iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
SIST

SIST EN 61857-21:2001

(Main)

Electrical insulation systems - Procedures for thermal evaluation -- Part 21: Specific requirements for general-purpose model - Wire-wound applications

Electrical insulation systems - Procedures for thermal evaluation -- Part 21: Specific requirements for general-purpose model - Wire-wound applications

This general purpose model (GPM) can be used for the evaluation of wire-wound electrical insulation systems where specific electrotechnical products are not available or required.

Elektrische Isoliersysteme - Verfahren zur thermischen Bewertung -- Teil 21: Spezielle Bedingungen für ein Mehrzweck-Modell - Anwendung bei Drahtwicklungen

Systèmes d'isolation électrique - Procédures d'évaluation thermique -- Partie 21: Exigences particulières pour le modèle d'usage général - Applications aux enroulements à fil

Le présent modèle d'usage général (GPM: abréviation anglaise) peut être utilisé pour l'évaluation de systèmes d'isolation électrique d'enroulements à fils lorsque des produits électrotechniques particuliers ne sont pas disponibles ou nécessaires.

Electrical insulation systems - Procedures for thermal evaluation - Part 21: Specific requirements for general-purpose model - Wire-wound applications

General Information

Status
Withdrawn
Publication Date
31-Aug-2001
Withdrawal Date
24-Jul-2012
ICS
29.080.30 - Insulation systems
Technical Committee
ETC - Electrotechnical technical committe
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
11-Jul-2012
Due Date
03-Aug-2012
Completion Date
25-Jul-2012
Ref Project
EN 61857-21:1999 - Electrical insulation systems - Procedures for thermal evaluation - Part 21: Specific requirements for general-purpose model - Wire-wound applications

Relations

Replaced By
SIST EN 61857-21:2005 - Electrical insulation systems - Procedures for thermal evaluation -- Part 21: Specific requirements for general-purpose models - Wire-wound applications
Effective Date
06-May-2014
Replaced By
SIST EN 61857-21:2005 - Electrical insulation systems - Procedures for thermal evaluation -- Part 21: Specific requirements for general-purpose models - Wire-wound applications
Effective Date
29-Jan-2023

Buy Standard

EN 61857-21:2001EN 61857-21:2001
PreviousNext
Standard
EN 61857-21:2001
English language
13 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 61857-21:2001
01-september-2001
Electrical insulation systems - Procedures for thermal evaluation - Part 21:
Specific requirements for general-purpose model - Wire-wound applications
Electrical insulation systems - Procedures for thermal evaluation -- Part 21: Specific
requirements for general-purpose model - Wire-wound applications
Elektrische Isoliersysteme - Verfahren zur thermischen Bewertung -- Teil 21: Spezielle
Bedingungen für ein Mehrzweck-Modell - Anwendung bei Drahtwicklungen
Systèmes d'isolation électrique - Procédures d'évaluation thermique -- Partie 21:
Exigences particulières pour le modèle d'usage général - Applications aux enroulements
à fil
Ta slovenski standard je istoveten z: EN 61857-21:1999
ICS:
29.080.30 Izolacijski sistemi Insulation systems
SIST EN 61857-21:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 61857-21:2001

---------------------- Page: 2 ----------------------

SIST EN 61857-21:2001

----------
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

SIST
SIST EN IEC 60071-2:2023(Main)
Insulation co-ordination - Part 2: Application guidelines (Proposed horizontal standard)
EN IEC 60071-2:2023

This part of IEC 60071 constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase a.c. systems. Its aim is to give guidance for the determination of the rated withstand voltages for ranges I and II of IEC 60071- 1 and to justify the association of these rated values with the standardized highest voltages for equipment.
This association is for insulation co-ordination purposes only. The requirements for human safety are not covered by this document.
This document covers three-phase a.c. systems with nominal voltages above 1 kV. The values derived or proposed herein are generally applicable only to such systems. However, the concepts presented are also valid for two-phase or single-phase systems.
This document covers phase-to-earth, phase-to-phase and longitudinal insulation.
This document is not intended to deal with routine tests. These are to be specified by the relevant product committees.
The content of this document strictly follows the flow chart of the insulation co-ordination process presented in Figure 1 of IEC 60071-1:2019. Clauses 5 to 8 correspond to the squares in this flow chart and give detailed information on the concepts governing the insulation coordination process which leads to the establishment of the required withstand levels.
This document emphasizes the necessity of considering, at the very beginning, all origins, all classes and all types of voltage stresses in service irrespective of the range of highest voltage for equipment. Only at the end of the process, when the selection of the standard withstand voltages takes place, does the principle of covering a particular service voltage stress by a standard withstand voltage apply. Also, at this final step, this document refers to the correlation made in IEC 60071-1 between the standard insulation levels and the highest voltage for equipment.
The annexes contain examples and detailed information which explain or support the concepts described in the main text, and the basic analytical techniques used.

