---
title: "75 kVA pad-mounted transformer: amps, specs & lead time | Entogo"
description: "75 kVA three-phase pad-mounted distribution transformer: 90.2 A at 480 V, 208 A at 208 V, 3.5 A at 12.47 kV; 15 / 25 / 35 kV class, DOE 10 CFR 431, IEEE…"
url: https://entogo.ca/products/pad-mounted-transformer/75-kva/
lang: en
type: website
image: https://entogo.ca/_astro/Entogo-10kV-Three-Phase-Oil-Immersed-Distribution-Transformer.MmNE1ATv.png
site: https://entogo.ca/
llms: https://entogo.ca/llms.txt
---

Home › Products › Transformers & Substations › Pad-mounted transformer sizes › 75 kVA

Transformers & Substations

# 75 kVA three-phase pad-mounted transformer

90.2 A at 480 V · 208 A at 208 V · 15 / 25 / 35 kV class

Overview

A 75 kVA three-phase pad-mounted transformer is a liquid-filled, dead-front distribution transformer for ground-level medium-voltage service: a 12.47 / 13.2 / 13.8 kV (15 kV class), 24.94 kV (25 kV class) or 34.5 kV (35 kV class) primary stepping down to 208Y/120, 480Y/277 or 600Y/347 V at 60 Hz. At full load it delivers 90.2 A at 480 V, 208 A at 208 V or 72.2 A at 600 V, and draws 3.5 A from a 12.47 kV feeder. Entogo designs and builds the 75 kVA unit to IEEE C57.12.34 / C57.12.28 and DOE 10 CFR 431 in its own factory, ships engineered-to-order units in 16–24 weeks, and offers UL (cULus) / CSA certification on request.

## Full-load and primary current

Three-phase line current at rated load: amperes = kVA × 1000 ÷ (√3 × V).

Full-load current of a 75 kVA three-phase transformer by voltage
| Winding / voltage | Full-load current |
| --- | --- |
| Secondary 208Y/120 V | 208 A |
| Secondary 480Y/277 V | 90.2 A |
| Secondary 600Y/347 V | 72.2 A |
| Primary 12.47 kV (15 kV class, 95 kV BIL) | 3.5 A |
| Primary 13.2 kV (15 kV class, 95 kV BIL) | 3.3 A |
| Primary 13.8 kV (15 kV class, 95 kV BIL) | 3.1 A |
| Primary 24.94 kV (25 kV class, 125 kV BIL) | 1.7 A |
| Primary 34.5 kV (35 kV class, 150 kV BIL) | 1.3 A |

## Available secondary fault current

Three-phase bolted fault at the secondary terminals with an infinite primary source: full-load amps ÷ (%Z ÷ 100). Impedance is a specifier's choice; 5.75 % is common for larger pad-mounted units, lower values below about 500 kVA. Real values are lower once the utility source impedance is included.

Available fault current of a 75 kVA transformer by impedance and secondary voltage
| Impedance | 208Y/120 V | 480Y/277 V | 600Y/347 V |
| --- | --- | --- | --- |
| 4.00 % | 5.2 kA | 2.3 kA | 1.8 kA |
| 5.00 % | 4.2 kA | 1.8 kA | 1.4 kA |
| 5.75 % | 3.6 kA | 1.6 kA | 1.3 kA |

## What a 75 kVA unit typically serves

- Small commercial buildings and retail pads
- Underground residential subdivisions (URD loops)
- Workplace and multifamily Level 2 EV-charging hubs
- Telecom, water and utility auxiliary sites

Typical, not prescriptive: size from the calculated load and growth margin — see [how to size a transformer (kVA selection)](https://entogo.ca/insights/how-to-size-a-transformer-kva-selection), and for EV-charging sites the [service-capacity calculator](https://entogo.ca/tools/ev-charging-service-capacity-calculator).

Custom-engineered · built to order

[Get a quote](https://entogo.ca/products/transformer-quote?from=75%20kVA%20Three-Phase%20Pad-Mounted%20Distribution%20Transformer)

Lead time

16–24 weeks

Order now for estimated delivery Jan 2027 – Mar 2027.

Certification / testing may extend this per the standard and scope.

