# Haihong 3150 kVA 35/0.8-0.8 kV 3D Dual-Secondary Solar Step-Up Transformer

> Haihong 3150 kVA 35/0.8-0.8 kV 3D Dual-Secondary Solar Step-Up Transformer belongs to the Solar PV Step-Up Transformers category and is rated at 3150 kVA with 35/0.8 kV primary/secondary voltage. Application: Utility-Scale Ground-Mount & Floating Solar PV Projects. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-HAI-SOL-3D-3150-35 | Brand: Haihong Electric (Guangdong Haihong) | Category: Power & Energy Equipment / Transformers / Renewable Energy Transformers (PV, Wind & BESS) / Solar PV Step-Up Transformers

**Voltformer canonical:** https://voltformer.com/product/haihong-3150-kva-35-0-8-0-8-kv-3d-dual-secondary-solar-step-up-transformer - markdown version: https://voltformer.com/product/haihong-3150-kva-35-0-8-0-8-kv-3d-dual-secondary-solar-step-up-transformer.md

## Overview

Haihong 3150 kVA 35/0.8-0.8 kV 3D Dual-Secondary Solar Step-Up Transformer is intended for Utility-Scale Ground-Mount & Floating Solar PV Projects. Configured electrical data: 3150 kVA, 35/0.8 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn11-yn11 and short-circuit impedance 6.5%. Construction: Copper (Cu-Cu); cooling: ONAN; loss class: Ecodesign Tier 2 3D Solar 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:** Utility-Scale Ground-Mount & Floating Solar PV Projects
- **Target industries:** Ground-Mounted Solar PV Plants, Industrial Rooftop Solar PV Projects, Floating Solar PV Plants
- **Brand:** [Haihong Electric (Guangdong Haihong)](https://voltformer.com/brand/haihong-electric.md) - Inventor and global leader of 3D Three-Dimensional Triangular Wound-Core transformer technology; Haihong Electric delivers revolutionary efficiency from 110 kV oil power transformers to naturally-vent
- **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 | 35 kV / 0.8 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn11-yn11 |
| Short-circuit impedance (Uk) | 6.5% |
| No-load loss P0 | 2.15 kW |
| Load loss Pk | 20.5 kW |
| Calculated efficiency (power factor = 1) | 99.29% at 100% load; 99.54% at 50% load |
| Loss class | Ecodesign Tier 2 3D Solar Grade |
| Windings | Copper (Cu-Cu) - cooling: ONAN - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 52 dB(A) |
| Mass and dimensions | 8200 kg - 2550×1750×2300 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 | 3D Triangular Continuous Wound Core (Hi-B Grain-Oriented Steel - Seamless) |
| Bushings / terminals | Direct Copper Busbar Terminals (Busbar Integrated / IP00-IP31) |

## Standards

- IEC 60076-16
- IEC 60076
- TS EN 50708 series

## Accessories

**Included:** 3D Wound Core Magnetic Body, DGPT2 Protection Relay, Pressure Relief Valve
**Optional:** Ester Oil Filling

## Official sources

- https://en.gdhaihong.com/

- **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: $39,500 – $46,000 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-HAI-SOL-3D-3150-35","quantity":1}]}
```

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