# Taikai 240 MVA 220/110/35 kV Three-Winding On-Load Tap-Changing (OLTC) Transmission Power Transformer

> Taikai 240 MVA 220/110/35 kV Three-Winding On-Load Tap-Changing (OLTC) Transmission Power Transformer belongs to the Substation Step-Down Power Transformers (110-330 kV) category and is rated at 240 MVA with 220/110 kV primary/secondary voltage. Application: 220 kV National Grid & Heavy Industry Main Supply Switchyards. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-TK-PWR-240M-220K | Brand: Taikai Transformer (Taikai Group) | Category: Power & Energy Equipment / Transformers / High-Voltage & Transmission Power Transformers / Substation Step-Down Power Transformers (110-330 kV)

**Voltformer canonical:** https://voltformer.com/product/taikai-240-mva-220-110-35-kv-three-winding-on-load-tap-changing-oltc-transmission-power-transformer - markdown version: https://voltformer.com/product/taikai-240-mva-220-110-35-kv-three-winding-on-load-tap-changing-oltc-transmission-power-transformer.md

## Overview

Taikai 240 MVA 220/110/35 kV Three-Winding On-Load Tap-Changing (OLTC) Transmission Power Transformer is intended for 220 kV National Grid & Heavy Industry Main Supply Switchyards. Configured electrical data: 240 MVA, 220/110 kV primary/secondary voltage, 50 Hz, 3-phase, vector group YNyn0d11 and short-circuit impedance 14%. Construction: Copper (Cu-Cu); cooling: ONAN/ONAF/ODAF; loss class: State Grid Ultra Low Loss Transmission Grade. These values support preliminary engineering selection; verify insulation levels, thermal limits, short-circuit duty, installation conditions and applicable standards against the manufacturer datasheet and the site study.

- **Application:** 220 kV National Grid & Heavy Industry Main Supply Switchyards
- **Target industries:** Regional Transmission Substations, Mega Industrial Zone Main Infeeds, Steel Manufacturing Works
- **Brand:** [Taikai Transformer (Taikai Group)](https://voltformer.com/brand/taikai-transformer.md) - A key transmission supplier to the State Grid Corporation of China; Taikai Transformer manufactures 750 kV, 500 kV, 220 kV and 110 kV high-voltage power transformers, reactors and truck-mounted comple
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [High-Voltage & Transmission Power Transformers](https://voltformer.com/category/power-transmission-transformers.md): 5 MVA–1000 MVA 110 kV, 154 kV, 380 kV, 500 kV and 1000 kV UHV AC/DC transmission and interconnection power transformers. / [Substation Step-Down Power Transformers (110-330 kV)](https://voltformer.com/category/power-transmission-transformers/substation-step-down-power-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 240 MVA |
| Primary / secondary voltage | 220 kV / 110 kV (±8 x 1.25% OLTC) |
| Frequency / phases | 50 Hz / 3-phase - YNyn0d11 |
| Short-circuit impedance (Uk) | 14% |
| No-load loss P0 | 68.00 kW |
| Load loss Pk | 420.0 kW |
| Calculated efficiency (power factor = 1) | 99.8% at 100% load; 99.86% at 50% load |
| Loss class | State Grid Ultra Low Loss Transmission Grade |
| Windings | Copper (Cu-Cu) - cooling: ONAN/ONAF/ODAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 68 dB(A) |
| Mass and dimensions | 175000 kg - 8200×4600×7200 mm |
| Enclosure | IP55 - wheel gauge: 2000 mm |
| LI / AC withstand | 950 kV peak / 395 kV rms - partial discharge: 5 pC |
| Environment | -25°C / +40°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Direct Copper Busbar Terminals (Busbar Integrated / IP00-IP31) |

## Standards

- IEC 60076
- IEEE C57
- TS EN 60076
- KEMA

## Accessories

**Included:** MR Vacuum OLTC Tap Selector, Online DGA 9-Gas Analyzer, Buchholz Relay
**Optional:** Optical Fiber Temperature Sensors

## Official sources

- https://www.taikaitransformer.com/

- **Source scope:** manufacturer-family
- **Last reviewed:** 2026-09-13

Manufacturer portfolio/family source. Confirm the exact order code, guaranteed ratings and project-specific options against the current OEM datasheet before procurement or an SLD study.

## Pricing & Logistics

- Pricing type: RFQ (Project Engineering) - Indicative range: $1,050,000 – $1,280,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 48 months
- Compliance candidates: IEC 60076, IEEE C57, TS EN 60076, KEMA. Verify applicability and conformity against the exact offered model and project jurisdiction.

## RFQ

Request a formal factory quotation via Voltformer RFQ:

```json
POST https://voltformer.com/api/v1/rfq
{"companyName":"Example Energy","email":"procurement@example.com","items":[{"skuOrId":"VF-TK-PWR-240M-220K","quantity":1}]}
```

Full catalog JSON: https://voltformer.com/agent-catalog.json - OpenAPI: https://voltformer.com/openapi.json