SIST EN 50386:2010/A1:2013

Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled transformers

This European Standard is applicable to ceramic insulated bushings for rated voltages up to 1 000 V, rated currents from 250 A up to 5 000 A and frequencies from 15 Hz up to 60 Hz for insulating liquid filled transformers.

Durchführungen bis 1 kV und von 250 A bis 5 kA für flüssigkeitsgefüllte Transformatoren

Traversées jusqu'à 1 kV et de 250 A à 5 kA, pour transformateurs à remplissage de liquide

Skoznjiki za napetosti do 1 kV in tokove od 250 A do 5 kA za transformatorje, polnjene s tekočino

Ta evropski standard se uporablja za keramične izolirane skoznjike za nazivne napetosti do 1000 V, nazivne tokove od 250 A do 5000 A in frekvence od 15 Hz do 60 Hz za izoliranje transformatorjev, polnjenih s tekočino.

General Information

• Status: Published
• Publication Date: 11-Sep-2013
• ICS: 29.080.20 - Bushings
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: IZL - Insulators
• Current Stage: 6100 - Translation of adopted SIST standards (Adopted Project)
• Start Date: 13-Apr-2022
• Due Date: 12-Apr-2023
• Completion Date: 13-Dec-2023
• Ref Project: EN 50386:2010/A1:2013 - Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled transformers

Relations

• Amends: SIST EN 50386:2010 - Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled transformers
• Effective Date: 01-Oct-2013

Overview

SIST EN 50386:2010/A1:2013 is a European standard developed by CLC/TC 36A focusing on bushings for liquid filled transformers that operate up to 1 kV with current ratings from 250 A to 5 kA. This amendment to the EN 50386:2010 standard was approved in 2013 and sets forth crucial technical specifications and testing requirements for insulated bushings used in transformer applications.

The standard provides consistent guidelines to ensure the safe, reliable, and efficient performance of bushings under specified electrical and mechanical conditions, emphasizing temperature rise limits and insulation criteria. It is intended for implementation by national electrotechnical committees across Europe and harmonizes engineering practices related to low voltage bushings in liquid-filled transformers.

Key Topics

• Voltage and Current Ratings: Specifies bushings designed for voltages up to 1 kV and current ratings ranging from 250 A to 5 kA, tailored for liquid filled transformer environments.
• Temperature Rise Limits: Defines maximum allowable temperature rise for bushings, with particular adjustments:
  • For bushings with current less than 3,150 A, adhering to maximum temperature rise limits as per EN 60137:2008.
  • For bushings with current equal to or above 3,150 A, allows an additional 5 K above the EN 60137:2008 figures.
• Testing and Measurement: Specifies testing methodologies, highlighting that test results can be influenced by test setup and external connections, which should be mutually agreed upon by the manufacturer and purchaser.
• Normative References: Integrates references such as EN 60137:2008 for insulated bushings above 1 kV to align testing and design criteria.

Applications

SIST EN 50386:2010/A1:2013 applies primarily to the design, manufacturing, and testing of bushings used in liquid filled transformers within industries including power generation, utilities, and electrical distribution. Key practical applications include:

• Insulation and electrical connection in medium and low voltage transformers.
• Ensuring thermal management of bushings to prevent overheating and maintain operational integrity.
• Establishing quality assurance protocols for manufacturers and purchasers in equipment procurement and installation.
• Supporting transformer reliability and safety in electrical grids where liquid dielectric coolants are used.

This standard is essential for engineers, designers, and quality control professionals responsible for transformer components, helping them meet regulatory requirements and optimize transformer bushing performance.

Related Standards

• EN 60137:2008 – Insulated bushings for alternating voltages above 1,000 V. This standard is heavily referenced for temperature rise values and insulation requirements.
• IEC 60137:2008 – International counterpart providing fundamental bushing specifications for voltages above 1 kV.
• Other CENELEC member national standards that adapt SIST EN 50386:2010/A1:2013 for local regulatory compliance and market harmonization.

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Keywords: SIST EN 50386:2010/A1:2013, bushings up to 1 kV, liquid filled transformers, insulated bushings, transformer bushings, temperature rise limits, EN 60137, CLC electrical standards, low voltage bushing standards, transformer safety, electrotechnical standards Europe.

Standards Content (Sample)

SIST EN 50386:2010/A1
S L O V E N S K I
S T A N D A R D  oktober 2013

Skoznjiki za napetosti do 1 kV in tokove od 250 A do 5 kA za
transformatorje, polnjene s tekočino

Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled transformers

Traversées jusqu'à 1 kV et de 250 A à 5 kA, pour transformateurs à remplissage
de liquide
Durchführungen bis 1 kV und von 250 A bis 5 kA für flüssigkeitsgefüllte
Transformatoren
Referenčna oznaka
ICS 29.080.20; 29.080 SIST EN 50386:2010/A1:2013 (sl)

Nadaljevanje na straneh I in od 1 do 4

2024-01. Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno.

