# Schneider Electric 20 MVA 34.5/0.6 kV Rectifier & Electrolysis Transformers

> Schneider Electric 20 MVA 34.5 kV multi-winding green hydrogen rectifier transformer.

> SKU: VF-SCH-H2-REC-20M-345 | Brand: Schneider Electric | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / Rectifier & Electrolysis Transformers

**Voltformer canonical:** https://voltformer.com/product/schneider-20-mva-34-5-kv-green-hydrogen-rectifier-transformer - markdown version: https://voltformer.com/product/schneider-20-mva-34-5-kv-green-hydrogen-rectifier-transformer.md

## Overview

Schneider Electric 20 MVA 34.5/0.6 kV Rectifier & Electrolysis Transformers is intended for 20 MW Green Hydrogen Electrolyser DC Power Supply. Configured electrical data: 20 MVA, 34.5/0.6 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dy11d0 (12-Pulse) and short-circuit impedance 7.5%. Construction: Copper (Cu-Cu); cooling: ONAN/ONAF; loss class: Ecodesign Tier 2. 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:** 20 MW Green Hydrogen Electrolyser DC Power Supply
- **Target industries:** Green Hydrogen Production Facilities, PEM & Alkaline Electrolysis Plants, Synthetic Fuel (e-Fuel) Plants
- **Brand:** [Schneider Electric](https://voltformer.com/brand/schneider-electric.md) - World leader in energy management and automation; Schneider Electric offers Trihal cast-resin dry-type, Minera oil-immersed distribution and Minera MP renewable energy transformers with maximum safety
- **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. / [Rectifier & Electrolysis Transformers](https://voltformer.com/category/special-industrial-process-transformers/rectifier-electrolysis-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 20 MVA |
| Primary / secondary voltage | 34.5 kV / 0.6 kV (±4 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dy11d0 (12-Pulse) |
| Short-circuit impedance (Uk) | 7.5% |
| No-load loss P0 | 14.00 kW |
| Load loss Pk | 92.0 kW |
| Calculated efficiency (power factor = 1) | 99.4728% at 100% load; 99.6314% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Copper (Cu-Cu) - cooling: ONAN/ONAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 66 dB(A) |
| Mass and dimensions | 38000 kg - 5100×3200×3900 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 61378-1 (rectifier transformers)
- IEC 60076
- CE

## Accessories

**Included:** 24-Pulse Phase Shifting Winding Set, Internal Saturable Reactor, Buchholz Relay
**Optional:** Rectifier Thyristor / Diode Bridge Integrated Cabinet

## Official sources

- https://www.se.com/ww/en/product-category/1200-power-transformers/
- https://www.se.com/ww/en/

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

Manufacturer family/application source. Schneider Electric multi-winding rectifier transformers supplying low-voltage, high-DC-current stacks for commercial hydrogen generation electrolyzers. 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: $295,000 – $350,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 61378-1 (rectifier transformers), IEC 60076, CE. 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-SCH-H2-REC-20M-345","quantity":1}]}
```

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