SIST EN 62689-1:2017

Current and Voltage sensors or detectors, to be used for fault passage indication purposes - Part 1: System aspects (IEC 62689-1:2016)

IEC 62689-1:2016 defines the minimum requirements (therefore performances) and consequent classification and tests (with the exception of functional and communication ones) for fault passage indicators (FPIs) and distribution substation units (DSUs) (including their current and/or voltage sensors), which are, respectively, a device or a device/combination of devices and/or functions able to detect faults and provide indications about their localization.

Strom- und Spannungs-Sensoren oder Anzeigegeräte zur Erkennung von Kurz- und Erdschlüssen - Teil 1: Allgemeine Grundsätze und Anforderungen

Capteurs ou détecteurs de courant et de tension, à utiliser pour indiquer le passage d'un courant de défaut - Partie 1: Exigences et principes généraux

L'IEC 62689-1:2016 définit les exigences (et donc les performances) minimales, ainsi que les classifications des essais qui en découlent (à l'exception des essais fonctionnels et de communications) pour les indicateurs de passage de courant de défaut (FPI) et les unités de poste de distribution (DSU) (y compris pour leurs capteurs de courant et/ou de tension) qui sont respectivement matérialisés par un dispositif ou un dispositif/une combinaison de dispositifs et/ou de fonctions pouvant détecter des défauts et les localiser.

Tokovna in napetostna zaznavala ali detektorji, ki se uporabljajo za javljanje mesta okvare - 1. del: Sistemski vidiki (IEC 62689-1:2016)

Ta del standarda IEC 62689 določa minimalne zahteve (in s tem zmogljivosti) in posledično razvrstitev ter preskuse (z izjemo funkcionalnih in komunikacijskih preskusov) za javljalnike mesta okvare (FPI) in distribucijske postaje (DSU) (vključno z njihovimi zaznavali za tok in/ali napetost), ki so naprava ali naprava/skupek naprav in/ali funkcij, ki lahko zaznajo okvare in podajo indikacije glede njihove lokalizacije.
Lokalizacija okvare pomeni mesto okvare glede na mesto namestitve javljalnika mesta okvare/distribucijske postaje v omrežju (na visoko- ali nizkonapetostni strani glede na javljalnik mesta okvare/distribucijsko postajo) ali smer okvarnega toka, ki teče skozi javljalnik mesta okvare/distribucijsko postajo. Lokalizacija okvare se lahko pridobi
• neposredno od javljalnika mesta okvare/distribucijske postaje ali
• pri centralnem sistemu z uporabo informacij več javljalnikov mesta okvare ali distribucijskih postaj,
ob upoštevanju lastnosti in obratovalnih pogojev električnega sistema, v katerem so nameščeni javljalniki mesta okvare/distribucijske postaje.
V tem delu standarda IEC 62689 je podrobno določena razvrstitev javljalnikov mesta okvare/distribucijskih postaj v skladu s prvo »osnovno« razvrstitvijo, opredeljeno v standardu IEC 62689-2, ki se izrecno osredotoča na opis električnih pojavov in odziv električnega sistema v času okvar, ob upoštevanju najbolj razpršene arhitekture distribucijskega omrežja in tipologij okvar.
Zato je standard IEC 62689-2 osredotočen predvsem na pomoč uporabnikom pri pravilni izbiri javljalnikov mesta okvare/distribucijskih postaj, medtem ko so standardi IEC 62689-1, IEC 62689-3 in IEC 62689-4 osredotočeni predvsem na zahteve, komunikacijo in preskusne postopke za javljalnike mesta okvare/distribucijske postaje.

General Information

• Status: Published
• Publication Date: 08-Jan-2017
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Jan-2017
• Due Date: 11-Mar-2017
• Completion Date: 09-Jan-2017
• Ref Project: EN 62689-1:2016 - Current and voltage sensors or detectors, to be used for fault passage indication purposes - Part 1: General principles and requirements

Overview

EN 62689-1:2016 (CLC) - harmonized with IEC 62689-1:2016 - sets the general principles and minimum performance requirements for current and voltage sensors or detectors used for fault passage indication (FPI) in power distribution networks. The standard covers Fault Passage Indicators (FPIs) and Distribution Substation Units (DSUs), including their current/voltage sensors, classification and type tests (excluding functional and communication tests). It defines terms, application scenarios, performance classes and test-related requirements needed to detect and indicate fault passage and support fault localization.

