EN 61557-9:1999

Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systems

Specifies the requirements for insulation fault location systems which localize insulation faults in any part of the system in unearthed IT a.c. systems and unearthed IT a.c. systems with galvanically d.c. circuits having nominal voltages up to 1000 V a.c., as well as in unearthed IT d.c. systems with voltages up to 1500 V d.c., independent of the measuring principle. This part is to be used in conjunction with IEC 61557-1.

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 9: Einrichtungen zur Isolationsfehlersuche in IT-Systemen

Sécurité électrique dans les réseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de protection - Partie 9: Dispositifs de location de défauts d'isolement pour réseaux IT

Etablit les prescriptions particulières applicables aux dispositifs de localisation de défauts d'isolement qui, indépendamment du principe de mesure, peuvent localiser des parties de réseaux en défaut dans des réseaux IT c.a. non mis à la terre ou dans des réseaux IT c.a. non mis à la terre comprenant des circuits à courant continu reliés galvaniquement dont les tensions nominales sont égales ou inférieures à 1000 V c.a., ainsi que dans les réseaux IT c.c. non mis à la terre dont les tensions nominales sont égales ou inférieures à 1500 V c.c. Cette norme doit être utilisée conjointement avec la CEI 61557-1.

Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti do 1 kV in enosmerne napetosti do 1,5 kV – Oprema za preskušanje, merjenje ali nadzorovanje zaščitnih ukrepov – 9. del: Oprema za ugotavljanje mesta izolacijske okvare v sistemih IT (IEC 61557-9:1999)

General Information

• Status: Withdrawn
• Publication Date: 03-Nov-1999
• Withdrawal Date: 30-Sep-2002
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 33.100 - Electromagnetic compatibility (EMC)
• Technical Committee: CLC/SR 85 - Measuring equipment for electrical and electromagnetic quantities
• Drafting Committee: IEC/TC 85 - IEC_TC_85
• Parallel Committee: IEC/TC 85 - IEC_TC_85
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-Feb-2012
• Completion Date: 01-Feb-2012
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: SIST EN 61557-9:2000 - Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures -- Part 9: Equipment for insulation fault location in IT systems

Relations

• Replaced By: EN 61557-9:2009 - Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systems
• Effective Date: 29-Jan-2023

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen -- Teil 9: Einrichtungen zur Isolationsfehlersuche in IT-SystemenSécurité électrique dans les réseaux de distribution basse tension de 1 000 V c.a. et 1 500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de protection -- Partie 9: Dispositifs de location de défauts d'isolement pour réseaux ITElectrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures -- Part 9: Equipment for insulation fault location in IT systems29.240.01Power transmission and distribution networks in general29.080.01VSORãQRElectrical insulation in general17.220.20Measurement of electrical and magnetic quantitiesICS:Ta slovenski standard je istoveten z:EN 61557-9:1999SIST EN 61557-9:2000en01-junij-2000SIST EN 61557-9:2000SLOVENSKI
STANDARD
NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD61557-9Première éditionFirst edition1999-09Sécurité électrique dans les réseauxde distribution basse tension de 1 000 V c.a.et 1 500 V c.c. –Dispositifs de contrôle, de mesure oude surveillance de mesures de protection –Partie 9:Dispositifs de localisation de défautsd'isolement pour réseaux ITElectrical safety in low voltage distributionsystems up to 1 000 V a.c. and 1 500 V d.c. –Equipment for testing, measuring ormonitoring of protective measures –Part 9:Equipment for insulation fault locationin IT systems Commission Electrotechnique Internationale International Electrotechnical CommissionPour prix, voir catalogue en vigueurFor price, see current catalogue IEC 1999
Droits de reproduction réservés
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Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite niutilisée sous quelque forme que ce soit et par aucun procédé,électronique ou mécanique, y compris la photo-copie et lesmicrofilms, sans l'accord écrit de l'éditeur.No part of this publication may be reproduced or utilized inany form or by any means, electronic or mechanical,including photocopying and microfilm, without permission inwriting from the publisher.International Electrotechnical Commission3, rue de Varembé
Geneva, SwitzerlandTelefax: [phone]e-mail: [e-mail] IEC web site
http://www.iec.chCODE PRIXPRICE CODEL

61557-9 © IEC:1999– 3 –CONTENTSPageFOREWORD.5Clause1Scope.72Normative references.73Definitions.94Requirements.115Marking and operating instructions.135.1Marking.135.2Operating instructions.136Tests.156.1Type test.156.1.1Response sensitivity of the insulation fault location system.156.1.2Test current (IT).156.1.3Alarm indicator.156.1.4Clearance and creepage distances.156.1.5Dielectric test.176.1.6Electromagnetic compatibility (EMC).176.1.7Additional requirements.176.1.8Marking and operating instructions.176.2Routine tests.176.2.1Response sensitivity.176.2.2Test current (IT).176.2.3Alarm indicator.176.2.4Dielectric test.176.2.5Marking and operating instructions.176.2.6Record of routine tests.176.3Example of a test matrix for type and routine tests.19Figure 1 – Example of the components included in an insulation fault location system.23Table 1 – Requirements for insulation fault location systems.21

61557-9 © IEC:1999– 5 –ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMSUP TO 1 000 V AC AND 1 500 V DC –EQUIPMENT FOR TESTING, MEASURING OR MONITORINGOF PROTECTIVE MEASURES –Part 9: Equipment for insulation fault location in IT systemsFOREWORD1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isentrusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the International Organizationfor Standardization (ISO) in accordance with conditions determined by agreement between the twoorganizations.2)The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects since each technical committee has representationfrom all interested National Committees.3)The documents produced have the form of recommendations for international use and are published in the formof standards, technical specifications, technical reports or guides and they are accepted by the NationalCommittees in that sense.4)
In order to promote international unification, IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding national or regional standard shall be clearlyindicated in the latter.5)
The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be in conformity with one of its standards.6)Attention is drawn to the possibility that some of the elements of this International Standard may be the subjectof patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.This part of IEC 61557 has been prepared by IEC technical committee 85: Measuringequipment for electrical and electromagnetic quantities.The text of this standard is based on the following documents:FDISReport on voting85/203/FDIS85/206/RVDFull information on voting for the approval of this standard can be found in the report on votingindicated in the above table.This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.The committee has decided that this publication remains valid until 2005. At this date, inaccordance with the committee's decision, the publication will be•reconfirmed;•withdrawn;•replaced by a revised edition; or•amended.This part 9 of IEC 61557 shall be used in conjunction with part 1.

