# Baobian Electric (BTW) 1000 MVA 1000 kV Single-Phase UHV AC Autotransformer

> Baobian Electric (BTW) 1000 MVA 1000 kV Single-Phase UHV AC Autotransformer belongs to the UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV) category and is rated at 1000 MVA with 1000/500 kV primary/secondary voltage. Application: 1000 kV UHV Transmission Lines & Switchyards. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-BTW-UHV-1000M-1000K | Brand: Baobian Electric (BTW / Baoding Tianwei) | Category: Power & Energy Equipment / Transformers / High-Voltage & Transmission Power Transformers / UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV)

**Voltformer canonical:** https://voltformer.com/product/baobian-electric-btw-1000-mva-1000-kv-single-phase-uhv-ac-autotransformer - markdown version: https://voltformer.com/product/baobian-electric-btw-1000-mva-1000-kv-single-phase-uhv-ac-autotransformer.md

## Overview

Baobian Electric (BTW) 1000 MVA 1000 kV Single-Phase UHV AC Autotransformer is intended for 1000 kV UHV Transmission Lines & Switchyards. Configured electrical data: 1000 MVA, 1000/500 kV primary/secondary voltage, 50 Hz, 1-phase, vector group Auto / Ii0 and short-circuit impedance 18%. Construction: Cu-Cu OFHC; cooling: ODAF; loss class: Ecodesign Ultra-High Grid Tier. 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 kV UHV Transmission Lines & Switchyards
- **Target industries:** High-Voltage Grid Transmission, National Interconnected Power Grids, Nuclear Power Plants
- **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. / [UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV)](https://voltformer.com/category/power-transmission-transformers/uhv-ultra-high-voltage-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 1000 MVA |
| Primary / secondary voltage | 1000 kV / 500 kV (±8 x 1.25% OLTC) |
| Frequency / phases | 50 Hz / 1-phase - Auto / Ii0 |
| Short-circuit impedance (Uk) | 18% |
| No-load loss P0 | 142.00 kW |
| Load loss Pk | 810.0 kW |
| Calculated efficiency (power factor = 1) | 99.9% at 100% load; 99.93% at 50% load |
| Loss class | Ecodesign Ultra-High Grid Tier |
| Windings | Cu-Cu OFHC - cooling: ODAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 71 dB(A) |
| Mass and dimensions | 415000 kg - 11500×6300×10200 mm |
| Enclosure | IP55 - wheel gauge: 2800 mm |
| LI / AC withstand | 2400 kV peak / 1100 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
- GB/T 1094
- IEEE C57
- KEMA

## Accessories

**Included:** Fiber Optic Temperature Sensors, Online Gas DGA, Vacuum OLTC
**Optional:** Anti-Seismic Dampers, Fire Barrier

## 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: $2,750,000 – $3,400,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 60 months
- Compliance candidates: IEC 60076, GB/T 1094, IEEE C57, 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-BTW-UHV-1000M-1000K","quantity":1}]}
```

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