# Tamini Trasformatori (Terna Group) 80 MVA 34.5/0.8 kV Arc & Melting Furnace Transformers (EAF/LF/SAF)

> Tamini Trasformatori (Terna Group) 80 MVA 34.5/0.8 kV Arc & Melting Furnace Transformers (EAF/LF/SAF) belongs to the Arc & Melting Furnace Transformers (EAF/LF/SAF) category and is rated at 80 MVA with 34.5/0.8 kV primary/secondary voltage. Application: Steelmaking EAF and Ladle Furnaces (LF). Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-TAM-EAF-80MVA-345 | Brand: Tamini Trasformatori (Terna Group) | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / Arc & Melting Furnace Transformers (EAF/LF/SAF)

**Voltformer canonical:** https://voltformer.com/product/tamini-80-mva-34-5-kv-eaf-transformer - markdown version: https://voltformer.com/product/tamini-80-mva-34-5-kv-eaf-transformer.md

## Overview

Tamini Trasformatori (Terna Group) 80 MVA 34.5/0.8 kV Arc & Melting Furnace Transformers (EAF/LF/SAF) is intended for Steelmaking EAF and Ladle Furnaces (LF). Configured electrical data: 80 MVA, 34.5/0.8 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn11 and short-circuit impedance 18%. Construction: Copper (Cu-Cu); cooling: OFWF; loss class: IEC 61378 Endüstriyel Sınıf. 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:** Steelmaking EAF and Ladle Furnaces (LF)
- **Target industries:** Steel Mills & Rolling Mills, Heavy Metallurgical Plants, Electro-Intensive Industries
- **Brand:** [Tamini Trasformatori (Terna Group)](https://voltformer.com/brand/tamini-trasformatori.md) - Part of Terna Group, Tamini is the world leader in custom industrial transformers, electric arc furnace (EAF/LF) transformers, electrolysis rectifier units, and transmission autotransformers.
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [Special Industrial & Process Transformers](https://voltformer.com/category/special-industrial-process-transformers.md): Arc furnace (EAF), green hydrogen electrolyser, rectifier, traction and mining Ex-proof transformers. / [Arc & Melting Furnace Transformers (EAF/LF/SAF)](https://voltformer.com/category/special-industrial-process-transformers/electric-arc-furnace-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 80 MVA |
| Primary / secondary voltage | 34.5 kV / 0.8 kV (400 V - 800 V tap-changing) |
| Frequency / phases | 50 Hz / 3-phase - Dyn11 |
| Short-circuit impedance (Uk) | 18% |
| No-load loss P0 | 50.00 kW |
| Load loss Pk | 390.0 kW |
| Calculated efficiency (power factor = 1) | 99.45% at 100% load; 99.63% at 50% load |
| Loss class | IEC 61378 Endüstriyel Sınıf |
| Windings | Copper (Cu-Cu) - cooling: OFWF - insulation: Class A (105°C) |
| Temperature rise | 65 K - sound pressure: 75 dB(A) |
| Mass and dimensions | 95000 kg - 6200×4500×4900 mm |
| Enclosure | heavy-duty industrial IP55 - wheel gauge: 1500 mm |
| LI / AC withstand | 170 kV peak / 70 kV rms - partial discharge: 50 pC |
| Environment | -20°C / +45°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Configuration-specific technical value |

## Standards

- IEC 60076
- IEC 61378
- IEEE C57.17

## Accessories

**Included:** Configuration-specific technical value, Configuration-specific technical value, Configuration-specific technical value
**Optional:** Internal Series Reactor, Configuration-specific technical value

## Official sources

- https://www.tamini.it/

- **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 (On Request) - Indicative range: $980,000 – $1,150,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076, IEC 61378, IEEE C57.17. 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-TAM-EAF-80MVA-345","quantity":1}]}
```

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