On Load Tap Changing Power Transformer Manufacturers – OLTC Specialists
Subian Electric manufactures on load tap changing power transformers – OLTC units from 1000 kVA to 63000 kVA, 35 kV to 132 kV class – at our 50,000-square-metre factory in Xuzhou, Jiangsu, China. Our 350+ employees have served utilities in 50+ countries since 2019.
As a factory-direct manufacturer and supplier, we provide OLTC transformers with factory pricing, voltage regulation engineering and complete test documentation.
Send your voltage, capacity and regulation requirements. Our export team will respond with a quotation and technical proposal.
2019年以降 · 50,000m² · 350人以上のスタッフ
On Load Tap Changing Power Transformers We Manufacture
OLTC power transformers from 1000 kVA to 63000 kVA, 35 kV to 132 kV class, with voltage regulation for grid and industrial substations.
What Is an On Load Tap Changing Power Transformer?
An on load tap changing (OLTC) power transformer adjusts its ratio under load, holding output voltage within tolerance as the network voltage varies. It is essential for transmission, regional distribution and large industrial supplies.
Utilities and large industrial customers specify OLTC transformers where voltage stability matters – grid interconnection, regional substations and continuous process plants.
- On-load voltage regulation – ratio adjusted under load to hold output voltage.
- 1000 kVA – 63000 kVA – capacity range for grid and industrial duty.
- 35-132 kV class – voltage classes for regional supply.
- 50,000m²工場 – in-house winding, vacuum drying and testing.
- 350人以上の従業員 – engineering, production and export teams.
- OEM / ODM & 卸売 – カスタムブランディング、パッケージング、ボリューム供給。.
Main Types of OLTC Power Transformers
We manufacture OLTC transformers in three configurations:
Grid power transformer
35-132 kV class units for regional distribution and interconnection.
Industrial power transformer
OLTC units for continuous process plants and large loads.
Substation transformer
Complete units for transmission and distribution substations.
OLTC Power Transformer Specifications
| パラメータ | 仕様 |
|---|---|
| 定格電圧 | 35 kV – 132 kV class |
| 定格容量 | 1000 kVA – 63000 kVA |
| Tap changer | On-load, ±8×1.25% typical |
| 周波数 | 50/60 Hz |
| 冷却 | ONAN / ONAF / OFAF |
| 標準 | IEC 60076 / GB 1094 |
OLTC Transformer Manufacturing at Our 50,000 m² Factory
From winding to OLTC integration, vacuum drying, oil filling, assembly and testing – every unit is built and tested at our Xuzhou facility.
OEM/ODM & Wholesale OLTC Power Transformer Supply
Utilities and distributors can brand or resell OLTC units with custom nameplates, packaging and documentation.
OEM / ODM
工場直送
当社の標準プラットフォームに基づいて構築されたカスタムブランディング、パッケージング、製品バリアント – 名札から完全な製品設計まで。.
カスタム名札 · カスタムパッケージ · 完全な試験書類
卸売供給
ボリューム価格
柔軟なコンテナ数量、コンテナごとの混合モデル、ボリュームバイヤーおよび輸入業者向けの信頼できるグローバル配送を伴う工場価格。.
コンテナMOQ · 混合モデル · グローバル配送
ディストリビューターサポート
チャンネルパートナー
ディストリビューターおよびプロジェクトクライアント向けの専任アカウント管理、技術文書、優先生産。.
アカウントマネージャー · 販売資料 · 優先リードタイム
On Load vs No Load Tap Changing Transformers
OLTC transformers regulate voltage continuously under load, protecting downstream equipment and improving power quality – at higher cost and maintenance. No-load units are simpler and cheaper where voltage is stable.
The choice follows your network’s voltage profile; we build both and confirm the right configuration on drawings.
Choosing an On Load Tap Changing Power Transformer Manufacturer
OLTC transformers demand higher engineering: tap winding design, OLTC integration and thermal performance. Verify type test evidence and utility reference deliveries.
Subian Electric offers a 50,000m² factory, 350+ employees, ISO9001, CE and UL certification and export to 50+ countries with OLTC engineering capability.
Request a quotation with your voltage, capacity and regulation requirements – we confirm the design before production.
認証 & 品質保証
Our OLTC transformers are produced under ISO9001, ISO14001 and ISO45001 management systems, with CE and UL certification and type test reports to 110 kV class.
製品認証
On Load Tap Changing Transformer FAQ
Common questions about OLTC power transformers and factory sourcing.
オンロードタップチェンジャーとは何ですか？
When do I need an OLTC transformer?
What tap ranges are available?
What maintenance does an OLTC require?
How does an on-load tap changer work?
What are your delivery terms?
Contact Subian
Need the Right Specification?
Tell us your target market, product type, quantity and technical requirements. Our team will help you identify a suitable configuration for your project.