EN 60099-5:1996/A1:1999
(Amendment)Surge arresters - Part 5: Selection and application recommendations
Surge arresters - Part 5: Selection and application recommendations
EN following parallel vote * Superseded by EN 60099-5:2013
Überspannungsableiter - Teil 5: Anleitung für die Auswahl und die Anwendung
Parafoudres - Partie 5: Recommandations pour le choix et l'utilisation
Prenapetostni odvodniki - 5. del: Izbira in priporočila za uporabo (IEC 60099-5:1996/A1:1999)
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60099-5:1998/A1:2002
01-november-2002
3UHQDSHWRVWQLRGYRGQLNLGHO ,]ELUDLQSULSRURþLOD]DXSRUDER ,(&
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Surge arresters -- Part 5: Selection and application recommendations
Überspannungsableiter -- Teil 5: Anleitung für die Auswahl und die Anwendung
Parafoudres -- Partie 5: Recommandations pour le choix et l'utilisation
Ta slovenski standard je istoveten z: EN 60099-5:1996/A1:1999
ICS:
29.240.10 Transformatorske postaje. Substations. Surge arresters
Prenapetostni odvodniki
SIST EN 60099-5:1998/A1:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60099-5:1998/A1:2002
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SIST EN 60099-5:1998/A1:2002
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SIST EN 60099-5:1998/A1:2002
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SIST EN 60099-5:1998/A1:2002
NORME CEI
INTERNATIONALE IEC
60099-5
INTERNATIONAL
1996
STANDARD
AMENDEMENT 1
AMENDMENT 1
1999-10
Amendement 1
Parafoudres –
Partie 5:
Recommandations pour le choix et l'utilisation –
Section 1: Généralités
Amendment 1
Surge arresters –
Part 5:
Selection and application recommendations –
Section 1: General
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Commission Electrotechnique Internationale
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PRICE CODE
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Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 60099-5:1998/A1:2002
60099-5 Amend. 1 © IEC:1999 – 3 –
FOREWORD
This amendment has been prepared by IEC technical committee 37: Surge arresters.
The text of the amendment is based on the following documents:
FDIS Report on voting
37/224/FDIS 37/230/RDV
Full information of the voting of the approval of this amendment can be found in the report on
voting indicated in the above table.
Page 73
Section 6: Monitoring (supervision)
Replace the title and text of this section by the following:
Section 6: Diagnostic indicators of metal-oxide surge arresters in service
6.1 General
Apart from brief occasions when a surge arrester is functioning as an overvoltage-limiting
device, it is expected to behave as an insulator. The insulating properties are essential for the
length of life of the arrester and for the operation reliability of the power system.
Various diagnostic methods and indicators for revealing possible deterioration or failure of the
insulating properties have been utilized since the introduction of surge arresters. The
diagnostic methods range from fault indicators and disconnectors for indication of complete
arrester failures, to instruments that are able to measure slight changes in the resistive
leakage current or the power loss of metal-oxide arresters.
The aim of this section is to provide guidance to the user if use of any diagnostic method is
considered, and to present an overview of common diagnostic methods. It also gives detailed
information about leakage current measurements on metal-oxide arresters.
NOTE 1 – Diagnostic devices should be designed and handled in order to provide personal safety during
measurement. Permanently installed devices should be designed and installed with the operational and short-circuit
stresses taken into consideration.
NOTE 2 – For several diagnostic methods, an insulated earth terminal is required on the arrester. The earth
terminal should have a sufficiently high withstand voltage level to account for the inductive voltage drop appearing
between the terminal and the earthed structure during an impulse discharge.
6.1.1 Fault indicators
Fault indicators give a clear visual indication of a failed arrester, without disconnecting the
arrester from the line. The device may be an integrated part of the arrester, or a separate unit
installed in series with the arrester. The working principle is usually based on the amplitude
and duration of the arrester current, or on the temperature of the non-linear metal-oxide
resistors.
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SIST EN 60099-5:1998/A1:2002
60099-5 Amend. 1 © IEC:1999 – 5 –
6.1.2 Disconnectors
Disconnectors, often used on medium-voltage arresters, give a visual indication of a failed
arrester by disconnecting it from the system. The typical working principle is an explosive
device triggered by the fault current; however, the disconnector is not intended to extinguish
the fault current. The disconnector may be an integral part of the arrester or insulating bracket,
or a separate unit installed in series with the arrester. The advantage of the device is that the
line remains in operation after disconnection o
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