# Siemens Energy FITformer® 3150 kVA 34.5/0.8-0.8 kV Ester-Oil Solar Transformer

> Siemens Energy FITformer® 3150 kVA 34.5/0.8-0.8 kV Ester-Oil Solar Transformer belongs to the Solar PV Step-Up Transformers category and is rated at 3150 kVA with 34.5/0.8 kV primary/secondary voltage. Application: Utility PV & Hybrid Energy Parks Eco-Friendly Step-Up. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-SIE-FIT-SOL-3150-35 | Brand: Siemens Energy | Category: Power & Energy Equipment / Transformers / Renewable Energy Transformers (PV, Wind & BESS) / Solar PV Step-Up Transformers

**Voltformer canonical:** https://voltformer.com/product/siemens-energy-fitformer-3150-kva-34-5-0-8-0-8-kv-ester-oil-solar-transformer - markdown version: https://voltformer.com/product/siemens-energy-fitformer-3150-kva-34-5-0-8-0-8-kv-ester-oil-solar-transformer.md

## Overview

Siemens Energy FITformer® 3150 kVA 34.5/0.8-0.8 kV Ester-Oil Solar Transformer is intended for Utility PV & Hybrid Energy Parks Eco-Friendly Step-Up. Configured electrical data: 3150 kVA, 34.5/0.8 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn11-yn11 and short-circuit impedance 7%. Construction: Copper (Cu-Cu); cooling: KNAN (configuration-dependent); loss class: Ecodesign Tier 2 Ester Solar. 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:** Utility PV & Hybrid Energy Parks Eco-Friendly Step-Up
- **Target industries:** Ground-Mounted Solar PV Plants, Industrial Rooftop Solar PV Projects, Floating Solar PV Plants
- **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** / [Renewable Energy Transformers (PV, Wind & BESS)](https://voltformer.com/category/renewable-energy-transformers.md): Multi-winding, harmonic-tolerant step-up transformers for solar (PV), wind and battery storage (BESS) plants. / [Solar PV Step-Up Transformers](https://voltformer.com/category/renewable-energy-transformers/solar-pv-step-up-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 3150 kVA |
| Primary / secondary voltage | 34.5 kV / 0.8 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn11-yn11 |
| Short-circuit impedance (Uk) | 7% |
| No-load loss P0 | 2.30 kW |
| Load loss Pk | 21.0 kW |
| Calculated efficiency (power factor = 1) | 99.27% at 100% load; 99.52% at 50% load |
| Loss class | Ecodesign Tier 2 Ester Solar |
| Windings | Copper (Cu-Cu) - cooling: KNAN (configuration-dependent) - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 58 dB(A) |
| Mass and dimensions | 8100 kg - 2600×1750×2350 mm |
| Enclosure | IP55 - wheel gauge: 1070 mm |
| LI / AC withstand | 170 kV peak / 70 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 60076-16
- IEC 60076
- TS EN 50708 series

## Accessories

**Included:** DGPT2 Hermetic Protection, Pressure Relief
**Optional:** Online DGA Sensor

## Official sources

- https://www.siemensenergy.com/global/en/home/products-services/product-offerings/transformers.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: $42,000 – $48,500 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076-16, IEC 60076, TS EN 50708 series. 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-FIT-SOL-3150-35","quantity":1}]}
```

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