Key topics and technical requirements

• Scope & definitions: common terminology for FPIs, DSUs, sensors, neutral treatment, and ratings.
• Sensor accuracy and performance: minimum expectations for current and voltage sensing accuracy and reliability for fault detection.
• System aspects: guidance on selection of FPI requirements according to network topology, fault types and neutral point treatment.
• Applications by installation type: considerations for overhead lines vs. underground cables and for single-phase, three-phase and residual current detection.
• FPI/DSU architecture: roles of sensors, signal transmission to the Conditioning, Processing and Indicating Unit (CPIU), and Human–Machine Interface (HMI) for local and remote displays.
• Classification & usage classes: performance and capability classes covering fault detection capability, communication capability, power supply class and optional feature classes.
• Testing & service conditions: environmental, dielectric and EMC-related test requirements referenced to established IEC test standards (note: functional and communication tests are outside Part 1).

Applications and who uses this standard

EN 62689-1 is intended for:

• Electric utilities and distribution network operators - selecting and specifying FPIs/DSUs to speed fault localization and reduce outage time.
• Manufacturers and integrators - designing current/voltage sensors, CPIUs and DSUs that meet minimum performance and classification requirements.
• Test laboratories and certification bodies - performing type tests and environmental/EMC verification aligned with the standard.
• Procurement teams and regulators - defining conformance criteria, interoperability and performance classes for contracts and grid codes.

Practical benefits include improved fault localization, faster restoration, consistent device classification, and clearer guidance for integrating FPIs/DSUs into SCADA and distribution automation.

Related standards

EN 62689-1 references and aligns with established IEC standards used in testing and integration, including (but not limited to): IEC 61850 (power utility communication), IEC 61000 EMC series, IEC 60068 environmental tests, IEC 60255-27 (product safety for protection equipment), IEC 60060-1 (high-voltage test techniques) and related instrument transformer standards. Part 1 focuses on system aspects; complementary documents (e.g., EN/IEC 62689-2) address other functional areas.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2017
Tokovna in napetostna zaznavala ali detektorji, ki se uporabljajo za javljanje mesta
okvare - 1. del: Sistemski vidiki (IEC 62689-1:2016)
Current and Voltage sensors or detectors, to be used for fault passage indication
purposes - Part 1: System aspects (IEC 62689-1:2016)
Ta slovenski standard je istoveten z: EN 62689-1:2016
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 62689-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2016
ICS 17.220.20
English Version
Current and voltage sensors or detectors, to be used for fault
passage indication purposes - Part 1: General principles and
requirements
(IEC 62689-1:2016)
Capteurs ou détecteurs de courant et de tension, à utiliser Strom- und Spannungs-Sensoren oder Anzeigegeräte zur
pour indiquer le passage d'un courant de défaut - Erkennung von Kurz- und Erdschlüssen - Teil 1: Allgemeine
Partie 1: Exigences et principes généraux Grundsätze und Anforderungen
(IEC 62689-1:2016) (IEC 62689-1:2016)
This European Standard was approved by CENELEC on 2016-06-16. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 European Standard 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.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62689-1:2016 E
European foreword
The text of document 38/503/FDIS, future edition 1 of IEC 62689-1, prepared by IEC/TC 38
"Instrument transformers" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 62689-1:2016.
The following dates are fixed:
(dop) 2017-06-16
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2019-12-16
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62689-1:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60044-7 NOTE Harmonized as EN 60044-7.
IEC 60044-8 NOTE Harmonized as EN 60044-8.
IEC 60068-2-64 NOTE Harmonized as EN 60068-2-64.
IEC 60068-2-75 NOTE Harmonized as EN 60068-2-75.
IEC 60255-1:2009 NOTE Harmonized as EN 60255-1:2010 (not modified).
IEC 60660 NOTE Harmonized as EN 60660
IEC 60695-1-10 NOTE Harmonized as EN 60695-1-10.
IEC 60721-3-3 NOTE Harmonized as EN 60721-3-3.
IEC 60721-3-4 NOTE Harmonized as EN 60721-3-4.
IEC 61000-4-30 NOTE Harmonized as EN 61000-4-30.
IEC 61109 NOTE Harmonized as EN 61109.
IEC 61850-6 NOTE Harmonized as EN 61850-6.
IEC 61850-7-3 NOTE Harmonized as EN 61850-7-3.
IEC 61850-7-4 NOTE Harmonized as EN 61850-7-4.
IEC 61869-1 NOTE Harmonized as EN 61869-1.
IEC 61869-2 NOTE Harmonized as EN 61869-2.
IEC 61869-3 NOTE Harmonized as EN 61869-3.
IEC 61869-4 NOTE Harmonized as EN 61869-4.
IEC 61869-6 NOTE Harmonized as EN 61869-6.
IEC 62262 NOTE Harmonized as EN 62262.
IEC 62689-2 NOTE Harmonized as EN 62689-2.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year

