# Sunten Electric 2500 kVA 35/0.4 kV K-Factor 13 Data Center Dry-Type Transformer

> Sunten Electric 2500 kVA 35/0.4 kV K-Factor 13 Data Center Dry-Type Transformer belongs to the Cast-Resin Dry-Type Transformers category and is rated at 2500 kVA with 35/0.4 kV primary/secondary voltage. Application: High-Harmonic Data Center UPS & Server Rack Distribution. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-SUNTEN-K13-2500-35 | Brand: Sunten Electric | Category: Power & Energy Equipment / Transformers / Distribution Transformers / Cast-Resin Dry-Type Transformers

**Voltformer canonical:** https://voltformer.com/product/sunten-electric-2500-kva-35-0-4-kv-k-factor-13-data-center-dry-type-transformer - markdown version: https://voltformer.com/product/sunten-electric-2500-kva-35-0-4-kv-k-factor-13-data-center-dry-type-transformer.md

## Overview

Sunten Electric 2500 kVA 35/0.4 kV K-Factor 13 Data Center Dry-Type Transformer is intended for High-Harmonic Data Center UPS & Server Rack Distribution. Configured electrical data: 2500 kVA, 35/0.4 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn11 and short-circuit impedance 6%. Construction: Cu-Cu (K-13 shielded); cooling: AN/AF; loss class: Data Center High Harmonic 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:** High-Harmonic Data Center UPS & Server Rack Distribution
- **Target industries:** Data Centers, Telecommunications & Cellular Towers, Financial Districts & Towers
- **Brand:** [Sunten Electric](https://voltformer.com/brand/sunten-electric.md) - Pioneer of cast-resin dry-type transformer technology; specialist in F1 fire-safe SCB18 dry-type, K-Factor 13 hyperscale data center transformers and rail metro DC traction rectifier transformers.
- **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. / [Cast-Resin Dry-Type Transformers](https://voltformer.com/category/distribution-transformers/cast-resin-dry-type-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 2500 kVA |
| Primary / secondary voltage | 35 kV / 0.4 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn11 |
| Short-circuit impedance (Uk) | 6% |
| No-load loss P0 | 2.60 kW |
| Load loss Pk | 17.2 kW |
| Calculated efficiency (power factor = 1) | 99.21% at 100% load; 99.45% at 50% load |
| Loss class | Data Center High Harmonic Grade |
| Windings | Cu-Cu (K-13 shielded) - cooling: AN/AF - insulation: Class H (180°C) |
| Temperature rise | 90 K - sound pressure: 55 dB(A) |
| Mass and dimensions | 6900 kg - 2050×1280×2150 mm |
| Enclosure | IP20 / optional IP31 - 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 60076-11
- TS EN 50708 series
- IEEE C57.110
- ISO 9001

## Accessories

**Included:** PT100 Temperature Sensors, Digital Thermostat, Grounding Shield
**Optional:** IP31 Smart Enclosure, Cooling Fan Kit

## Official sources

- https://en.sunten.com.cn/

- **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: $34,500 – $41,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEC 60076-11, TS EN 50708 series, IEEE C57.110, ISO 9001. 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-SUNTEN-K13-2500-35","quantity":1}]}
```

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