  • Standard
    187 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Draft
    180 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60071-11:2023(Main)
Insulation co-ordination - Part 11：Definitions, principles and rules for HVDC system
EN IEC 60071-11:2022

IEC 60071-11:2022 applies to high-voltage direct current (HVDC) systems. It specifies the principles on the procedures for the determination of the specified withstand voltages, creepage distance and air clearances for the equipment and the installations of these systems.
This document gives the insulation co-ordination principles related to line commutated converter (LCC) and voltage sourced converters (VSC) HVDC systems. The main principles of this document also apply to other special converter configurations of LCC, such as the capacitor commutated converter (CCC) as well as the controlled series compensated converter (CSCC), etc.
This document applies to insulation co-ordination of equipment connected between the converter AC bus (including the AC harmonic filters, the converter transformer, the circuit breakers) and the DC line side. The line and cable terminations in so far as they influence the insulation co-ordination of converter station equipment are also covered.
This document applies only for HVDC applications in power systems and not for industrial conversion equipment. Principles and guidance given are for insulation co-ordination purposes only. The requirements for human safety are not covered by this document.
This international standard replaces, in conjunction with IEC 60071-12, IEC 60071-5 published in 2014.
This edition includes the following significant technical changes with respect to IEC 60071‑5:2014:


       
  1. This standard applies to both LCC and VSC HVDC systems whereas IEC 60071-5 only dealt with LCC HVDC system;

    2.    
  2. Annex C (normative) gives the recommended specified withstand voltage (LI and SI);

    3.    
  3. Annex C (normative) gives the minimum air clearances;

    4.    
  4. Annex E shows the correlation of clauses between this standard and IEC 60071-5:2014.

  • Standard
    41 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Draft
    36 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60034-18-1:2023(Main)
Rotating electrical machines - Part 18-1: Functional evaluation of insulation systems - General guidelines
EN IEC 60034-18-1:2023

This part of IEC 60034 deals with the general guidelines for functional evaluation of electrical insulation systems, used or proposed to be used in rotating electrical machines within the scope of IEC 60034-1, in order to qualify them.

  • Standard
    22 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Draft
    17 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60071-12:2023(Main)
Insulation co-ordination - Part 12: Application guidelines for LCC HVDC converter stations
EN IEC 60071-12:2022

This part of IEC 60071 applies guidelines on the procedures for insulation co-ordination of line
commutated converter (LCC) stations for high-voltage direct current (HVDC) project, whose aim
is evaluating the overvoltage stresses on the converter station equipment subjected to
combined DC, AC power frequency, harmonic and impulse voltages, and determining the
specified withstand voltages for equipment.
This document deals only with metal-oxide surge arresters, without gaps, which are used in
modern HVDC converter stations. The criteria for determining the protective levels of series
and/or parallel combinations of surge arresters used to ensure optimal protection are also
presented. Typical arrester protection schemes and stresses of arresters are presented.
Annex A contains examples of insulation co-ordination for LCC HVDC converters which support
the concepts described in the main text, and the basic analytical techniques used.

  • Standard
    68 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Draft
    63 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60034-18-32:2022(Main)
Rotating electrical machines - Part 18-32: Functional evaluation of insulation systems (Type II) - Electrical endurance qualification procedures for form-wound windings IEC 60034-18-32:2022)
EN IEC 60034-18-32:2022

This part of IEC 60034-18 describes qualification procedures for the evaluation of electrical endurance of insulation systems for use in rotating electrical machines using form-wound windings. The test procedures are comparative in nature, such that the performance of a candidate insulation system is compared to that of a reference insulation system with proven service experience. If no reference system is available, the diagram in Annex A is available for use. The qualification procedures of inverter duty insulation system for form-wound windings can be found in IEC 60034-18-42 or IEC 60034-18-41.