SIST EN 50386:2010/A1 : 2013
NACIONALNI UVOD
Dopolnilo SIST EN 50368:2010/A1 (sl), Skoznjiki za napetosti do 1 kV in tokove od 250 A do 5 kA za
transformatorje, polnjene s tekočino, 2013, ima status slovenskega dopolnila in je istoveten evropskemu
dopolnilu EN 50386:2010/A1 (en), Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled
transformers, 2013.
NACIONALNI PREDGOVOR
Evropsko dopolnilo EN 50368:2010/A1:2013 je pripravil tehnični odbor Evropskega komiteja za
standardizacijo v elektrotehniki CLC/TC 36A Skoznjiki, katerega tajništvo vodi CEB_BEC.

Slovensko dopolnilo SIST EN 50386:2010/A1:2013 je prevod evropskega dopolnila EN
50386:2010/A1:2013. V primeru spora glede besedila slovenskega prevoda v tem dopolnilu je odločilno
izvirno evropsko dopolnilo v angleškem jeziku. Slovensko izdajo dopolnila je pripravil tehnični odbor
SIST/TC IZL Izolatorji.
Odločitev za privzem tega dopolnila je 6. septembra 2013 sprejel tehnični odbor SIST/TC IZL Izolatorji.

ZVEZA S STANDARDI
S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:

SIST EN 60137:2008 Izolirani skoznjiki za izmenične napetosti nad 1000 V (IEC 60137:2008)
(nadomeščen s SIST EN 60137:2018)

OSNOVA ZA IZDAJO DOPOLNILA
– privzem dopolnila EN 50386:2010/A1:2013

OPOMBE
– Povsod, kjer se v besedilu dopolnila uporablja izraz "evropsko dopolnilo'', v SIST EN
50386:2010/A1:2013 to pomeni "slovensko dopolnilo".

– Nacionalni uvod in nacionalni predgovor nista sestavni del dopolnila.

– Ta nacionalni dokument je istoveten EN 50386:2010/A1:2013 in je objavljen z dovoljenjem

CEN-CENELEC
Upravni center
Avenue Marnix 17
B-1000 Brussels
This national document is identical with EN 50386:2010/A1:2013 and is published with the
permission of
CEN-CENELEC
Management Centre
Avenue Marnix 17
B-1000 Brussels
II
EVROPSKI STANDARD            EN 50386/A1

EUROPEAN STANDARD
avgust 2013
NORME EUROPÉENNE
EUROPÄISCHE NORM
ICS 29.080
Slovenska izdaja
Skoznjiki za napetosti do 1 kV in tokove od 250 A do 5 kA za transformatorje,
polnjene s tekočino
Bushings up to 1 kV and from Traversées jusqu'à 1 kV et de Durchführungen bis 1 kV und
250 A to 5 kA, for liquid filled 250 A à 5 kA, pour von 250 A bis 5 kA für
transformers transformateurs à remplissage flüssigkeitsgefüllte
de liquide Transformatoren
To dopolnilo A1 spreminja evropski standard EN 50386:2010; CENELEC
...

SLOVENSKI STANDARD
01-oktober-2013
6NR]QMLNL]DQDSHWRVWLGRN9LQWRNRYHRG$GRN$]DWUDQVIRUPDWRUMH
SROQMHQHVWHNRþLQR
Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled transformers
Durchführungen bis 1 kV und von 250 A bis 5 kA für flüssigkeitsgefüllte Transformatoren
Traversées jusqu'à 1 kV et de 250 A à 5 kA, pour transformateurs à remplissage de
liquide
Ta slovenski standard je istoveten z: EN 50386:2010/A1:2013
ICS:
29.080.20 Skoznjiki Bushings
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50386/A1
NORME EUROPÉENNE
August 2013
EUROPÄISCHE NORM
ICS 29.180
English version
Bushings up to 1 kV and from 250 A to 5 kA, for liquid filled transformers

Traversées jusqu'à 1 kV et de 250 A à 5 Durchführungen bis 1 kV und von 250 A
kA, pour transformateurs à remplissage bis 5 kA für flüssigkeitsgefüllte
de liquide Transformatoren
This amendment A1 modifies the European Standard EN 50386:2010; it was approved by CENELEC on 2013-07-01.
CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
for giving this amendment the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the
CEN-CENELEC Management Centre or to any CENELEC member.

This amendment exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENEL
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