# Hitachi Energy TrafoStar 63 MVA 220/11-6.6 kV Power Plant Auxiliary Service Transformer

> Hitachi Energy TrafoStar 63 MVA 220 kV dual secondary heavy-duty station service transformer.

> SKU: VF-ABB-AUX-63M-220 | Brand: ABB / Hitachi Energy | Category: Power & Energy Equipment / Transformers / Distribution Transformers / Oil-Immersed Conservator Transformers

**Voltformer canonical:** https://voltformer.com/product/hitachi-energy-trafostar-63-mva-220-11-6-6-kv-auxiliary-transformer - markdown version: https://voltformer.com/product/hitachi-energy-trafostar-63-mva-220-11-6-6-kv-auxiliary-transformer.md

## Overview

Hitachi Energy TrafoStar 63 MVA 220/11-6.6 kV Power Plant Auxiliary Service Transformer is intended for 154 kV National Grid to 34.5 kV Main Step-Down Power Transformer. Configured electrical data: 63 MVA, 220/11 kV primary/secondary voltage, 50 Hz, 3-phase, vector group YNd11-d11 and short-circuit impedance 13.5%. Construction: Copper (Cu-Cu); cooling: ONAN/ONAF; 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:** 154 kV National Grid to 34.5 kV Main Step-Down Power Transformer
- **Target industries:** National Transmission Grid Network, Major Power Plants (Hydro & Wind), Mega Industrial Zone Grid Infeeds
- **Brand:** [ABB / Hitachi Energy](https://voltformer.com/brand/abb-hitachi-energy.md) - Global leader in high-voltage power grids and critical industrial infrastructure; Hitachi Energy delivers Resibloc® glass-fibre reinforced dry-type, TrafoStar™ large power transformers and EcoDry seri
- **Category:** [Power & Energy Equipment](https://voltformer.com/catalog.md) / **Transformers** / [Distribution Transformers](https://voltformer.com/category/distribution-transformers.md): 50 kVA–3150 kVA oil-immersed hermetic, conservator and cast-resin dry-type medium-voltage distribution transformers. / [Oil-Immersed Conservator Transformers](https://voltformer.com/category/distribution-transformers/oil-immersed-conservator-tank-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 63 MVA |
| Primary / secondary voltage | 220 kV / 11 kV (±8 x 1.25% (OLTC on-load tap-changing)) |
| Frequency / phases | 50 Hz / 3-phase - YNd11-d11 |
| Short-circuit impedance (Uk) | 13.5% |
| No-load loss P0 | 32.00 kW |
| Load loss Pk | 195.0 kW |
| Calculated efficiency (power factor = 1) | 99.641% at 100% load; 99.7443% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Copper (Cu-Cu) - cooling: ONAN/ONAF - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 68 dB(A) |
| Mass and dimensions | 78000 kg - 7100×4200×5300 mm |
| Enclosure | IP55 / switchyard outdoor - wheel gauge: 1435 mm |
| LI / AC withstand | 950 kV peak / 395 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 series
- TEİAŞ technical specification
- TS EN 60076
- KEMA & CESI type-test approved

## Accessories

**Included:** Configuration-specific technical value, Configuration-specific technical value, Configuration-specific technical value
**Optional:** CoreSense online DGA, Bushing izleme

## Official sources

- https://www.hitachienergy.com/products-and-solutions/transformers/power-transformers/station-service-transformers
- https://www.hitachienergy.com/products-and-solutions/transformers

- **Source scope:** manufacturer-family
- **Last reviewed:** 2026-09-13

Manufacturer family/application source. Hitachi Energy TrafoStar station service transformers deliver rugged continuous power to combined-cycle, nuclear and thermal power station internal medium-voltage switchboards. 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 (On Request) - Indicative range: $420,000 – $510,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076 series, TEİAŞ technical specification, TS EN 60076, KEMA & CESI type-test approved. 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-ABB-AUX-63M-220","quantity":1}]}
```

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