# GE Vernova 1000 MVA 550 kV Generator Step-Up Transformer

> High-output GE Vernova generator transformer family for nuclear, thermal and hydroelectric stations.

> SKU: VF-GEV-GSU-1000M-550K | Brand: GE Vernova (General Electric) | Category: Power & Energy Equipment / Transformers / High-Voltage & Transmission Power Transformers / Generator Step-Up Transformers (GSU)

**Voltformer canonical:** https://voltformer.com/product/ge-vernova-1000-mva-550-kv-generator-step-up-transformer - markdown version: https://voltformer.com/product/ge-vernova-1000-mva-550-kv-generator-step-up-transformer.md

## Overview

GE Vernova 1000 MVA 550 kV Generator Step-Up Transformer is intended for 500 kV Grid Connection Points for Large Power Plants. Configured electrical data: 1000 MVA, 550/24 kV primary/secondary voltage, 50 Hz, 3-phase, vector group YNd11 and short-circuit impedance 16%. Construction: Copper (Cu-Cu); cooling: ONAF; loss class: JEC / IEC SOTA GSU. 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:** 500 kV Grid Connection Points for Large Power Plants
- **Target industries:** Nuclear Power Plants, Combined-Cycle Gas Turbine (CCGT) Power Plants, Mega Hydroelectric Power Plants (HPP)
- **Brand:** [GE Vernova (General Electric)](https://voltformer.com/brand/ge-vernova.md) - GE Vernova Grid Solutions provides high-performance protection, control, and automation solutions including the renowned Multilin 8 Series and MiCOM Agile product lines.
- **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 | 1000 MVA |
| Primary / secondary voltage | 550 kV / 24 kV (OLTC/DETC - project configured) |
| Frequency / phases | 50 Hz / 3-phase - YNd11 |
| Short-circuit impedance (Uk) | 16% |
| No-load loss P0 | 220.00 kW |
| Load loss Pk | 1700.0 kW |
| Calculated efficiency (power factor = 1) | 99.8084% at 100% load; 99.8712% at 50% load |
| Loss class | JEC / IEC SOTA GSU |
| Windings | Copper (Cu-Cu) - cooling: ONAF - insulation: Class A (105°C) |
| Temperature rise | 65 K - sound pressure: 70 dB(A) |
| Mass and dimensions | 320000 kg - 11200×6400×8200 mm |
| Enclosure | IP55 outdoor - wheel gauge: 2000 mm |
| LI / AC withstand | 1375 kV peak / 660 kV rms - partial discharge: 30 pC |
| Environment | -25°C / +45°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | 500 kV RIP Kondenser Bushing |

## Standards

- IEC 60076
- IEEE C57
- JEC

## Accessories

**Included:** Oil temperature indicator, Pressure relief device, Online monitoring interface
**Optional:** OLTC, Online DGA, Bushing monitoring

## Official sources

- https://www.gevernova.com/electrification/equipment/transformers/generator-step-transformers
- https://www.gevernova.com/grid-solutions/sites/default/files/resources/products/brochures/power_transformers/power_transformer_range-brochure-en-2019-06-grid-ptr-0189.pdf
- https://www.gevernova.com/electrification/automation/protection-control-metering/

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

Manufacturer family/application source. GE Vernova publishes GSU solutions from 5 MVA to 1000 MVA and a 550 kV, 1000 MVA/500 MVA single-phase reference in its official range brochure. Exact order code, guaranteed losses, dimensions, insulation level, cooling stage, winding material and project options must be confirmed with the OEM before procurement or an SLD study.

## Pricing & Logistics

- Pricing type: RFQ (On Request) - Indicative range: $3,600,000 – $4,200,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 60 months
- Compliance candidates: IEC 60076, IEEE C57, JEC. 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-GEV-GSU-1000M-550K","quantity":1}]}
```

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