{"id":3655,"date":"2026-04-07T16:41:56","date_gmt":"2026-04-07T19:41:56","guid":{"rendered":"https:\/\/transformadoresuniao.com.br\/?p=3655"},"modified":"2026-04-07T16:41:56","modified_gmt":"2026-04-07T19:41:56","slug":"data-center-transformer-why-dry-type-transformers-are-the-safest-choice-for-critical-infrastructure-2","status":"publish","type":"post","link":"https:\/\/transformadoresuniao.com.br\/en\/transformador-para-data-center-por-que-transformadores-a-seco-sao-a-escolha-mais-segura-para-infraestrutura-critica-2\/","title":{"rendered":"Data Center Transformers: Why Dry-Type Transformers Are the Safest Choice for Critical Infrastructure"},"content":{"rendered":"

Discover how to specify transformers for data centers: 480 V, K-factor,
harmonics and why the dry transformer is the best choice for
critical environments.

Introduction: Why the Topic Gained Relevance
<\/strong>The accelerated growth of data centers in Brazil and around the world has transformed
deeply the electrical specification criteria.
Unlike traditional industrial environments, where loads are predominant
linear (motors, resistive heating), data centers concentrate UPS,
Rectifiers, switching power supplies, high-density racks, and electronic systems
sensitive.

This scenario completely changes the behavior of the electric charge.
As a consequence, two requirements have become recurring in projects:
\u2013 480 V output
transformer with high K-factor

This is not a trend, it's a direct technical requirement of the data architecture.
Modern centers.<\/p>\n\n\n\n

Why 480 V Is the Standard in Data Centers
<\/strong>The decision to use 480 V for low voltage follows a basic engineering principle
Electrical:
For the same power, higher voltage means lower current.
Direct impacts of this choice:
\u2013 reduction of electrical losses (I\u00b2R)
\u2013 less heat buildup in cables and connections
\u2013 optimization of the conductor cross-sectional area
\u2013 improved overall system efficiency

In addition, most large UPS systems naturally operate at
480 V, eliminating intermediate transformation steps.
Practical Comparison<\/p>\n\n\n\n

Rating: 380\/400 V, 480 V
<\/strong>Current for the same power: Higher Lower
Electrical losses Higher Lower
Optimized Larger Cable Gauge
Integration with UPS Limitada Natural
Technical conclusion: 480 V is more efficient, more compatible, and more suitable
for high load density.<\/p>\n\n\n\n

The Real Challenge: Harmonics in Data Centers
The most critical point is not the voltage \u2013 it's the load profile.<\/p>\n\n\n\n


Data centers are dominated by nonlinear loads, such as:
<\/strong>\uf0b7 switching power supplies (servers)
\uf0b7 UPS (rectifier\/inverter)
\uf0b7 electronic converters

These loads do not consume sinusoidal current, causing distortions known as
harmonics.

Main harmonics present:
<\/strong>\uf0b7 Tuesday
\uf0b7 Thursday
\uf0b7 7th
\uf0b7 9th
\uf0b7 11th grade and above<\/p>\n\n\n\n

K-factor: the critical indicator for transformers
<\/strong>The K factor measures the thermal impact of harmonics on the transformer.
The higher the K factor, the greater the transformer's ability to withstand
distorted currents without overheating.<\/p>\n\n\n\n

Application of the K Factor: Interpretation
Linear load K1: No significant harmonics
Mild TI K4\u2013K9 Moderate distortion
K13 Standard Data Center: High Harmonic Content
High Density \/ IA K20+ Severe Condition<\/p>\n\n\n\n

Key point: A conventional transformer can apparently operate
within the power rating, but fail thermally in an environment with harmonics.<\/em><\/p>\n\n\n\n

Where harmonics affect the transformer
<\/strong>Harmonics alter the distribution of internal losses:
\u2013 increased eddy currents
\u2013 skin effect
\u2013 proximity effect
\u2013 localized heating in windings

Pay special attention to the triple harmonics (3rd, 9th, 15th):<\/strong>
\u2013 they do not cancel each other out between phases
\u2013 they add up to zero
\u2013 can cause significant overcurrent
Result: high risk of overheating and failure.<\/p>\n\n\n\n

