This document applies to medium power transformers from 25 kVA up to 3 150 kVA with highest
voltage for equipment up to 36 kV, or in low voltage (LV) networks with highest voltage for
equipment of up to 1,1 kV equipped with voltage regulating devices.
Voltage regulating distribution transformers are transformers equipped with components to
control primary or secondary voltage for on-load voltage regulation purposes.
The main objective of the installation of a VRDT is to regulate the LV netw...
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    • Standard
      15 pages
      English language
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This part of IEC 60076-22 applies to a selection of accessories and fittings mounted on liquid
immersed power transformers according to IEC 60076-1 and reactors according to IEC 600766
with or without conservator for indoor or outdoor installation. It outlines the service conditions
and the mechanical requirements that are common to all the accessories and fittings.
This document also outlines the operation requirements specific to each device as well as the
preferred dimensions relevant fo...
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The scope of this document is to define the energy performance of Medium Power Transformers in compliance with prEN 50708-1-1:2019.

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      14 pages
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The scope of this document is to define performance requirements of Large Power Transformers in compliance with prEN 50708 1 1:2019.
NOTE    This document covers the transformers under the EU Regulation N. 548/2014 and Amendment of 2019, gives additional specific guidance for single phase transformers, autotransformers, multi winding transformers and for transformers with OD and OF cooling systems, necessary for the correct application of energy efficiency requirements to these categories of tran...
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This document is part of the of the EN 50708 series which applies to transformers in compliance with EN 60076 1.

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    • Standard
      33 pages
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This standard applies to liquid to air heat exchangers, using forced air and forced liquid circuits, used on liquid immersed power transformers according to IEC 60076-1 and reactors according to IEC 60076-6 with and without conservator for indoor or outdoor installation. It outlines the service conditions and the mechanical and electrical requirements that are common to this equipment. It also outlines the operation requirements specific to this equipment as well as the preferred dimensions rele...view more

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      25 pages
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This standard applies to liquid to water heat exchangers, using forced water and forced liquid circuits, used on liquid immersed power transformers according to IEC 60076-1 and reactors according to IEC 60076-6 with and without conservator for indoor or outdoor installation. It outlines the service conditions and the mechanical and electrical requirements that are common to this equipment. It also outlines the operation requirements specific to this equipment as well as the preferred dimensions ...view more

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      31 pages
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This standard applies to radiators mounted on liquid immersed power transformers according to IEC 60076-1 and reactors according to IEC 60076-6 with and without conservator for indoor or outdoor installation. It outlines the service conditions and the mechanical and electrical requirements that are common to this equipment. It also outlines the operation requirements specific to this equipment as well as the preferred dimensions relevant for interchangeability and the type and routine tests to b...view more

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      28 pages
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This part of IEC 60076-22 applies to protective devices mounted on liquid-immersed power
transformers in accordance with IEC 60076-1 and reactors in accordance with IEC 60076-6
with or without conservator for indoor or outdoor installation. It outlines the service conditions
and the mechanical and electrical requirements that are common to all the devices, which are
relevant for the safety of the machine having a function of signalization of abnormal operating
conditions.
It also outlines ...
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This part of IEC 60076 applies to dry-type power transformers (including auto-transformers)
having values of highest voltage for equipment up to and including 72,5 kV and at least one
winding operating at greater than 1,1 kV.
This document does not apply to:
• gas-filled dry-type transformers where the gas is not air;
• single-phase transformers rated at less than 5 kVA;
• polyphase transformers rated at less than 15 kVA;
• instrument transformers;
• starting transformers;
• testing tra...
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EN 50588-2 covers, in conjunction with EN 50588-1, transformers under iii) and iv) above, up to 36 kV
(the data from 24 kV to 36 kV are under consideration) and for transformers with rated power less than
or equal to 3150kVA . Further documents exist which may be used by agreement between purchaser
and manufacturer for cable boxes and enclosures. The dimensional requirements for cable boxes and
protective enclosures are not enclosed in this document.

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This European Standard specifies the requirements for cable boxes, Type 1, in which the cable cores
are terminated. The cable boxes are suitable for use on transformers defined in EN 50588-2,
“Transformers with Cable Boxes”, for side mounted or cover mounted use. The cable boxes are
suitable for operation indoors and outdoors under environmental conditions specified in EN 50588-1.
Important design and construction requirements of the cable boxes are given.

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Cable boxes described in this European Standard correspond to cable boxes Type 2 in EN 50588-2
and are suitable for assembly on the cover of oil-immersed distribution transformers meeting the
requirements of EN 50588-2.
Cable boxes are air-filled, metal- or non-metal enclosed, for high- and/or low-voltage connections in the
following variations:
1.1 High-voltage side
a) Connection directly to bushings;
b) Connection via busbar system.
1.2 Low-voltage side
a) Connection directly to bushi...
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This European Standard applies to new three-phase and single-phase power transformers with a highest voltage for equipment exceeding 36 kV and a rated power equal or higher than 5 kVA, or a rated power equal to or higher than 40 MVA regardless of the highest voltage for equipment.
The scope of this European Standard is the following:
-   Defining the appropriate energy efficiency criteria;
-   Setting of benchmark minimum efficiency levels for new transformers based on an assessment of the energy...
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    • Amendment
      4 pages
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This European Standard covers medium power transformers. ‘Medium power transformer’ means a power transformer with a highest voltage for equipment higher than 1,1 kV, but not exceeding 36 kV and a rated power equal to or higher than 5 kVA but lower than 40 MVA.
National practices may require the use of highest voltages for equipment up to (but not including) 52 kV, when the rated voltage is less than 36 kV (such as Um = 38,5 kV or Um = 40,5 kV). This is considered to be an unusual case of a lar...
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    • Standard – translation
      34 pages
      Slovenian language
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This Part of IEC 60076 defines sound pressure and sound intensity measurement methods
from which sound power levels of transformers, reactors and their associated cooling devices
are determined.
NOTE For the purposes of this standard, the term "transformer" frequently means "transformer or reactor".
The methods are applicable to transformers, reactors and their cooling devices – either fitted
to or separate from the transformer – as covered by the IEC 60076 and IEC 61378 series.
This stand...
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