# Siemens Energy 500 MVA 500/155 kV UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV)

> Siemens Energy 500 MVA ±500 kV single-phase HVDC converter transformer for bulk power transmission.

> SKU: VF-SIE-HVDC-500M-500 | Brand: Siemens Energy | Category: Power & Energy Equipment / Transformers / High-Voltage & Transmission Power Transformers / UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV)

**Voltformer canonical:** https://voltformer.com/product/siemens-energy-500-mva-500-kv-hvdc-classic-converter-transformer - markdown version: https://voltformer.com/product/siemens-energy-500-mva-500-kv-hvdc-classic-converter-transformer.md

## Overview

Siemens Energy 500 MVA 500/155 kV UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV) is intended for Changji-Guquan 12,000 MW ±1100 kV UHVDC Converter Station. Configured electrical data: 500 MVA, 500/155 kV primary/secondary voltage, 50 Hz, 1-phase, vector group 1-phase converter and short-circuit impedance 16.5%. Construction: Copper (Cu-Cu); cooling: OFAF; loss class: World Record UHVDC Converter Grade. 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:** Changji-Guquan 12,000 MW ±1100 kV UHVDC Converter Station
- **Target industries:** Long-Distance HVDC Transmission Lines, Offshore HVDC Converter Platforms
- **Brand:** [Siemens Energy](https://voltformer.com/brand/siemens-energy.md) - The embodiment of German engineering excellence; Siemens Energy sets the industry standard with GEAFOL® cast-resin dry-type transformers, ester-oil network units and transmission-level autotransformer
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [High-Voltage & Transmission Power Transformers](https://voltformer.com/category/power-transmission-transformers.md): 5 MVA–1000 MVA 110 kV, 154 kV, 380 kV, 500 kV and 1000 kV UHV AC/DC transmission and interconnection power transformers. / [UHV & EHV Ultra-High-Voltage & HVDC Converter (750-1100 kV)](https://voltformer.com/category/power-transmission-transformers/uhv-ultra-high-voltage-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 500 MVA |
| Primary / secondary voltage | 500 kV / 155 kV (±16 x 1.25% OLTC) |
| Frequency / phases | 50 Hz / 1-phase - 1-phase converter |
| Short-circuit impedance (Uk) | 16.5% |
| No-load loss P0 | 140.00 kW |
| Load loss Pk | 920.0 kW |
| Calculated efficiency (power factor = 1) | 99.7884% at 100% load; 99.8522% at 50% load |
| Loss class | World Record UHVDC Converter Grade |
| Windings | Copper (Cu-Cu) - cooling: OFAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 73 dB(A) |
| Mass and dimensions | 360000 kg - 11500×6200×8400 mm |
| Enclosure | IP55 - wheel gauge: 3000 mm |
| LI / AC withstand | 1550 kV peak / 680 kV rms - partial discharge: 20 pC |
| Environment | -25°C / +40°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | RIP (Resin Impregnated Paper) Dry Condenser High-Voltage Bushing |

## Standards

- IEC 61378-2
- GB/T 18494.2
- IEEE C57.129
- CESI

## Accessories

**Included:** DC Polarity Reversal Protection System, Fiber Optic Temperature, Multi-Gas DGA
**Optional:** Fire Protection Water Mist System

## Official sources

- https://www.siemens-energy.com/global/en/offerings/power-transmission/transformers/hvdc-transformers.html
- https://www.siemensenergy.com/global/en/home/products-services/product-offerings/transformers.html

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

Manufacturer family/application source. Siemens Energy HVDC converter transformers for line-commutated converter (LCC) stations engineered to withstand combined AC/DC dielectric stresses, high DC bias magnetization and harmonic currents. 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 (Project Engineering) - Indicative range: $3,200,000 – $3,900,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 60 months
- Compliance candidates: IEC 61378-2, GB/T 18494.2, IEEE C57.129, CESI. 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-SIE-HVDC-500M-500","quantity":1}]}
```

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