IEC 60028 -  International standard of resistance for - -
copper
1)
IEC 60038 -  IEC standard voltages EN 60038 -
IEC 60060-1 -  High-voltage test techniques - EN 60060-1 -
Part 1: General definitions and test
requirements
IEC 60068-2-1 -  Environmental testing - EN 60068-2-1 -
Part 2-1: Tests - Test A: Cold
IEC 60068-2-14 -  Environmental testing - EN 60068-2-14 -
Part 2-14: Tests - Test N: Change of
temperature
IEC 60068-2-2 -  Environmental testing - EN 60068-2-2 -
Part 2-2: Tests - Test B: Dry heat
IEC 60068-2-6 -  Environmental testing - EN 60068-2-6 -
Part 2-6: Tests - Test Fc: Vibration
(sinusoidal)
IEC 60068-2-30 -  Environmental testing - EN 60068-2-30 -
Part 2-30: Tests - Test Db: Damp heat,
cyclic (12 h + 12 h cycle)
IEC 60068-2-78 -  Environmental testing - EN 60068-2-78 -
Part 2-78: Tests - Test Cab: Damp heat,
steady state
IEC 60071-1 -  Insulation co-ordination - EN 60071-1 -
Part 1: Definitions, principles and rules
IEC 60085 -  Electrical insulation - Thermal evaluation EN 60085 -
and designation
IEC 60121 -  Recommendation for commercial annealed - -
aluminium electrical conductor wire
IEC 60270 -  High-voltage test techniques - Partial EN 60270 -
discharge measurements
IEC 60417-DB -  Graphical symbols for use on equipment - -

1)
The title of EN 60038 is “CENELEC standard voltages”.
Publication Year Title EN/HD Year

IEC 60455 Series Resin based reactive compounds used for EN 60455 Series
electrical insulation
IEC 60529 -  Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC 60695-1-30 -  Fire hazard testing - EN 60695-1-30 -
Part 1-30: Guidance for assessing the fire
hazard of electrotechnical products -
Preselection testing process - General
guidelines
IEC 60695-7-1 -  Fire hazard testing - EN 60695-7-1 -
Part 7-1: Toxicity of fire effluent - General
guidance
IEC/TS 60815 Series Selection and dimensioning of high-voltage - -
insulators intended for use in polluted
conditions
IEC/TS 60815-1 -  Selection and dimensioning of high-voltage - -
insulators intended for use in polluted
conditions -
Part 1: Definitions, information and general
principles
IEC/TS 60815-2 -  Selection and dimensioning of high-voltage - -
insulators intended for use in polluted
conditions -
Part 2: Ceramic and glass insulators for
a.c. systems
IEC/TS 60815-3 -  Selection and dimensioning of high-voltage - -
insulators intended for use in polluted
conditions -
Part 3: Polymer insulators for a.c. systems
IEC 60870-5-101 -  Telecontrol equipment and systems - EN 60870-5-101 -
Part 5-101: Transmission protocols -
Companion standard for basic telecontrol
tasks
IEC 60870-5-104 -  Telecontrol equipment and systems - EN 60870-5-104 -
Part 5-104: Transmission protocols -
Network access for IEC 60870-5-101 using
standard transport profiles
IEC 61000-4-10 -  Electromagnetic compatibility (EMC) - EN 61000-4-10 -
Part 4-10: Testing and measurement
techniques - Damped oscillatory magnetic
field immunity test
IEC 61000-4-11 -  Electromagnetic compatibility (EMC) - EN 61000-4-11 -
Part 4-11: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations
immunity tests
IEC 61000-4-12 -  Electromagnetic compatibility (EMC) - EN 61000-4-12 -
Part 4-12: Testing and measurement
techniques - Ring wave immunity test
Publication Year Title EN/HD Year

