Description of JLS-35 Outdoor Oil-Immersed Combined Transformer

The JLS-35 is a Outdoor Oil-Immersed combined transformer , also referred to as a Oil-Immersed high-voltage metering tank, is a sophisticated outdoor power measuring device comprising two sets of single-phase, wholly insulated voltage transformers. It adopts a three-phase V/V wiring structure with two current transformers separately series-connected to A and C phases.

This upgraded model includes a moisture-proof device installed on the oil tank’s cover, effectively preventing external humidity from penetrating the oil. Such an enhancement significantly prolongs the product’s service life. Additionally, it boasts larger capacity, reduced volume, and lighter weight compared to previous models, simplifying installation and maintenance.

Designed for specific outdoor circuits of AC50-60Hz with a rated voltage of 35kV or below, this product ensures reliable metering of current, voltage, and electric energy. It is an ideal choice for rural power grids, outdoor transformer substations, miniature substations, and industrial applications. By integrating active and reactive energy meters, it is widely recognized as a high-voltage power metering tank suitable for modern requirements.

Type Designation for JLS-35 Combined Transformer

• J: Volt Transformer
• L: Current Transformer
• S: Three-phase, Oil-Immersed Type
• 35: Rated Voltage Class (kV)

This concise designation highlights the structural and functional attributes of the JLS-35 Model, designed for advanced metering and monitoring applications in high-voltage systems.

Construction of JLS-35 Combined Transforme The oil tank

The JLS-35 Outdoor Oil-Immersed Combined Transformer (also known as a metering tank) integrates two single-phase voltage transformers (PT) and two current transformers (CT), both of which are electromagnetic type. These transformers are securely mounted on the pole plate of the oil tank. The oil tank cover is seamlessly connected and equipped with two lifting rings for easy handling and transportation.

The oil tank is designed with a compact and quadrate structure, featuring an oil-meter indicator for monitoring, a grounding bolt for safety, and a fuel outlet valve for easy maintenance. The high-quality construction ensures reliability, durability, and enhanced performance for metering and energy distribution systems in outdoor applications. This transformer is ideal for rural and industrial power networks, delivering stable and precise voltage and current measurements.

Technical Data for JLS-35 Combined Transformer

1. The metering tank complies with GB20840.4-2015 standards for combined transformers.
2. Current transformer meets the provisions outlined in GB20840.2-2014 and GB20840.1-2010.
3. Voltage transformer adheres to the standards in GB20840.3-2013 and GB20840.1-2010.
4. Zinc oxide arresters must be installed within one meter of the installation site to ensure effective lightning protection.

Outline and Dimensions of Installation

Accuracy Classes: 0.2 class, 0.2S class

When Ordering JLS-35 Combined Transformer, Please Specify the Following:

1. Model and Voltage Ratio: Clearly indicate the model (e.g., JLS-35) and the required voltage ratio to ensure compatibility with your system.
2. Accuracy Class and Secondary Output: Specify the required accuracy class (e.g., 0.2 or 0.2S) and the secondary output parameters to meet precise metering requirements.
3. Insulation Class and Service Conditions: Provide details about the insulation class and the environmental conditions, such as temperature range, altitude, and pollution level, for optimal product performance.
4. Customization for Special Applications: For unique operational scenarios, the outer iron box dimensions and materials can be customized. Additionally, specific requirements for PT and CT parameters, such as precision, current ratio, or additional features, are also available for customization.

FAQs for JLS-35 Oil-Immersed Combined Transformer

1. What applications are ideal for the JLS-35 Combined Transformer?
   This transformer is suitable for 35kV power systems in rural grids, outdoor substations, miniature substations, and industrial power networks requiring accurate energy metering and reliable relay protection.
2. How does the moisture-proof device enhance durability?
   The device prevents external humidity from penetrating the oil tank, protecting internal components and significantly extending the transformer’s lifespan.
3. Can the JLS-35 transformer be customized for unique requirements?
   Yes, customization options include voltage/current ratios, accuracy classes, outer iron box dimensions, and additional safety features to meet specific operational needs.
4. What maintenance is required for the JLS-35 transformer?
   Periodic oil level checks, seal inspections, and cleaning of external components are necessary to ensure optimal performance and longevity.
5. What safety standards does the JLS-35 transformer meet?
   It complies with GB20840.4-2015 and related standards and supports the installation of zinc oxide arresters for enhanced lightning protection.
6. Why choose the JLS-35 over traditional transformers?
   Its oil-immersed design offers superior cooling, accurate energy metering, and enhanced durability, making it a cost-effective solution for modern high-voltage power systems.

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