# GE Vernova 800 MVA 765/345 kV Interconnected Autotransformer

> 800 MVA GE Vernova autotransformer family for 765 kV interconnected transmission systems.

> SKU: VF-GEV-AUT-800M-765K | Brand: GE Vernova (General Electric) | Category: Power & Energy Equipment / Transformers / High-Voltage & Transmission Power Transformers / Interconnection & Transmission Autotransformers (345-380 kV)

**Voltformer canonical:** https://voltformer.com/product/ge-vernova-800-mva-765-345-kv-autotransformer - markdown version: https://voltformer.com/product/ge-vernova-800-mva-765-345-kv-autotransformer.md

## Overview

GE Vernova 800 MVA 765/345 kV Interconnected Autotransformer is intended for TEİAŞ 380 kV National Grid Backbone Main Interconnection Substation. Configured electrical data: 800 MVA, 765/345 kV primary/secondary voltage, 50 Hz, 3-phase, vector group YNa0d11 and short-circuit impedance 12.5%. Construction: Copper (Cu-Cu); cooling: ONAF; loss class: TEİAŞ 380 kV İletim Standardı. 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:** TEİAŞ 380 kV National Grid Backbone Main Interconnection Substation
- **Target industries:** National Transmission Grids, Mega Power Station Switchyards
- **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. / [Interconnection & Transmission Autotransformers (345-380 kV)](https://voltformer.com/category/power-transmission-transformers/interconnected-grid-autotransformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 800 MVA |
| Primary / secondary voltage | 765 kV / 345 kV (OLTC - project configured) |
| Frequency / phases | 50 Hz / 3-phase - YNa0d11 |
| Short-circuit impedance (Uk) | 12.5% |
| No-load loss P0 | 217.60 kW |
| Load loss Pk | 1152.0 kW |
| Calculated efficiency (power factor = 1) | 99.8291% at 100% load; 99.8738% at 50% load |
| Loss class | TEİAŞ 380 kV İletim Standardı |
| Windings | Copper (Cu-Cu) - cooling: ONAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 68 dB(A) |
| Mass and dimensions | 185000 kg - 8500×4800×7500 mm |
| Enclosure | IP55 - wheel gauge: 2000 mm |
| LI / AC withstand | 1913 kV peak / 918 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

- TEİAŞ technical specification
- IEC 60076
- TS EN 60076

## Accessories

**Included:** OLTC, Online DGA interface, Bushing monitoring
**Optional:** Tertiary reactor connection, Digital transformer monitoring, Natural ester fluid

## Official sources

- https://www.gevernova.com/electrification/equipment/transformers/power-transformers
- 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 autotransformer coverage up to 1200 MVA and 765 kV. The 800 MVA, 765/345 kV entry is a transmission-family selection; the exact winding arrangement and guaranteed losses must be quoted. 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 (Project Engineering) - Indicative range: $1,100,000 – $1,350,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 48 months
- Compliance candidates: TEİAŞ technical specification, IEC 60076, TS EN 60076. 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-AUT-800M-765K","quantity":1}]}
```

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