IEC 61000-4-16 -  Electromagnetic compatibility (EMC) - EN 61000-4-16 -
Part 4-16: Testing and measurement
techniques - Test for immunity to
conducted, common mode disturbances in
the frequency range 0 Hz to 150 kHz
IEC 61000-4-18 -  Electromagnetic compatibility (EMC) - EN 61000-4-18 -
Part 4-18: Testing and measurement
techniques - Damped oscillatory wave
immunity test
IEC 61000-4-2 -  Electromagnetic compatibility (EMC) - EN 61000-4-2 -
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
IEC 61000-4-3 -  Electromagnetic compatibility (EMC) - EN 61000-4-3 -
Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency,
electromagnetic field immunity test
IEC 61000-4-4 -  Electromagnetic compatibility (EMC) - EN 61000-4-4 -
Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 -  Electromagnetic compatibility (EMC) - EN 61000-4-5 -
Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61000-4-6 -  Electromagnetic compatibility (EMC) - EN 61000-4-6 -
Part 4-6: Testing and measurement
techniques - Immunity to conducted
disturbances, induced by radio-frequency
fields
IEC 61000-4-8 -  Electromagnetic compatibility (EMC) - EN 61000-4-8 -
Part 4-8: Testing and measurement
techniques - Power frequency magnetic
field immunity test
IEC 61000-4-9 -  Electromagnetic compatibility (EMC) - EN 61000-4-9 -
Part 4-9: Testing and measurement
techniques - Pulse magnetic field immunity
test
IEC 61000-6-2 2005 Electromagnetic compatibility (EMC) - EN 61000-6-2 2005
Part 6-2: Generic standards - Immunity for
industrial environments
IEC 61850-7-2 -  Communication networks and systems for EN 61850-7-2 -
power utility automation -
Part 7-2: Basic information and
communication structure - Abstract
communication service interface (ACSI)
IEC 60255-27 2013 Measuring relays and protection EN 60255-27 2014
equipment -
Part 27: Product safety requirements
Publication Year Title EN/HD Year

IEC 61000-4-13 -  Electromagnetic compatibility (EMC) - EN 61000-4-13 -
Part 4-13: Testing and measurement
techniques - Harmonics and
interharmonics including mains signaling at
a.c. power port, low frequency immunity
tests
IEC 61000-4-29 -  Electromagnetic compatibility (EMC) - EN 61000-4-29 -
Part 4-29: Testing and measurement
techniques - Voltage dips, short
interruptions and voltage variations on d.c.
input power port immunity tests

IEC 62689-1 ®
Edition 1.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Current and voltage sensors or detectors, to be used for fault passage

