# Tamini 40 MVA 34.5 kV Ladle Furnace (LF) Heavy-Duty Transformer

> Tamini 40 MVA 34.5 kV heavy-duty water-cooled ladle furnace (LF) transformer for secondary steel refining.

> SKU: VF-TAM-LF-40M-345 | Brand: Tamini Transformers | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / Arc & Melting Furnace Transformers (EAF/LF/SAF)

**Voltformer canonical:** https://voltformer.com/product/tamini-40-mva-34-5-kv-ladle-furnace-transformer - markdown version: https://voltformer.com/product/tamini-40-mva-34-5-kv-ladle-furnace-transformer.md

## Overview

Tamini 40 MVA 34.5 kV Ladle Furnace (LF) Heavy-Duty Transformer is intended for Heavy Steel Melting Arc Furnace Power Supply. Configured electrical data: 40 MVA, 34.5/0.65 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Özel Bağlantı and short-circuit impedance 12%. Construction: Copper (Cu-Cu); cooling: OFWF; loss class: Configuration-specific loss class. 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:** Heavy Steel Melting Arc Furnace Power Supply
- **Target industries:** Steel Works & Foundries, Scrap Steel Smelting Rolling Mills, Foundries & Smelters
- **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 | 40 MVA |
| Primary / secondary voltage | 34.5 kV / 0.65 kV (200V - 800V (Multi-step motorized tap changer)) |
| Frequency / phases | 50 Hz / 3-phase - special connection |
| Short-circuit impedance (Uk) | 12% |
| No-load loss P0 | 29.00 kW |
| Load loss Pk | 185.0 kW |
| Calculated efficiency (power factor = 1) | 99.4678% at 100% load; 99.6252% at 50% load |
| Loss class | Configuration-specific loss class |
| Windings | Copper (Cu-Cu) - cooling: OFWF - insulation: Class A / reinforced mechanical support |
| Temperature rise | 65 K - sound pressure: 75 dB(A) |
| Mass and dimensions | 62000 kg - 5500×3800×4300 mm |
| Enclosure | IP54 - wheel gauge: 1435 mm |
| LI / AC withstand | 200 kV peak / 75 kV rms - partial discharge: 10 pC |
| Environment | -25°C / +40°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Plug-in Separable Elbow Terminals (Dead-Front) / Porcelain DIN 42531 |

## Standards

- IEC 60076
- IEC 61378
- ISO 9001

## Accessories

**Included:** Water Heat Exchanger (OFWF), High-Current Water-Cooled Copper Tube Terminals, Buchholz Relay
**Optional:** Online DGA Gas Monitoring, Electrode Regulation Integration

## Official sources

- https://www.tamini.it/

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

Manufacturer family/application source. Tamini ladle furnace (LF) transformers are purpose-built for secondary metallurgy refining, providing robust water-cooled OFWF design capable of handling continuous secondary currents up to 60 kA and severe thermal cycling. 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: $380,000 – $460,000 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, ISO 9001. 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-LF-40M-345","quantity":1}]}
```

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