Overview
The JDJ-11W is a single-phase outdoor oil-filled voltage transformer designed for 11kV medium-voltage distribution systems. It uses oil-immersed insulation technology to provide high dielectric strength and reliable performance in harsh outdoor environments.
This transformer offers accuracy classes of 0.2 for metering and 0.5 for protection applications, with multiple voltage ratios including 10/0.1, 11/0.11, 10/0.22, and 11/0.22 kV. It supports a maximum output capacity of 800VA and operates reliably across a wide temperature range from -40°C to +40°C, making it suitable for demanding outdoor installations in substations and industrial facilities.
Key Ratings Snapshot
| Parameter | Rating |
|---|---|
| System Voltage | 11 kV |
| Primary Voltage Ratios | 10 kV, 11 kV |
| Secondary Voltage Ratios | 0.1 kV, 0.11 kV, 0.22 kV |
| Accuracy Class (Metering) | 0.2 |
| Accuracy Class (Protection) | 0.5 |
| Maximum Output Capacity | 800 VA |
| Insulation Type | Oil-filled |
| Phase Configuration | Single-phase |
| Operating Temperature Range | -40°C to +40°C |
| Application Environment | Outdoor |
Construction
The JDJ-11W features a robust oil-immersed construction with high-quality insulating oil that provides excellent dielectric strength and thermal dissipation. The core and windings are fully encapsulated in oil within a sealed tank, ensuring long-term reliability and protection against environmental factors such as moisture and dust. The single-phase design includes dual secondary windings to support both metering and protection functions simultaneously. All external surfaces are treated for corrosion resistance, and the unit is built to withstand extreme ambient temperatures from -40°C to +40°C without degradation in performance.
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: Single-phase or three-phase (V-connection)
- Maintenance: Periodic oil level and quality inspection recommended
Technical Parameters
The JDJ-11W is an outdoor oil-filled voltage transformer designed for 11kV systems, featuring oil-immersed insulation and compliance with GB20840.3-2013 and IEC61869-3:2011 standards. It operates within a temperature range of -40°C to +40°C and is rated for standard altitudes up to 1000m.
Voltage Transformer Data
| Rated Voltage (kV) |
Accuracy Class & Rated Output (VA) |
Max Output (VA) |
Rated Insulation (kV) |
|---|---|---|---|
| 10/0.1, 11/0.11 | 0.2: 30 VA 0.5: 50 VA |
800 | 12/42/75 |
| 10/0.22, 11/0.22 | 0.2/3P: 20/500 VA 0.5/3P: 50/500 VA |
800 | 12/42/75 |
Installation & Wiring
Installation Diagram
The JDJ-11W is designed for outdoor installation on switchgear or substation structures. Mount the unit vertically using the base dimensions (212mm, 262mm total width) and ensure adequate clearance for ventilation and maintenance access.
Wiring Diagram
Connect primary terminals A and B to the system voltage lines. Secondary terminals are labeled 1a-1b and 2a-2b; connect these to metering and protection devices as required. Terminal 2b must be grounded to ensure safety and measurement accuracy. For three-phase applications, two units should be connected in a V-configuration.
Selection & FAQs
Selection Guide
- Select for 11kV systems with 12/42/75kV insulation level.
- Choose voltage ratio from 10/0.1, 11/0.11, 10/0.22, or 11/0.22 based on system requirements.
- Pick accuracy class 0.2 for high-precision metering or 0.5 for standard metering applications.
- Specify rated output between 30VA and 500VA according to connected burden needs.
- Confirm operating frequency: 50Hz or 60Hz.
- Ensure installation type is outdoor, as the JDJ-11W is designed for outdoor use only.
Frequently Asked Questions
Q1: Which accuracy class is suitable for revenue metering on this 11kV voltage transformer?
Select the 0.2 accuracy class for metering applications, providing 30 VA rated output. This ensures precise measurements for billing purposes. Specify your exact voltage ratio and accuracy requirements during ordering for factory calibration.
Q2: Can this oil-filled voltage transformer operate in extreme cold environments?
Yes, it is designed for outdoor installation with an ambient temperature range of -40°C to +40°C. The oil-immersed insulation ensures reliable performance in harsh weather conditions. Contact us for extreme climate customization.
Q3: How can multiple single-phase units be connected for three-phase systems?
Two or three single-phase units can be connected in a V-connection for three-phase applications. Ensure the rated insulation of 12/42/75 kV matches your system requirements. Confirm the connection type with our engineering team before installation.
Q4: What international standards does this 11kV voltage transformer comply with?
The JDJ-11W complies with GB20840.3-2013 and IEC61869-3:2011 standards. These certifications guarantee performance for outdoor 11kV systems. Request specific test certificates and compliance documents from our sales team prior to shipment.
Q5: Are custom voltage ratios available for non-standard 11kV distribution networks?
Standard ratios include 10/0.1, 11/0.11, 10/0.22, and 11/0.22 kV. Custom voltage ratios and specific accuracy classes are available subject to factory confirmation. Please provide your detailed technical specifications for a customized quote.
Q6: What is the primary application of the JDJ-11W oil-filled transformer?
It is primarily used for voltage measurement and protection in outdoor switchgear, substations, and distribution points up to 11kV. The oil-immersed design provides high dielectric strength for demanding outdoor environments. Consult our catalog for more application details.
Q7: When should periodic maintenance be performed on this oil-immersed voltage transformer?
Periodic oil level and quality inspections are recommended to maintain optimal dielectric strength. The unit requires standard outdoor switchgear maintenance schedules. Contact our technical support for a detailed maintenance guideline.