  • Standard
    29 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Draft
    25 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 60034-18-41:2014/A1:2020/AC:2021(Corrigendum)
Rotating electrical machines - Part 18-41: Partial discharge free electrical insulation systems (Type I) used in electrical rotating machines fed from voltage converters - Qualification and quality control tests (IEC 60034-18-41:2014/A1:2019/COR1:2020)
EN 60034-18-41:2014/A1:2019/AC:2020-12

2020-12-25 - IEC Corrected Version

  • Corrigendum
    4 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN 60034-18-42:2018/A1:2021(Amendment)
Rotating electrical machines - Part 18-42: Partial discharge resistant electrical insulation systems (Type II) used in rotating electrical machines fed from voltage converters - Qualification tests (IEC 60034-18-42:2017/A1:2020)
EN 60034-18-42:2017/A1:2020
  • Amendment
    11 pages
    English language
    sale 10% off
    e-Library read for
    1 day
  • Draft
    8 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60664-1:2020/AC:2021(Corrigendum)
Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests (IEC 60664-1:2020/COR1:2020)
EN IEC 60664-1:2020/AC:2020-12

TAN - // IEC Corrigendum

  • Corrigendum
    4 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 60664-1:2020(Main)
Insulation coordination for equipment within low-voltage supply systems - Part 1: Principles, requirements and tests (IEC 60664-1:2020)
EN IEC 60664-1:2020

This part of IEC 60664 deals with insulation coordination for equipment having a
rated voltage up to AC 1 000 V or DC 1 500 V connected to low-voltage supply systems.
This document applies to frequencies up to 30 kHz.
NOTE 1 Requirements for insulation coordination for equipment within low-voltage supply systems with rated
frequencies above 30 kHz are given in IEC 60664-4.
NOTE 2 Higher voltages can exist in internal circuits of the equipment.
It applies to equipment for use up to 2 000 m above sea level and provides guidance for use
at higher altitudes (See 5.2.3.4).
It provides requirements for technical committees to determine clearances, creepage
distances and criteria for solid insulation. It includes methods of electrical testing with
respect to insulation coordination.
The minimum clearances specified in this document do not apply where ionized gases are
present. Special requirements for such situations can be specified at the discretion of the
relevant technical committee.
This document does not deal with distances:
– through liquid insulation;
– through gases other than air;
– through compressed air.
This basic safety publication focusing on safety essential requirements is primarily intended
for use by technical committees in the preparation of standards in accordance with the
principles laid down in IEC Guide 104 and ISO/IEC Guide 51.
One of the responsibilities of a technical committee is, wherever applicable, to make use of
basic safety publications in the preparation of its publications.
However, in case of missing specified values for clearances, creepage distances and
requirements for solid insulation in the relevant product standards, or even missing
standards, this document applies.

  • Standard
    85 pages
    English language
    sale 10% off
    e-Library read for
    1 day
SIST
SIST EN IEC 61857-32:2020(Main)
Electrical insulation systems - Procedures for thermal evaluation - Part 32: Multifactor evaluation with increased factors during diagnostic testing (IEC 61857-32:2019)
EN IEC 61857-32:2019

EN-IEC 61857 series is focused on applications where other possible factors need to be incorporated to evaluate any influence on the performance of the electrical insulation system (EIS). Multi- factor evaluation is the most complex type of project to design and conduct. Clear guidelines are needed to give the user of this document a uniform approach and a method to analyse the test results. This document is for applications where the stresses are some combination of other factors of influence identified in IEC 60505. The multi-factor stresses are applied during the diagnostic portion of each test cycle. A few examples of other factors of influence or multi-factor stresses are: - high vibration; - submersion in oils, water, or solutions; - voltage higher than the test voltage of the reference EIS; - decreased cold shock temperature.

  • Standard
    20 pages
    English language
    sale 10% off
    e-Library read for
    1 day