# HD Hyundai Electric 40 MVA 115/13.8 kV Substation Step-Down Power Transformers (110-330 kV)

> HD Hyundai Electric 40 MVA 115/13.8 kV Substation Step-Down Power Transformers (110-330 kV) belongs to the Substation Step-Down Power Transformers (110-330 kV) category and is rated at 40 MVA with 115/13.8 kV primary/secondary voltage. Application: 115 kV Substations with High Fire and Environmental Risk. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-HDE-EST-40MVA-115 | Brand: HD Hyundai Electric | Category: Power & Energy Equipment / Transformers / High-Voltage & Transmission Power Transformers / Substation Step-Down Power Transformers (110-330 kV)

**Voltformer canonical:** https://voltformer.com/product/hd-hyundai-40-mva-115-kv-synthetic-ester-power-transformer - markdown version: https://voltformer.com/product/hd-hyundai-40-mva-115-kv-synthetic-ester-power-transformer.md

## Overview

HD Hyundai Electric 40 MVA 115/13.8 kV Substation Step-Down Power Transformers (110-330 kV) is intended for 115 kV Substations with High Fire and Environmental Risk. Configured electrical data: 40 MVA, 115/13.8 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn1 and short-circuit impedance 10.5%. Construction: Copper (Cu-Cu); cooling: KNAN/KNAF; 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:** 115 kV Substations with High Fire and Environmental Risk
- **Target industries:** Water Catchment Basins & Dam Perimeters, Urban Underground Substations, Green Eco-Industrial Zone Distribution Hubs
- **Brand:** [HD Hyundai Electric](https://voltformer.com/brand/hd-hyundai-electric.md) - HD Hyundai Electric delivers advanced power engineering solutions including 765 kV power transformers, eco-friendly biodegradable ester oil transformers, and gas-insulated switchgear.
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [High-Voltage & Transmission Power Transformers](https://voltformer.com/category/power-transmission-transformers.md): 5 MVA–1000 MVA 110 kV, 154 kV, 380 kV, 500 kV and 1000 kV UHV AC/DC transmission and interconnection power transformers. / [Substation Step-Down Power Transformers (110-330 kV)](https://voltformer.com/category/power-transmission-transformers/substation-step-down-power-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 40 MVA |
| Primary / secondary voltage | 115 kV / 13.8 kV (±8 x 1.25%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn1 |
| Short-circuit impedance (Uk) | 10.5% |
| No-load loss P0 | 20.00 kW |
| Load loss Pk | 130.0 kW |
| Calculated efficiency (power factor = 1) | 99.63% at 100% load; 99.74% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Copper (Cu-Cu) - cooling: KNAN/KNAF - insulation: Class K Ester (300°C) |
| Temperature rise | 65 K - sound pressure: 64 dB(A) |
| Mass and dimensions | 52000 kg - 5800×3400×4600 mm |
| Enclosure | IP55 - wheel gauge: 1500 mm |
| LI / AC withstand | 550 kV peak / 230 kV rms - partial discharge: 50 pC |
| Environment | -25°C / +45°C; altitude ≤ 1000 m |
| Core steel | CRGO Laser-Treated Grain-Oriented Silicon Steel (23ZDMH85 / Baosteel B23R085) |
| Bushings / terminals | Kompozit Silikon RIP Bushing |

## Standards

- IEC 60076
- IEEE C57.147

## Accessories

**Included:** Configuration-specific technical value, Vacuum OLTC, Buchholz Relay, Configuration-specific technical value
**Optional:** Configuration-specific technical value

## Official sources

- https://www.hyundai-electric.com/elect/en/

- **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: $490,000 – $570,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076, IEEE C57.147. 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-HDE-EST-40MVA-115","quantity":1}]}
```

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