Oil Immersed Combined Instrument Transformer

This oil immersed combined instrument transformer (model JLS-10) is designed for accurate metering and protection in medium-voltage power systems. It integrates voltage and current measurement functions into a single oil-filled unit, making it widely applicable in outdoor distribution networks, substations, and industrial power monitoring systems. The structure adopts a sealed oil-immersed insulation design to ensure stable operation under long-term load conditions and harsh environmental exposure.

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Overview and Application Scope

The Oil Immersed Combined Instrument Transformer is engineered to perform simultaneous voltage and current transformation for electrical metering and relay protection. It is suitable for 6kV, 10kV, and 35kV distribution systems, especially in outdoor substations, compact transformer stations, and industrial power grids where reliability and insulation strength are critical.

By integrating multiple measurement functions into one structure, it reduces installation space and improves system wiring efficiency, making it a preferred solution for modern smart grid applications.

Technical Specifications

Technical parameters of the voltage section of JLS-35, 10, 6, and 3 oil-immersed combined instrument transformers

Technical parameters of the current section of JLS-35, 10, 6, and 3 oil-immersed combined instrument transformers

Product Structure Advantages

It adopts a fully sealed oil tank structure, ensuring excellent insulation performance and strong resistance to moisture, dust, and environmental pollution. The core is made of high-quality silicon steel to minimize energy loss, while precision copper windings ensure stable current transmission and accurate measurement output.

Compared with conventional separate transformers, this Oil Immersed Combined Instrument Transformer significantly reduces wiring complexity and improves installation efficiency in outdoor substations and metering cabinets.

Installation Environment

1. Suitable for outdoor or indoor installation in distribution systems

2. Ambient temperature: -25℃ to +40℃

3. Altitude: ≤1000m (higher altitude requires customized design)

4. Applicable in environments free from corrosive gas, heavy pollution, or severe vibration

Product dimensions diagram

FAQ

Q1: What is the main function of an Oil Immersed Combined Instrument Transformer?
A: It integrates voltage and current measurement in one unit, providing accurate metering and relay protection for medium-voltage power systems such as substations and distribution networks.

Q2: Where is this transformer typically installed?
A: It is commonly used in outdoor substations, compact transformer stations, industrial power distribution systems, and metering cabinets requiring stable energy measurement.

Q3: What voltage levels can this equipment support?
A: Standard models support 3kV, 6kV, 10kV, and 35kV systems, making it suitable for a wide range of medium-voltage applications.

Q4: What are the advantages of oil-immersed insulation?
A: Oil insulation provides excellent dielectric strength, heat dissipation, and long-term operational stability, especially in harsh outdoor environments.

Q5: How often does it require maintenance?
A: The structure is fully sealed, so it requires minimal maintenance. Regular inspection of oil condition and terminal connections is recommended.

Q6: Can it be customized for different current ratios?
A: Yes, current ratios and secondary parameters can be customized according to project requirements to match different metering and protection systems.