S13-200kVA 35kV/0.4kV Three Phase Oil Immersed Station Service Transformer Dyn11

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S13-200kVA 35kV/0.4kV Three Phase Oil Immersed Station Service Transformer Dyn11

The YAWEI S13-200kVA is a three-phase oil-immersed station service transformer designed to supply low-voltage auxiliary power for substations and electrical installations. With a rated capacity of 200kVA, a primary voltage of 35kV, and a secondary voltage of 0.4kV, this transformer provides a step-down power supply for auxiliary equipment and associated electrical systems.

The transformer features 100% copper windings, Karamay No. 45 transformer oil, a Dyn11 vector group, and a specified impedance voltage of 6.5%. A zero-sequence current transformer is included to support the specified ground-fault monitoring or protection scheme, subject to the project's protection design.

Designed for project-specific requirements, the S13-200kVA station service transformer can be supplied with associated accessories, technical documentation, instruction manuals, and test reports. YAWEI supports technical coordination to confirm the required insulation level, installation altitude, energy-efficiency requirements, protection configuration, and applicable standards before production.

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Model:
s13-200kva-35kv-04kv-station-service-transformer
Brand:
YAWEI

S13-200kVA transformer 200kVA station service transformer 35kV to 400V transformer

PRODUCT CATEGORY

>> Product Advantages

>> Technical Parameters

>> Product Uses

>> Product Operation Guide

Reliable Station Auxiliary Power

The YAWEI S13-200kVA station service transformer is designed to step down 35kV medium-voltage power to 0.4kV for auxiliary electrical systems. Its 200kVA capacity provides a practical solution for substation auxiliary loads and other installations requiring a dedicated low-voltage supply. The oil-immersed design combines electrical insulation and heat dissipation to support dependable operation under specified service conditions.

Copper Windings and Insulation System

Built with 100% copper windings, the transformer is configured for the specified electrical ratings and project requirements. Karamay No. 45 transformer oil is specified as the insulating and cooling medium. The Dyn11 vector group and 6.5% impedance voltage define important electrical characteristics for system integration and must be verified against the approved technical specification.

Zero-Sequence Current Monitoring

A zero-sequence current transformer is included according to the stated project requirements. This component can provide residual-current measurement for compatible ground-fault detection and protection schemes. Its installation location, transformation ratio, secondary rating, accuracy class, and connection arrangement should be confirmed with the customer's protection and control design.

Technical Documentation and Project Support

Project documentation can include transformer and accessory instruction manuals, test reports, and relevant technical records. As specified, eight hard copies of the instruction manuals and test reports for all components are to be provided, with electronic files submitted to the commercial department. Manufacturing details, nameplate information, efficiency classification, and altitude requirements should be reviewed and approved before production and document release.

>> Technical Parameters

Type	Three Phase Oil-immersed Distribution Transformer
Model	S13-200kVA
Installation	Outdoor
Altitude	1,100m, as specified
Rated Power	200KVA or others
Cooling Method	ONAN
Primary Voltage	35KV
Secondary Voltage	400V or others
Rated Frequence	50/60HZ
Insulation oil	Mineral oil
Tapping Range	±2×2.5%/±5%
Temperature rise℃)	65
Connection Group	Dyn11/Yyn0
Total weight(kg)	1700

Technical clarification required: The manufacturing requirements specify S13 with positive deviation, while the documentation and nameplate requirements specify S22 with negative deviation. These are not necessarily equivalent efficiency or loss specifications. Confirm the applicable efficiency standard, guaranteed no-load and load losses, nameplate requirements, and test-report consistency with the engineering team before publishing these details as standard product specifications.

1. Substation Auxiliary Power Supply

Provides 400V low-voltage power for compatible auxiliary equipment in substations, subject to the project's load calculation and protection design.

2. Electrical Switching Stations

Suitable for auxiliary power distribution in switching stations and related electrical facilities that require a dedicated medium-voltage step-down transformer.

3. Utility Distribution Infrastructure

Can support auxiliary electrical systems associated with utility distribution projects and grid infrastructure.

4. Industrial Electrical Facilities

Applicable to industrial installations with 35kV incoming power and auxiliary loads compatible with a 200kVA, 0.4kV transformer.

5. Infrastructure and Power Projects

Can be considered for infrastructure developments requiring station auxiliary power, provided that the electrical ratings, insulation requirements, installation conditions, and protection scheme are compatible with the project.

Installation, Operation and Maintenance Guide