3P—30/30/100 0.2/0.5/6P—30/30/100 |
800 VA | ||
| JDJJ9-10W | 10/√3 : 0.1/√3 : 0.1/3 | 12/42/75 | 0.2/3P—50/100 0.2/6P—50/100 0.5/3P—150/100 0.5/6P—150/100 1.0/6P—300/100 |
800VA |
| 10/√3 : 0.1/√3 : 0.1/√3 : 0.1/3 | 0.2/0.5/3P—20/40/100 0.2/0.5/6P—20/40/100 0.2/0.5/3P—30/30/100 0.2/0.5/6P—30/30/100 |
800 VA |
Installation & Wiring
Wiring Diagram
The JDJJ9-10W voltage transformer features primary terminals labeled A, B, and C for connection to the three-phase system. The neutral terminal (N) must be connected to the system ground. Secondary terminals deliver scaled-down voltage outputs suitable for metering and protective relaying circuits. For Y/△ configurations, the tertiary winding is intended for open-delta connection to enable ground fault detection.
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.
- Opt for Y/△ (three-winding) connection 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 800VA.
- Confirm operating frequency: 50Hz or 60Hz.
- Ensure outdoor installation suitability is required for your application.
Frequently Asked Questions
Q1: Can this outdoor voltage transformer be installed above 1000m altitude?
The standard maximum altitude is 1000m. For higher elevations, customized designs are available subject to factory confirmation. Please specify your exact site altitude when inquiring.
Q2: Which winding configuration is suitable for protection circuits?
The four-winding Y/Y/△ connection is available for this model. This configuration provides the necessary secondary outputs for measurement and protection circuits. Confirm your specific relay requirements with our engineering team.
Q3: How does extreme cold affect the oil-immersed insulation performance?
The transformer operates reliably in ambient temperatures down to -25°C. The oil-immersed insulation maintains dielectric strength within this specified environmental range. Periodic oil quality inspections are recommended for optimal performance.
Q4: Are these voltage transformers compliant with specific industry standards?
Yes, the JDJJ9-10W complies with GB20840.1-2010 and GB20840.3-2013 standards. These govern the performance and testing of instrument transformers. Request the specific type test reports for your project documentation.
Q5: What routine factory tests are performed before shipment?
Factory testing procedures prior to shipment are subject to confirmation. Detailed test certificates and specific quality assurance reports can be provided upon request. Contact our sales team for the exact documentation.
Q6: Where is this single-phase voltage transformer typically applied?
It is primarily used in outdoor switchgear, substations, and distribution points for 10kV systems. The oil-immersed design ensures reliable voltage measurement. Specify your exact application during the initial inquiry.