What Changes in the Design of a Data Center Transformer
<\/strong>A data center transformer is not a standard transformer.
It requires specialized engineering:
\u2013 thermal sizing for nonlinear loads
\u2013 reduction of further losses
\u2013 neutral current control
\u2013 durability for continuous operation (24\/7)
\u2013 compatibility with MT \/ 480 V architecture

Why is a dry-type transformer the best choice?
<\/strong>For critical applications such as data centers, the dry-type transformer offers
clear advantages:
\u2013 greater safety (no flammable oil)
\u2013 ideal for indoor installation
\u2013 lower environmental risk
\u2013 high operational reliability
\u2013 better performance in critical applications<\/p>\n\n\n\n

Uni\u00e3o Transformers: A Solution Tailored to the Modern Data Center
When the market requires medium voltage, a 480 V output, a high K-factor, and
For continuous operation, he is requesting engineering equipment
practical and highly reliable.

Transformadores Uni\u00e3o is built on three pillars:<\/strong><\/p>\n\n\n\n

    \n
  1. Application-Oriented Engineering
    Design based on the actual load profile\u2014not just the nameplate.<\/li>\n\n\n\n
  2. Focus on dry-type transformers
    Secure, robust solutions that are ideal for critical environments.<\/li>\n\n\n\n
  3. High level of customization
    \u2013 K factor (K13, K20, etc.)
    \u2013 specific voltages
    \u2013 thermal requirements
    \u2013 integration with UPS and client architecture<\/li>\n<\/ol>\n\n\n\n

    Frequently Asked Questions<\/strong>:

    What is the best transformer for a data center?
    <\/strong>The most suitable is the medium-voltage dry-type transformer, with a 480V output
    And K is high.

    Why do data centers use 480 V?
    <\/strong>Because it reduces current, electrical losses, and cable sizing, as well as
    to be compatible with UPS.

    Why is the K-factor important?
    <\/strong>Non-linear loads generate harmonics that increase heating
    to transformer.

    Can a standard transformer be used?
    <\/strong>It is not recommended, as overheating and reduced lifespan may occur.
    useful.

    Are dry-type transformers suitable for data centers?
    <\/strong>Yes. It is the safest and most suitable solution for critical and indoor environments.<\/p>\n\n\n\n

    Conclusion
    <\/strong>Properly specifying a data center transformer requires considering the following:
    \u2013 voltage level (480 V)
    \u2013 harmonic content (K factor)
    \u2013 actual operating profile
    Ignoring these factors can lead to premature failures, a reduced service life, and
    operating losses.

    The dry-type medium-voltage transformer, properly designed for
    Harmonics is the most suitable solution for modern data centers.

    Transformadores Uni\u00e3o positions itself as a technical partner for applications
    critical applications that require safety, reliability, and high-level engineering.<\/p>\n\n\n\n

    <\/p>\n\n\n\n


    <\/strong><\/p>","protected":false},"excerpt":{"rendered":"

    Descubra como especificar transformadores para data centers: 480 V, fator K,harm\u00f4nicas e por que o transformador a seco \u00e9 a melhor escolha paraambientes cr\u00edticos. Introdu\u00e7\u00e3o: por que o tema ganhou relev\u00e2nciaO crescimento acelerado dos data centers no Brasil e no mundo transformouprofundamente os crit\u00e9rios de especifica\u00e7\u00e3o el\u00e9trica.Diferente de ambientes industriais tradicionais, onde predominam cargaslineares (motores, […]<\/p>\n","protected":false},"author":1,"featured_media":3656,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-3655","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-transformadores"],"_links":{"self":[{"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/posts\/3655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/comments?post=3655"}],"version-history":[{"count":1,"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/posts\/3655\/revisions"}],"predecessor-version":[{"id":3657,"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/posts\/3655\/revisions\/3657"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/media\/3656"}],"wp:attachment":[{"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/media?parent=3655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/categories?post=3655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/transformadoresuniao.com.br\/en\/wp-json\/wp\/v2\/tags?post=3655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}