## Ratings at a glance

75 kVA pad-mounted transformer ratings
| Specification | Value |
| --- | --- |
| Rated capacity | 75 kVA (three-phase, 60 Hz) |
| Primary (HV) voltage | 12.47 / 13.2 / 13.8 kV (15 kV class) · 24.94 kV (25 kV class) · 34.5 kV (35 kV class) |
| BIL (HV) | 95 kV (15 kV class) · 125 kV (25 kV class) · 150 kV (35 kV class) |
| Secondary (LV) voltage | 208Y/120, 480Y/277, 240/120 or 600 V |
| Full-load current | 90.2 A at 480 V · 208 A at 208 V · 72.2 A at 600 V |
| Cooling / temperature rise | ONAN · 65 °C average winding rise |
| Feed | Dead-front loop-feed (6 bushings) or radial-feed (3 bushings); live-front optional |
| Tap changer | De-energized ±2 × 2.5 % standard |
| Insulating liquid | Mineral oil (FR3 natural ester optional) |
| Windings | Copper or aluminum |
| Enclosure | Tamper-resistant NEMA 3R, ANSI 70 green powder coat |
| Standards | IEEE C57.12.00 / C57.12.34 / C57.12.28 / C57.12.90 · DOE 10 CFR 431 · CSA C88 |
| Certification | UL (cULus) / CSA available on request |
| Lead time | 16–24 weeks (engineered to order); 36 weeks guaranteed worst case with new certification |
| Warranty | Minimum 36 months; extended terms on major power equipment per contract |

Family page: [Three-Phase Pad-Mounted Distribution Transformer](https://entogo.ca/products/three-phase-pad-mounted-transformer) · Glossary: [kVA rating](https://entogo.ca/glossary#kva-rating), [BIL](https://entogo.ca/glossary#bil), [percent impedance](https://entogo.ca/glossary#percent-impedance), [DOE 10 CFR 431](https://entogo.ca/glossary#doe-10-cfr-431), [loop-feed vs. radial-feed](https://entogo.ca/glossary#loop-feed-radial-feed).

## Other ratings

- [112.5 kVA](https://entogo.ca/products/pad-mounted-transformer/112-5-kva/)
- [150 kVA](https://entogo.ca/products/pad-mounted-transformer/150-kva/)
- [225 kVA](https://entogo.ca/products/pad-mounted-transformer/225-kva/)
- [300 kVA](https://entogo.ca/products/pad-mounted-transformer/300-kva/)
- [500 kVA](https://entogo.ca/products/pad-mounted-transformer/500-kva/)
- [750 kVA](https://entogo.ca/products/pad-mounted-transformer/750-kva/)
- [1000 kVA](https://entogo.ca/products/pad-mounted-transformer/1000-kva/)
- [1500 kVA](https://entogo.ca/products/pad-mounted-transformer/1500-kva/)
- [2000 kVA](https://entogo.ca/products/pad-mounted-transformer/2000-kva/)
- [2500 kVA](https://entogo.ca/products/pad-mounted-transformer/2500-kva/)
- [All sizes](https://entogo.ca/products/pad-mounted-transformer/)

FAQ

## Common questions

- **How many amps is a 75 kVA transformer at 480 V?**: A 75 kVA three-phase transformer delivers 90.2 A at 480 V full load (kVA × 1000 ÷ (√3 × 480)). At 208 V the same unit delivers 208 A and at 600 V 72.2 A.
- **What is the primary current of a 75 kVA pad-mounted transformer?**: On a 12.47 kV feeder a 75 kVA unit draws 3.5 A at full load; on 13.8 kV 3.1 A, on 24.94 kV 1.7 A and on 34.5 kV 1.3 A.
- **How much fault current can a 75 kVA transformer deliver?**: With an infinite primary source, a 75 kVA unit at 480 V and 5.75 % impedance can deliver about 1.6 kA of three-phase bolted-fault current (full-load amps ÷ 0.0575). The real value is lower once the utility's source impedance is included; the switchgear downstream must be rated for the study value, not this ceiling.
- **How long does a 75 kVA pad-mounted transformer take to deliver from Entogo?**: 75 kVA pad-mounted units are engineered to order and ship from Entogo's own factory in 16–24 weeks. If the order needs new UL (cULus) or CSA certification, delivery is guaranteed within 36 weeks — against the one-to-four-year lead times common in the North-American merchant market.

Configure & quote

## Specify your 75 kVA pad-mounted transformer and get a quote.

[Configure & get a quote](https://entogo.ca/products/transformer-quote?from=75%20kVA%20Three-Phase%20Pad-Mounted%20Distribution%20Transformer)

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