# Eaton Cooper Power 3750 kVA 34.5/0.48 kV Dead-Front Loop-Feed Pad-Mounted Transformer

> Eaton Cooper Power 3750 kVA 34.5 kV dead-front loop-feed compartmental pad-mounted transformer.

> SKU: VF-EAT-PAD-LF-3750-345 | Brand: Eaton / Cooper Power | Category: Power & Energy Equipment / Transformers / Compact Substations, Kiosks & Pad-Mounted / Pad-Mounted Outdoor Transformers

**Voltformer canonical:** https://voltformer.com/product/eaton-cooper-3750-kva-34-5-kv-loop-feed-pad-mounted-transformer - markdown version: https://voltformer.com/product/eaton-cooper-3750-kva-34-5-kv-loop-feed-pad-mounted-transformer.md

## Overview

Eaton Cooper Power 3750 kVA 34.5/0.48 kV Dead-Front Loop-Feed Pad-Mounted Transformer is intended for Building-Free Safe Outdoor Ground-Mount Distribution. Configured electrical data: 3750 kVA, 34.5/0.48 kV primary/secondary voltage, 50 Hz, 3-phase, vector group Dyn1 and short-circuit impedance 6.2%. Construction: Aluminum (Al-Al); cooling: KNAN; 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:** Building-Free Safe Outdoor Ground-Mount Distribution
- **Target industries:** University & Research Campuses, Public Parks & Mall Surroundings, Data Centers
- **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** / [Compact Substations, Kiosks & Pad-Mounted](https://voltformer.com/category/compact-substations-and-padmounted.md): Monolithic concrete kiosks, pad-mounted outdoor transformers and mobile emergency substations. / [Pad-Mounted Outdoor Transformers](https://voltformer.com/category/compact-substations-and-padmounted/pad-mounted-outdoor-transformers.md)

## Technical Specifications

| Property | Value |
|---|---|
| Rated power | 3750 kVA |
| Primary / secondary voltage | 34.5 kV / 0.48 kV (±2 x 2.5%) |
| Frequency / phases | 50 Hz / 3-phase - Dyn1 |
| Short-circuit impedance (Uk) | 6.2% |
| No-load loss P0 | 2.80 kW |
| Load loss Pk | 27.5 kW |
| Calculated efficiency (power factor = 1) | 99.1985% at 100% load; 99.4866% at 50% load |
| Loss class | Ecodesign Tier 2 |
| Windings | Aluminum (Al-Al) - cooling: KNAN - insulation: Class A |
| Temperature rise | 65 K - sound pressure: 52 dB(A) |
| Mass and dimensions | 8900 kg - 2500×2200×2100 mm |
| Enclosure | IP55 / NEMA 3R / Vandal-Resistant - wheel gauge: 1070 mm |
| LI / AC withstand | 150 kV peak / 50 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

- IEEE C57.12.26 / C57.12.34
- IEC 60076
- ANSI C57

## Accessories

**Included:** Dead-Front Plug-in MV Bushing Wells, Bay-O-Net Protection Fuses, Padlocked Steel Doors
**Optional:** Two-Pole Load Disconnector, Bio-Ester Oil Filling

## Official sources

- https://www.eaton.com/us/en-us/catalog/transformers/three-phase-pad-mounted-compartmental-type-transformer.html
- https://www.eaton.com/

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

Manufacturer family/application source. Eaton Cooper Power three-phase pad-mounted compartmental transformers with dead-front loop-feed switching, Bay-O-Net fusing, and FR3 fluid for underground utility and commercial distribution. 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: $26,500 – $31,000 USD
- Delivery time: 2–8 weeks (may vary depending on technical configuration, factory capacity and destination) - Warranty: 36 months
- Compliance candidates: IEEE C57.12.26 / C57.12.34, IEC 60076, ANSI C57. 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-EAT-PAD-LF-3750-345","quantity":1}]}
```

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