# TBEA 25 MVA 34.5 kV / 600V DC 24-Darbe Green Hydrogen Electrolyser Rectifier Transformer

> TBEA 25 MVA 34.5 kV / 600V DC 24-Darbe Green Hydrogen Electrolyser Rectifier Transformer belongs to the Rectifier & Electrolysis Transformers category and is rated at 25 MVA with 34.5/0.6 kV primary/secondary voltage. Application: 20 MW Green Hydrogen Electrolyser DC Power Supply. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-TBEA-HYD-25MVA-345 | Brand: TBEA (Tebian Electric Apparatus) | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / Rectifier & Electrolysis Transformers

**Voltformer canonical:** https://voltformer.com/product/tbea-25-mva-34-5-kv-600v-dc-24-pulse-green-hydrogen-electrolyser-rectifier-transformer - markdown version: https://voltformer.com/product/tbea-25-mva-34-5-kv-600v-dc-24-pulse-green-hydrogen-electrolyser-rectifier-transformer.md

## Overview

TBEA 25 MVA 34.5 kV / 600V DC 24-Darbe Green Hydrogen Electrolyser Rectifier Transformer is intended for 20 MW Green Hydrogen Electrolyser DC Power Supply. Configured electrical data: 25 MVA, 34.5/0.6 kV primary/secondary voltage, 50 Hz, 3-phase, vector group configuration-specific vector group and short-circuit impedance 10.5%. Construction: Copper (Cu-Cu); cooling: ONAF/OFAF; 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:** [TBEA (Tebian Electric Apparatus)](https://voltformer.com/brand/tbea-energy.md) - TBEA, one of the world's largest transformer manufacturers, delivers world-leading engineering from 1000 kV UHV AC/DC power transformers to SCB18 cast-resin dry-type, S20/S22 ultra-low-loss hermetic a
- **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 | 25 MVA |
| Primary / secondary voltage | 34.5 kV / 0.6 kV (±4 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Special 24-pulse (D/y/d/y phase-shifted) |
| Short-circuit impedance (Uk) | 10.5% |
| No-load loss P0 | 14.00 kW |
| Load loss Pk | 135.0 kW |
| Calculated efficiency (power factor = 1) | 99.41% at 100% load; 99.62% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Copper (Cu-Cu) - cooling: ONAF/OFAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 66 dB(A) |
| Mass and dimensions | 38000 kg - 4800×2900×4200 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://en.tbea.com/product_list/48.html

- **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: $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-TBEA-HYD-25MVA-345","quantity":1}]}
```

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