61557-9 © IEC:1999– 7 –ELECTRICAL SAFETY IN LOW VOLTAGE DISTRIBUTION SYSTEMSUP TO 1 000 V AC AND 1 500 V DC –EQUIPMENT FOR TESTING, MEASURING OR MONITORINGOF PROTECTIVE MEASURES –Part 9: Equipment for insulation fault location in IT systems1 ScopeThis part of IEC 61557 specifies the requirements for insulation fault location systems whichlocalize insulation faults in any part of the system in unearthed IT a.c. systems and unearthedIT a.c. systems with galvanically connected d.c. circuits having nominal voltages up to 1 000 Va.c., as well as in unearthed IT d.c. systems with voltages up to 1 500 V d.c., independent ofthe measuring principle. This part is to be used in conjunction with IEC 61557-1.NOTE 1 – IT systems are described in IEC 60364-4-41 amongst other literature. Additional data for a selection ofdevices in other standards should be noted.NOTE 2 – Further information on insulation fault location can be found in the following standards: IEC 60364-4-41,subclause 413.1.5.4, and IEC 60364-5-53, subclause 531.3.NOTE 3 – An insulation fault location system usually consists of several functional modules (see figure 1). All orsome of the functional modules may be combined in one device. The functional modules and a short description oftheir function are mentioned below:–insulation monitoring device according to IEC 61557-8;–control device, portable or permanently installed: the control device specifies the sequence of the testprocedure and contains logical operations for insulation fault location and for fault alarm;–test device, portable or permanently installed: the test device contains the test current generator;–coupling unit, portable or permanently installed: the coupling unit in combination with the test device constitutesthe connection to the system to be monitored;–residual current transformer or current clamp: these are used for the detection of the test current and areconnected to an evaluator;–evaluator, portable or permanently installed: the residual current transformers are connected to the evaluator todetect the test current.NOTE 4 – Note 3 gives an example of the functional modules in insulation fault location systems. The combinationof modules may vary depending on the version (portable or permanently installed).NOTE 5 – Insulation fault location systems with an independent test current source may also be used for insulationfault location in de-energized systems.2 Normative referencesThe following normative documents contain provisions which, through reference in this text,constitute provisions of this part of IEC 61557. For dated references, subsequent amendmentsto, or revisions of, any of these publications do not apply. However, parties to agreementsbased on this part of IEC 61557 are encouraged to investigate the possibility of applying themost recent editions of the normative documents indicated below. For undated references, thelatest edition of the normative document referred to applies. Members of IEC and ISO maintainregisters of currently valid International Standards.

61557-9 © IEC:1999– 9 –IEC 60255-5:1977, Electrical relays – Part 5: Insulation tests for electrical relaysIEC 60255-6:1988, Electrical relays – Part 6: Measuring relays and protection equipmentIEC 60364-4-41:1992, Electrical installations of buildings – Part 4: Protection for safety –Chapter 41: Protection against electric shockIEC 60364-5-53:1994, Electrical installations of buildings – Part 5: Selection and erection ofelectrical equipment – Chapter 53: Switchgear and controlgearIEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems – Part 1:Principles, requirements and testsIEC 60721-3-1:1997, Classification of environmental conditions – Part 3: Classification ofgroups of environmental parameters and their severities – Section 1: StorageIEC 60721-3-2:1997, Classification of environmental conditions – Part 3: Classification ofgroups of environmental parameters and their severities – Section 2: TransportationIEC 60721-3-3:1994, Classification of environmental conditions – Part 3: Classification ofgroups of environmental parameters and their severities – Section 3: Stationary use atweatherprotected locationsIEC 61010-2-032:1994, Safety requirements for electrical equipment for measurement, controland laboratory use – Part 2-032: Particular requirements for hand-held current clamps forelectrical measurement and testIEC 61326-1:1997, Electrical equipment for measurement, control and laboratory use – EMCrequirements – Part 1: General requirementsAmendment 1, 1998IEC 61557-1:1997, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 1:General requirementsIEC 61557-8:1997, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 8:Insulation monitoring devices for IT systems3 DefinitionsFor the purposes of this part of IEC 61557, the definitions given in IEC 61557-1 and IEC 61557-8and the following definitions apply.3.1insulation fault location systemusually an insulation monitoring device which permanently monitors the insulation resistance ofan unearthed IT system and additional insulation fault location modules, which are activated ifan insulation fault is detected. The insulation fault location modules simultaneously mayperform the function of injecting a test current between the electrical system and earth tolocate the sections of the IT system with insulation faults. The insulation fault location systemmay consist of several functional modules combined in one deviceNOTE – Insulation monitoring devices are defined in IEC 61557-8.

61557-9 © IEC:1999– 11 –3.2test current ITr.m.s. value of the current that can flow through the test device of the insulation fault locationsystem during the location process. The current can be generated by a test voltage source orgenerated by the system to be monitoredNOTE – The maximum test current should be considered for the application.3.3test voltage UTr.m.s. value of the vol
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