indication purposes –
Part 1: General principles and requirements

Capteurs ou détecteurs de courant et de tension, à utiliser pour indiquer le

passage d'un courant de défaut –

Partie 1: Exigences et principes généraux

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-3361-0

– 2 – IEC 62689-1:2016 © IEC 2016
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 11
2 Normative references. 11
3 Terms, definitions, abbreviations and symbols . 13
3.1 General terms and definitions . 14
3.2 Terms and definitions related to neutral point treatment . 18
3.3 Terms and definitions related to dielectrics ratings . 19
3.4 Terms and definitions related to current ratings . 21
3.5 Terms and definitions related to other ratings . 21
3.6 Abbreviations and symbols . 21
4 Choice of FPI requirements according to network and fault type . 22
5 Overview of applications . 22
5.1 General description . 22
5.2 Application with regard to installation type . 24
5.2.1 Overhead line applications . 24
5.2.2 Underground cable application . 24
5.3 Application with regard to fault detection capability . 24
5.3.1 Single phase application . 24
5.3.2 Three-phase application . 24
5.3.3 Residual current application . 25
5.3.4 Three-phase and residual current application . 25
6 Application with regard to network configuration and operation . 25
7 FPI’s/DSU’s main elements . 25
7.1 General . 25
7.2 Current and voltage sensors . 25
7.2.1 General . 25
7.2.2 Accuracy for current (and voltage) sensors . 26
7.3 Transmission of signals between sensors and CPIU . 26
7.4 Conditioning, processing and indicating unit (CPIU) . 26
7.5 Human–Machine Interface (HMI) . 26
7.5.1 General . 26
7.5.2 Local display . 27
7.5.3 Remote display . 27
8 FPI/DSU classification and usage classes (data model and profile definition,
testing) . 27
8.1 General . 27
8.2 Integration of FPIs in the electrical grid . 28
8.2.1 FPI for local indication of fault detection . 28
8.2.2 FPIs for remote indication of fault detection . 29
8.2.3 DSUs fully integrated in network operation system (SCADA) . 29
8.3 Information from FPIs/DSUs . 29
8.3.1 General . 29
8.3.2 Information from FPIs for local indication of fault detection . 30
8.3.3 Information from FPIs for remote indication of fault detection . 30

IEC 62689-1:2016 © IEC 2016 – 3 –
8.3.4 Information from DSUs fully integrated in network operation system
(SCADA) . 31
8.4 FPI/DSU classification through performance/capabilities classes . 32
8.4.1 General . 32
8.4.2 Fault detection capability class . 34
8.4.3 Communication capability class . 34
8.4.4 Power supply class . 35
8.4.5 FPI/DSU additional optional feature classes not strictly related to pure
fault detection . 35
8.4.6 Complete FPI/DSU classification through performance/capability
classes . 36
9 Service conditions . 41
9.1 General . 41
9.2 Normal service conditions . 41
9.2.1 Auxiliary power supply . 41
9.2.2 Ambient air temperature . 41
9.2.3 Altitude . 42
9.2.4 Vibrations or earth tremors . 42
9.2.5 Other service conditions for indoor FPI/DSU . 42
9.2.6 Other service conditions for outdoor FPI/DSUs . 42
9.3 Special service conditions . 43
9.3.1 General . 43
9.3.2 Altitude . 43
9.3.3 Vibration or earthquakes . 43
10 Ratings . 43
10.1 General . 43
10.2 Rated primary voltage . 44
10.3 Standard values of rated voltage factor . 44
10.3.1 Earthed electronic voltage transformers . 44
10.3.2 Unearthed electronic voltage transformers . 44
10.4 Highest insulation levels for FPI primary terminals . 44
10.4.1 General . 44
10.4.2 Other requirements for FPI/DSU primary terminals insulation . 46
10.4.3 Insulation requirements for low voltage components (terminals of
secondary voltage sensors) . 46
10.5 Rated frequency range . 48
10.6 Rated primary current . 48
10.7 Rated short-time thermal current . 48
10.8 Rated dynamic current . 48
10.9 Rated supply voltage of auxiliary and control circuits . 48
10.10 Rated supply frequency of auxiliary circuits . 49
11 Design and construction . 49
11.1 General . 49
11.2 Requirement for insulation material in equipment . 49
11.3 Requirements for temperature rise of sensor parts and components . 49
11.3.1 General . 49
11.3.2 Influence of altitude on temperature-rise . 50
11.4 Earthing of equipment . 51
11.4.1 General . 51

