# WEG 3150 kVA 34.5/0.8 kV Solar PV Step-Up Transformers

> WEG 3150 kVA 34.5/0.8 kV Solar PV Step-Up Transformers 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: Central Solar Inverter Step-Up Transformer Stations. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-WEG-SOL-3150-345 | Brand: WEG | Category: Power & Energy Equipment / Transformers / Renewable Energy Transformers (PV, Wind & BESS) / Solar PV Step-Up Transformers

**Voltformer canonical:** https://voltformer.com/product/weg-3150-kva-34-5-kv-dual-lv-solar-pv-step-up-transformer - markdown version: https://voltformer.com/product/weg-3150-kva-34-5-kv-dual-lv-solar-pv-step-up-transformer.md

## Overview

WEG 3150 kVA 34.5/0.8 kV Solar PV Step-Up Transformers is intended for Central Solar Inverter Step-Up Transformer Stations. Configured electrical data: 3150 kVA, 34.5/0.8 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dy11y11 and short-circuit impedance 6.5%. Construction: Aluminum (Al-Al); cooling: ONAN; 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:** Central Solar Inverter Step-Up Transformer Stations
- **Target industries:** Utility-Scale Ground-Mounted Solar PV Plants, Centralized Solar Inverter Stations, Hybrid Solar & Storage Power Plants
- **Brand:** [WEG](https://voltformer.com/brand/weg-energy.md) - Global electrical multinational WEG manufactures large power transmission transformers up to 550 kV, renewable PV/wind step-up units, cast resin dry-type transformers, and medium-voltage switchgear.
- **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 - Dy11y11 |
| Short-circuit impedance (Uk) | 6.5% |
| No-load loss P0 | 2.80 kW |
| Load loss Pk | 22.0 kW |
| Calculated efficiency (power factor = 1) | 99.22% at 100% load; 99.48% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Aluminum (Al-Al) - cooling: ONAN - insulation: Class A (105°C) |
| Temperature rise | 65 K - sound pressure: 60 dB(A) |
| Mass and dimensions | 7800 kg - 2550×1680×2350 mm |
| Enclosure | IP55 hermetic - wheel gauge: 1070 mm |
| LI / AC withstand | 170 kV peak / 70 kV rms - partial discharge: 5 pC |
| Environment | -20°C / +50°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Configuration-specific technical value |

## Standards

- IEC 60076-16
- TS EN 50708 series
- EU 548/2014 + 2019/1783 Tier 2

## Accessories

**Included:** DGPT2 Multifunction Protection Relay, Configuration-specific technical value, Configuration-specific technical value
**Optional:** Configuration-specific technical value

## Official sources

- https://www.weg.net/

- **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: $38,000 – $43,500 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076-16, TS EN 50708 series, EU 548/2014 + 2019/1783 Tier 2. 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-WEG-SOL-3150-345","quantity":1}]}
```

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