# Hitachi Energy 75 MVA 34.5 kV Submerged Arc Furnace (SAF) Ferroalloy Transformer

> Hitachi Energy 75 MVA 34.5 kV submerged arc furnace (SAF) industrial reduction transformer.

> SKU: VF-ABB-SAF-75M-345 | Brand: ABB / Hitachi Energy | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / Arc & Melting Furnace Transformers (EAF/LF/SAF)

**Voltformer canonical:** https://voltformer.com/product/hitachi-energy-75-mva-34-5-kv-submerged-arc-furnace-transformer - markdown version: https://voltformer.com/product/hitachi-energy-75-mva-34-5-kv-submerged-arc-furnace-transformer.md

## Overview

Hitachi Energy 75 MVA 34.5 kV Submerged Arc Furnace (SAF) Ferroalloy Transformer is intended for Heavy Steel Melting Arc Furnace Power Supply. Configured electrical data: 75 MVA, 34.5/0.28 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyd11 and short-circuit impedance 8.5%. 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:** [ABB / Hitachi Energy](https://voltformer.com/brand/abb-hitachi-energy.md) - Global leader in high-voltage power grids and critical industrial infrastructure; Hitachi Energy delivers Resibloc® glass-fibre reinforced dry-type, TrafoStar™ large power transformers and EcoDry seri
- **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 | 75 MVA |
| Primary / secondary voltage | 34.5 kV / 0.28 kV (200V - 800V (Multi-step motorized tap changer)) |
| Frequency / phases | 50 Hz / 3-phase - Dyd11 |
| Short-circuit impedance (Uk) | 8.5% |
| No-load loss P0 | 42.00 kW |
| Load loss Pk | 290.0 kW |
| Calculated efficiency (power factor = 1) | 99.5593% at 100% load; 99.6956% 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 | 105000 kg - 7400×4300×5200 mm |
| Enclosure | IP54 - wheel gauge: 1435 mm |
| LI / AC withstand | 170 kV peak / 70 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.hitachienergy.com/products-and-solutions/transformers/special-application-transformers/furnace-transformers
- https://www.hitachienergy.com/products-and-solutions/transformers

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

Manufacturer family/application source. Hitachi Energy submerged arc furnace (SAF) smelting transformers provide continuous high-current performance for silicon, ferrosilicon and ferrochrome reduction processes. 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-ABB-SAF-75M-345","quantity":1}]}
```

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