# Baobian Electric DFP-400 MVA / 525 kV Nuclear Power Plant Generator Step-Up Transformer

> Baobian Electric DFP-400 MVA / 525 kV Nuclear Power Plant Generator Step-Up Transformer belongs to the Generator Step-Up Transformers (GSU) category and is rated at 400 MVA with 525/24 kV primary/secondary voltage. Application: 1000 MW Nuclear & Thermal Generator Step-Up (GSU). Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-BTW-NUC-400M-500K | Brand: Baobian Electric (BTW / Baoding Tianwei) | Category: Power & Energy Equipment / Transformers / High-Voltage & Transmission Power Transformers / Generator Step-Up Transformers (GSU)

**Voltformer canonical:** https://voltformer.com/product/baobian-electric-dfp-400-mva-525-kv-nuclear-power-plant-generator-step-up-transformer - markdown version: https://voltformer.com/product/baobian-electric-dfp-400-mva-525-kv-nuclear-power-plant-generator-step-up-transformer.md

## Overview

Baobian Electric DFP-400 MVA / 525 kV Nuclear Power Plant Generator Step-Up Transformer is intended for 1000 MW Nuclear & Thermal Generator Step-Up (GSU). Configured electrical data: 400 MVA, 525/24 kV primary/secondary voltage, 50 Hz, 1-phase, vector group YNd11 and short-circuit impedance 14.5%. Construction: Cu-Cu CTC; cooling: ODAF; loss class: Nuclear Grade Ultra High Reliability. 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:** 1000 MW Nuclear & Thermal Generator Step-Up (GSU)
- **Target industries:** Nuclear Power Plants, Mega Thermal Power Stations, High-Voltage Grid Transmission
- **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** / [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. / [Generator Step-Up Transformers (GSU)](https://voltformer.com/category/power-transmission-transformers/generator-step-up-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 400 MVA |
| Primary / secondary voltage | 525 kV / 24 kV (±2 x 2.5% NLTC) |
| Frequency / phases | 50 Hz / 1-phase - YNd11 |
| Short-circuit impedance (Uk) | 14.5% |
| No-load loss P0 | 95.00 kW |
| Load loss Pk | 480.0 kW |
| Calculated efficiency (power factor = 1) | 99.86% at 100% load; 99.89% at 50% load |
| Loss class | Nuclear Grade Ultra High Reliability |
| Windings | Cu-Cu CTC - cooling: ODAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 69 dB(A) |
| Mass and dimensions | 260000 kg - 8800×4800×7900 mm |
| Enclosure | IP55 - wheel gauge: 2000 mm |
| LI / AC withstand | 1550 kV peak / 680 kV rms - partial discharge: 20 pC |
| Environment | -25°C / +40°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | RIP (Resin Impregnated Paper) Dry Condenser High-Voltage Bushing |

## Standards

- IEC 60076
- ASME N-Type
- IEEE C57

## Accessories

**Included:** Nuclear-Grade Protection, Online Fiber Optic Temperature, DGA Analyzer
**Optional:** ASME NQA-1 Full Certification Package

## 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 (Project Engineering) - Indicative range: $1,450,000 – $1,800,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 60 months
- Compliance candidates: IEC 60076, ASME N-Type, IEEE C57. 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-NUC-400M-500K","quantity":1}]}
```

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