JDJ Series Oil-Immersed Voltage Transformers Overview

The JDJ Series High Voltage Transformers (including models JDJ-3, JDJ, JDJ-10) are designed for 10kV power systems with a rated frequency of 50Hz. These oil-immersed transformers are primarily used for electric energy metering, voltage measurement, and relay protection in high-voltage power distribution systems. They offer reliable and stable performance, meeting international standards for precision and durability. With their robust design, they ensure optimal operation even in harsh conditions, providing long-term reliability in critical infrastructure.

JDJ-10 Voltage Transformers Type designation

The Key Features and Structure of JDJ Voltage Transformer:

• J: Represents “Voltage Transformer.”
• D: Denotes “Single-phase” configuration.
• J: Indicates the oil-immersed design, providing enhanced insulation and durability.
• 3, 6, 10: Refers to the voltage levels (3kV, 6kV, 10kV).

This model designation clearly explains the JDJ Voltage Transformer, emphasizing its oil-immersed design, single-phase configuration, and compatibility with different voltage levels for reliable power system applications.

Service Conditions for JDJ-6, JDJ-10 Voltage Transformers

1. Altitude: Not exceeding 1000 meters.
2. Ambient Temperature: -5°C to +40°C.
3. Relative Humidity: Less than 85% at 20°C.
4. Vibration Test: The product has passed the direct vibration test with an intensity of 0.4g, equivalent to a nine-degree earthquake on the Richter scale.

These conditions ensure reliable operation in typical environmental and mechanical stress scenarios.

Construction Details of JDJ-3, JDJ-6, 10 Voltage Transformers

JDJ-6, JDJ-10  series of voltage transformers features an oil-immersed insulation structure. The core is constructed using laminated sheets, with primary and secondary windings concentrically wound on the same core. The transformer body is securely fixed to the cover and placed within the oil tank. The tank is filled with insulating transformer oil, maintaining a distance of 10-15mm between the oil surface and the tank cover. The winding leads are brought out through high- and low-voltage bushings on the cover for installation and wiring purposes. The cover and tank are sealed to prevent oil leakage, and the cover is equipped with an oil-filling plug for maintenance.

This design ensures excellent insulation, reliable performance, and easy installation, while providing enhanced protection against environmental factors.

Technical Parameters of JDJ-3, JDJ-6, JDJ-10  PT

Scheme of connection

Outline and Dimensions of Installation

Note: This page provides detailed information about the JDJ Series Oil-Immersed Voltage Transformers (including models JDJ-3, JDJ-6, JDJ-10), covering key features, construction details, service conditions, technical parameters, and installation dimensions. These transformers are designed for reliable operation in high-voltage power systems, ensuring precise energy metering, voltage measurement, and protection. For further assistance with model selection, technical queries, or customized solutions for non-standard applications, please feel free to contact our expert team.

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