# Baobian Electric 50 MVA 220/27.5 kV HSR High-Speed Train Scott Traction Transformer

> Baobian Electric 50 MVA 220/27.5 kV HSR High-Speed Train Scott Traction Transformer belongs to the Railway & Traction Transformers category and is rated at 50 MVA with 220/27.5 kV primary/secondary voltage. Application: 350 km/h High-Speed Rail 2x25 kV Traction Supply. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-BTW-TRAC-50M-220K | Brand: Baobian Electric (BTW / Baoding Tianwei) | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / Railway & Traction Transformers

**Voltformer canonical:** https://voltformer.com/product/baobian-electric-50-mva-220-27-5-kv-hsr-high-speed-train-scott-traction-transformer - markdown version: https://voltformer.com/product/baobian-electric-50-mva-220-27-5-kv-hsr-high-speed-train-scott-traction-transformer.md

## Overview

Baobian Electric 50 MVA 220/27.5 kV HSR High-Speed Train Scott Traction Transformer is intended for 350 km/h High-Speed Rail 2x25 kV Traction Supply. Configured electrical data: 50 MVA, 220/27.5 kV primary/secondary voltage, 50 Hz, 3-phase, vector group configuration-specific vector group and short-circuit impedance 10.5%. Construction: Copper (Cu-Cu); cooling: ONAN/ONAF; loss class: Railway High Dynamic 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:** 350 km/h High-Speed Rail 2x25 kV Traction Supply
- **Target industries:** High-Speed Rail Networks, Railway Electrification, Metros & Underground Rail
- **Brand:** [Baobian Electric (BTW / Baoding Tianwei)](https://voltformer.com/brand/baobian-electric-btw.md) - Global UHV power manufacturer specializing in nuclear power plants (1000 MW nuclear GSU generator transformers), 1000 MVA 1000 kV single-phase interconnection autotransformers, 500 kV shunt reactors a
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [Special Industrial & Process Transformers](https://voltformer.com/category/special-industrial-process-transformers.md): Arc furnace (EAF), green hydrogen electrolyser, rectifier, traction and mining Ex-proof transformers. / [Railway & Traction Transformers](https://voltformer.com/category/special-industrial-process-transformers/railway-traction-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 50 MVA |
| Primary / secondary voltage | 220 kV / 27.5 kV (±4 x 2.5% OLTC) |
| Frequency / phases | 50 Hz / 3-phase - Scott-connected 3/2 phase |
| Short-circuit impedance (Uk) | 10.5% |
| No-load loss P0 | 28.00 kW |
| Load loss Pk | 195.0 kW |
| Calculated efficiency (power factor = 1) | 99.56% at 100% load; 99.69% at 50% load |
| Loss class | Railway High Dynamic Grade |
| Windings | Copper (Cu-Cu) - cooling: ONAN/ONAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 65 dB(A) |
| Mass and dimensions | 62000 kg - 5600×3400×4900 mm |
| Enclosure | IP55 - wheel gauge: 1435 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
- IEC 60310
- EN 50329

## Accessories

**Included:** Scott Phase Balancing Relay, Buchholz Relay, MR Tap Selector
**Optional:** Online Railway Harmonic Monitoring

## Official sources

- https://www.btwelectric.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 (On Request) - Indicative range: $420,000 – $520,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076, IEC 60310, EN 50329. 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-BTW-TRAC-50M-220K","quantity":1}]}
```

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