220kv Power Transformer

Overseas Project Cases

This 10MVA 230 kV Power transformer is for bitcoin mining in Houston. It was manufactured in our factory in Jiangsu Province and it complies with IEEE standards.

This 20/30MVA 220 kV power transformer was manufactured for a power station in Ecuador.

Daelim 220 kV/230 kV transformer, use Japanese Toshiba analysis software and our company's special calculation and validation procedures for the transformer core, winding, implement body, lead, fuel tanks, etc. Parts of the optimal design and carrying on the Omni-directional validation, ensure product performance. Superior process equipment, elaborate material selection, and efficient manufacturing make the transformer have small volume, lightweight, low loss, low partial discharge, low noise characteristics. The product quality is superior, energy conservation and environmental protection, easy installation and maintenance, reliable operation, and effectively reduced product running costs.

Daelim offers transformer solutions such as high efficiency, environmentally friendly, maximum short-circuit strength, overload capability, high-temperature operation, reliable start-up after a power outage, and low maintenance costs solutions, applied in renewable projects, urban substations, utilities, industrial applications, etc.

Daelim Advantages

• Prompt preparation of bids

• Optimized, consistent end-to-end project management

• Noticeably shorter production and delivery times

• Very high delivery reliability

• Fast, standardized documentation

• Just-in-time delivery

220kV/230kV Transformer Details

Core Assembly

The iron core of the 220kV/230kV power transformer is made of cold rolled, granular-oriented, low-loss, and high magnetic conductive silicon steel sheet, which is of multi-step completely tilted structure to reduce the loss and noise.

Iron core with fixed clamps optimizes the design so as to ensure mechanical strength and reduce leakage losses.

The adoption of PET banding structure ensures the damp force of the core column and lowers the noise.

Coil Winding

Daelim 220kV and 230kV transformer HV winding adopt entanglement or inner screened continuous type with phase insulation structure to ensure insulating strength.

MV/LV windings adopt high strength or adhibit-transposition conductors and forced cooling to reduce the temperature rise and enhance the capability of short circuit withstand.

Interleaved, shielded disc, helical, disc, or layer construction (depending on voltage and impulse rating)

Active- parts Assembly

Cold pressing ensures the cleanness of the body's active parts and the reliability of leads.

Daelim 220kV and 230kV transformer uses the entire assembly and insulation material to reduce the assembly time and effectively ensure the size and shape of the insulating structure.

HV lead adopts specially molded insulation parts for protection which effectively guarantees its insulating strength and reduces partial discharge.

Vapor phase

Daelim's modern vapor phase system is the quickest and most effective way to dry transformers.

This process ensures the perfect drying of the 220kV transformer, which brings a longer transformer life. Compared with non-steam, the drying of steam will also be reduced by more than 50 %.

Passing this time savings along the production schedule results in quicker delivery.

Oil Tank

The 220 kV 230 kV transformer fuel tank uses the three-dimensional finite element strength analysis and Pro-E mold, which enhances mechanical strength.

Adopting of welding automatic submerged arc-welding and ultrasonic fluorescence leakage test to guarantee leakage free.

The surface coating is strictly controlled.

Laboratory Test

220 kV 230 kV transformers testing according to ANSI / IEEE C57.12 I IEC 60076 Standards.

Oil Laboratory

The oil in 220KV 230KV Transformer is based on ASTMD-3487 /2002 / IEC 60296 / IEEE C57.106-2002 / IEC 60422 standards for physical and chemical analysis and chromatography.

220 kV transformer specification

220 kV Power Transformer Standard Features

Optional Accessories

Below are optional accessories for Daelim 220kV and 230kV transformers.

Quality & Certification System

DAELIM BELEFIC transformer manufacturing processes are standardized under the norm of ISO 9001:2015 quality, allowing us to have greater control over the production

We offer a full range of testing compliant with ANSI C57.12 and CSA C88-M90 standards, as well as, specialty testing such as lightning impulse, sound, heat run, partial discharge, and SFRA.

Service & Support

DAELIM BELEFIC will work with you to identify your transformer needs and customize the solution. Once we know your exact requirements, our engineers will quickly recommend the right solution based on your specific needs.

Expertise&consulting&: To meet performance requirements we are able to incorporate short circuit strength improvements, kVA upgrades, voltage changes, reduced losses, LTC modernization, sound level reduction, and tank modification. Our engineering team responds fast to answer technical questions from our customers.

1. Factory-to-Jobsite logistics support Delivery by ship and truck, the impact recorders measure and store three-axis impact data, identifying any abnormally severe impacts that might have caused damage to the transformer during transportation.
2. On-Site Technical Assistance: In Assembly, Oil Treatment, Testing, and Commissioning (Energization) by an Engineer 
3. Training:by a Factory Specialist, about the operation and maintenance
4. Repair: Our technicians replace gaskets, broken bushings, and accessories, purify or replace the oil, sand, prime, and repaint the unit. When complete, the unit is fully tested.