# GE Vernova 500 MVA 765/345 kV Interconnected Autotransformer

> GE Vernova high-voltage autotransformer family for interconnected transmission systems.

> SKU: VF-GEV-AUT-500M-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-500-mva-765-345-kv-autotransformer - markdown version: https://voltformer.com/product/ge-vernova-500-mva-765-345-kv-autotransformer.md

## Overview

GE Vernova 500 MVA 765/345 kV Interconnected Autotransformer is intended for TEİAŞ 380 kV National Grid Backbone Main Interconnection Substation. Configured electrical data: 500 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 | 500 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 | 136.00 kW |
| Load loss Pk | 720.0 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:** Reinhausen Vacuum OLTC, Online DGA 9-Gas Analyzer, Buchholz Relay
**Optional:** Fiber Optic Direct Winding Temperature Sensor

## 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 autotransformers up to 1200 MVA and voltages up to 765 kV. The 500 MVA, 765/345 kV entry is a selectable engineering-family envelope, not a guaranteed order code. 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-500M-765K","quantity":1}]}
```

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