# Eaton Cooper Envirotemp™ FR3™ 1000 kVA 34.5/0.4 kV Natural Ester-Oil Transformer

> Eaton Cooper Envirotemp™ FR3™ 1000 kVA 34.5/0.4 kV Natural Ester-Oil Transformer belongs to the Oil-Immersed Hermetic Distribution Transformers category and is rated at 1000 kVA with 34.5/0.4 kV primary/secondary voltage. Application: Water Catchments, Forest Facilities & High Fire Risk Areas. Final ratings must be verified against the manufacturer datasheet.

> SKU: VF-EATON-FR3-1000-345 | Brand: Eaton / Cooper Power | Category: Power & Energy Equipment / Transformers / Distribution Transformers / Oil-Immersed Hermetic Distribution Transformers

**Voltformer canonical:** https://voltformer.com/product/eaton-cooper-envirotemp-fr3-1000-kva-34-5-0-4-kv-natural-ester-oil-transformer - markdown version: https://voltformer.com/product/eaton-cooper-envirotemp-fr3-1000-kva-34-5-0-4-kv-natural-ester-oil-transformer.md

## Overview

Eaton Cooper Envirotemp™ FR3™ 1000 kVA 34.5/0.4 kV Natural Ester-Oil Transformer is intended for Water Catchments, Forest Facilities & High Fire Risk Areas. Configured electrical data: 1000 kVA, 34.5/0.4 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn11 and short-circuit impedance 6%. Construction: Copper (Cu-Cu); cooling: KNAN (FR3 Ester Oil); 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:** Water Catchments, Forest Facilities & High Fire Risk Areas
- **Target industries:** Hydroelectric Dams & Watersheds, Forestry & Remote Eco Installations, Food & Pharmaceutical Manufacturing
- **Brand:** [Eaton / Cooper Power](https://voltformer.com/brand/eaton-cooper.md) - The reference for North American and global grids; Eaton Cooper Power is world leader in Envirotemp™ FR3™ natural ester liquid-insulated fire-resistant distribution transformers and Dead-Front pad-mou
- **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 Hermetic Distribution Transformers](https://voltformer.com/category/distribution-transformers/oil-immersed-hermetic-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 1000 kVA |
| Primary / secondary voltage | 34.5 kV / 0.4 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn11 |
| Short-circuit impedance (Uk) | 6% |
| No-load loss P0 | 740 W |
| Load loss Pk | 7.9 kW |
| Calculated efficiency (power factor = 1) | 99.14% at 100% load; 99.46% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Copper (Cu-Cu) - cooling: KNAN (FR3 Ester Oil) - insulation: Class K (natural ester 300°C+) |
| Temperature rise | 65 K - sound pressure: 51 dB(A) |
| Mass and dimensions | 3750 kg - 1680×1120×1780 mm |
| Enclosure | IP55 - wheel gauge: 670 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
- IEEE C57
- TS EN 50708 series
- UL Listed

## Accessories

**Included:** DGPT2 Relay, Envirotemp FR3 Filling
**Optional:** Plug-in Separable Connectors

## Official sources

- https://www.eaton.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: $19,500 – $23,000 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, TS EN 50708 series, UL Listed. 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-EATON-FR3-1000-345","quantity":1}]}
```

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