# Siemens Energy Mobile Substation 50 MVA 245/33 kV

> Siemens Energy high-voltage mobile substation family for temporary transmission and subtransmission service.

> SKU: VF-SIE-MOB-50M-245K | Brand: Siemens Energy | Category: Power & Energy Equipment / Transformers / Compact Substations, Kiosks & Pad-Mounted / Mobile Emergency Substations

**Voltformer canonical:** https://voltformer.com/product/siemens-energy-mobile-substation-50-mva-245-kv - markdown version: https://voltformer.com/product/siemens-energy-mobile-substation-50-mva-245-kv.md

## Overview

Siemens Energy Mobile Substation 50 MVA 245/33 kV is intended for Natural Disasters, Transformer Outages & Temporary Site Power. Configured electrical data: 50 MVA, 245/33 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn1yn1 and short-circuit impedance 11%. Construction: Copper (Cu-Cu); cooling: ONAN/ONAF; loss class: Mobile Substation High Duty Standard. 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:** Natural Disasters, Transformer Outages & Temporary Site Power
- **Target industries:** Disaster & Emergency Management, Mining Fields & Operations, Temporary Construction Sites
- **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** / [Compact Substations, Kiosks & Pad-Mounted](https://voltformer.com/category/compact-substations-and-padmounted.md): Monolithic concrete kiosks, pad-mounted outdoor transformers and mobile emergency substations. / [Mobile Emergency Substations](https://voltformer.com/category/compact-substations-and-padmounted/mobile-emergency-substations.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 50 MVA |
| Primary / secondary voltage | 245 kV / 33 kV (DETC/OLTC - grid configured) |
| Frequency / phases | 50 Hz / 3-phase - Dyn1yn1 |
| Short-circuit impedance (Uk) | 11% |
| No-load loss P0 | 26.25 kW |
| Load loss Pk | 181.3 kW |
| Calculated efficiency (power factor = 1) | 99.5867% at 100% load; 99.7146% at 50% load |
| Loss class | Mobile Substation High Duty Standard |
| Windings | Copper (Cu-Cu) - cooling: ONAN/ONAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 65 dB(A) |
| Mass and dimensions | 78000 kg - 14500×2800×4200 mm |
| Enclosure | IP55 / road transport compatible - wheel gauge: 2400 mm |
| LI / AC withstand | 613 kV peak / 294 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 | Dead-Front 600A / 200A Load Break Switch Bushing |

## Standards

- IEC 60076
- IEC 62271-200
- IEEE C57.12.00

## Accessories

**Included:** 245 kV switchgear interface, Protection and control systems, Auxiliary winding
**Optional:** E-house shelter, Ester-filled transformer, Transport monitoring

## Official sources

- https://assets.siemens-energy.com/dam/01d1bc9b-bd06-471b-9f86-b39c00c3f3da/Mobile-substatation-pdf_Original%20file.pdf
- https://www.siemens-energy.com/us/en/home/products-services/product/prefabricated-power-solutions.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 publishes mobile-substation packages with high-voltage switchgear and transformer modules, including the 30 MVA 230 kV reference. The 50 MVA, 245/33 kV variant is a project-configured family envelope. 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: $780,000 – $940,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076, IEC 62271-200, IEEE C57.12.00. 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-MOB-50M-245K","quantity":1}]}
```

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