10kV Silicon Steel Core Oil immersed Transformer

Oil Immersed Distribution Transformer

Product Introduction

Oil immersed transformers have stable and reliable insulation performance, effectively avoiding voltage fluctuations and interference. They have strong overload capacity, small size, light weight, and low operating noise. Not only are they easy to transport and install, but they can also reduce production and operating costs. They are high-performance distribution transformers.

1. Windings

The high and low voltage coils are wound using copper conductors, copper foil, and insulating materials. After being preheated and dried, they undergo vacuum drying in a vacuum drying device to remove moisture and gas from the insulation.They exhibit strong resistance to short-term overload.

2. Insulation

Between the layers of high and low voltage windings, pure natural wood fiber modified point glue paper is used, which can operate safely at 130°C; after winding completion, it undergoes thermal setting, forming a solid and rigid whole; The core body adopts a hybrid insulation system, with overall spacer blocks compressed to ensure the oil passages are unobstructed while enhancing the tight fit between the windings, core, and clamps. The core body is equipped with a positioning structure to prevent displacement during transportation. Additionally, all fasteners are fitted with lock nuts to ensure they do not loosen during long-term operation, meeting the requirement of a non-suspended core.

3. Core

The core utilizes high-quality, high-permeability, cold-rolled grain-oriented silicon steel sheets, with their surfaces covered by anti-corrosion insulating coatings. The silicon steel sheets undergo a 45-degree full oblique shear, and the joints between the core column and the yoke adopt a 7-step laminated structure. Simultaneously, the flatness of the silicon steel sheets is enhanced, and appropriate clamping force is applied to the iron core, effectively reducing transformer noise.

Product Standards

IEC 60076 - Power transformers – Part 1: General; Part 2: Temperature rise; Part 3: Insulation levels, dielectric tests and external clearances in air; Part 4: Guide to lightning-impulse and switching-impulse testing; Part 5: Ability to withstand short circuit; Part 7: Loading guide for oil-immersed power transformers; Part 10: Determination of sound levels; Part 20: Energy efficiency for liquid-immersed power transformers.

IEC 60214 - Tap-changers – Part 1: Performance requirements and test methods; Part 2: Application guide

IEC 60437 - Radio interference test on high-voltage insulators

IEC 60507 - Artificial pollution tests on high-voltage insulators to be used on a.c. systems

IEC 60137 - Insulated bushings for alternating voltages above 1 000 V

IEC 60404-1   - Magnetic Materials classifications

ANSI C57 12.90   - Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

IEC 60296 - Fluids for electrotechnical applications – Unused mineral insulating oils for transformers and switchgear

EN 50464-4 - Three-phase oil-immersed distribution transformers 50 Hz, 50 kVA to 2 500 kVA – Part 4: Requirements and tests for higher-loss transformers (HL) and higher-loss-high-short-circuit transformers (HLH)

10kV S13-M-30~2500/10 Transformer Technical Data

The data listed in the table above is for reference only, and the final data shall be subject to actual production.