# Siemens Energy SVC PLUS 300 MVAr / 400 kV Coupling Transformer

> High-voltage FACTS coupling transformer envelope for Siemens Energy SVC PLUS installations.

> SKU: VF-SIE-SVC-300M-400 | Brand: Siemens Energy | Category: Power & Energy Equipment / Transformers / Special Industrial & Process Transformers / STATCOM, SVG & Power-Quality Coupling Transformers

**Voltformer canonical:** https://voltformer.com/product/siemens-energy-svc-plus-300-mvar-400-kv-coupling-transformer - markdown version: https://voltformer.com/product/siemens-energy-svc-plus-300-mvar-400-kv-coupling-transformer.md

## Overview

Siemens Energy SVC PLUS 300 MVAr / 400 kV Coupling Transformer is intended for Wind & Solar Grid-Code Compliant STATCOM Reactive Power Compensation. Configured electrical data: 300 MVA, 400/20 kV primary/secondary voltage, 50 Hz, 3-phase, vector group YNd11 and short-circuit impedance 12%. Construction: Copper (Cu-Cu); cooling: ONAF; loss class: STATCOM / SVG High dv/dt 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:** Wind & Solar Grid-Code Compliant STATCOM Reactive Power Compensation
- **Target industries:** Utility-Scale Solar & Wind Farms, Grid Reactive Power Compensation Substations, Steel Mills & Metallurgical Works
- **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** / [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. / [STATCOM, SVG & Power-Quality Coupling Transformers](https://voltformer.com/category/special-industrial-process-transformers/statcom-svg-power-quality-coupling-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 300 MVA |
| Primary / secondary voltage | 400 kV / 20 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - YNd11 |
| Short-circuit impedance (Uk) | 12% |
| No-load loss P0 | 180.00 kW |
| Load loss Pk | 1414.3 kW |
| Calculated efficiency (power factor = 1) | 99.4714% at 100% load; 99.6455% at 50% load |
| Loss class | STATCOM / SVG High dv/dt Grade |
| Windings | Copper (Cu-Cu) - cooling: ONAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 62 dB(A) |
| Mass and dimensions | 52000 kg - 5200×3300×4600 mm |
| Enclosure | IP55 - wheel gauge: 1600 mm |
| LI / AC withstand | 1000 kV peak / 480 kV rms - partial discharge: 5 pC |
| Environment | -25°C / +40°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Direct Copper Busbar Terminals (Busbar Integrated / IP00-IP31) |

## Standards

- IEC 60076
- IEC 61378-1
- IEEE C57.18.10

## Accessories

**Included:** SVC PLUS interface, Online monitoring interface
**Optional:** DC compensation system, Harmonic filter connection, Bushing monitoring

## Official sources

- https://assets.siemens-energy.com/dam/c15e57e5-d6fe-40ab-9555-b04e01727e0c/GridStabilityBrochureApril2023-pdf_Original%20file.pdf
- 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. The Siemens Energy grid-stability brochure lists a 400 kV, ±300 MVAr SVC PLUS project with a power transformer and DC compensation system. The transformer nameplate and MV bus voltage must be confirmed for the selected project. 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: $360,000 – $430,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076, IEC 61378-1, IEEE C57.18.10. 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-SVC-300M-400","quantity":1}]}
```

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