– 4 – IEC 62689-1:2016 © IEC 2016
11.4.2 Electrical continuity . 51
11.5 Maximum mass for clip on installation . 51
11.6 Marking and additional information . 52
11.6.1 Rating plate markings . 52
11.6.2 Terminal markings . 52
11.7 Degree of protection by enclosures . 53
11.7.1 General . 53
11.7.2 Protection of persons against access to hazardous parts and protection
of the equipment against ingress of solid foreign objects . 53
11.7.3 Protection against ingress of water . 53
11.7.4 Recommended IP degrees: indoor installation . 54
11.7.5 Recommended IP degrees: outdoor installation . 54
11.7.6 Protection of equipment against mechanical impact under normal
service conditions . 54
11.8 Creepage distances . 54
11.8.1 Pollution . 54
11.8.2 Corrections . 55
11.9 Flammability . 55
11.10 Environmental compatibility . 55
11.10.1 General . 55
11.10.2 Requirements for electromagnetic compatibility (EMC) . 56
11.10.3 Requirements for climatic immunity . 58
11.10.4 Mechanical requirements . 59
11.11 Mechanical stresses on terminals (optional) . 59
12 Tests . 59
12.1 General . 59
12.1.1 Classification of tests . 59
12.1.2 List of tests . 60
12.2 Type tests . 60
12.2.1 General provisions for type tests . 60
12.2.2 Information for identification of specimen . 61
12.2.3 Information to be included in type test reports . 61
12.2.4 Short time current test . 62
12.2.5 Power-frequency voltage withstand tests on primary terminals . 62
12.2.6 Temperature-rise test . 63
12.2.7 Lightning impulse voltage test on primary terminals . 63
12.2.8 Wet test for outdoor type transformers . 64
12.2.9 Low-voltage component voltage withstand test . 64
12.2.10 Electromagnetic Compatibility (EMC) tests. . 64
12.2.11 Partial discharge test on primary terminals . 65
12.2.12 Verification of markings . 66
12.2.13 Verification of the degree of protection by enclosures . 66
12.2.14 Functional tests . 66
12.2.15 Climatic tests . 66
12.2.16 Mechanical tests . 67
12.3 Routine tests . 67
12.3.1 General . 67
12.3.2 Power-frequency voltage withstand test for primary terminals . 67
12.3.3 Power-frequency voltage withstand test for low-voltage components . 67

IEC 62689-1:2016 © IEC 2016 – 5 –
12.3.4 Partial discharge test on primary terminals . 67
12.3.5 Functional tests . 67
12.3.6 Verification of markings . 67
12.4 Special tests . 67
12.4.1 General . 67
12.4.2 Chopped impulse voltage withstand test on primary terminals . 67
12.4.3 Fire hazard test . 68
12.4.4 Ageing test . 68
12.4.5 Mechanical stresses on terminals test . 68
Annex A (informative) Example of guide for the selection of equipment according to
use – information to be provided with inquiries, tenders, and orders . 69
Annex B (informative) Examples of possible FPI/DSU architectures . 70
Annex C (informative) Examples of FPI/DSU regarding communication capabilities . 75
Bibliography . 83

Figure 1 – General architecture of an FPI . 10
Figure 2 – Possible architecture of a typical FPI . 22
Figure 3 – Possible detailed architecture of a DSU in a wide extended configuration . 23
Figure 4 – Example of possible coexistence of different performance level FPIs/DSUs
on the same MV feeder . 28
Figure 5 – Example of possible ports to consider concerning insulation requirements
for LV components . 47
Figure 6 – Altitude correction factor for the temperature rise . 51
Figure B.1 – Example of a F5NC(or C) – T2 – P3 – 3 class FPI for underground cable
application . 70
Figure B.2 – Example of a F3NC(or C) – T1 – P2 – max 2 class FPI for underground
cable application . 71
Figure B.3 – Example of an F6NC –T4 – P3 – 4 class DSU for underground cable
application . 72
Figure B.4 – Example of an F6NC –T4 – P3 – 4 class DSU for underground cable
application . 73
Figure B.5 – Example of a F5C(or NC) – T2 – P4 – 3 class FPI for underground cable
application . 74
Figure C.1 – Example of an F1 (F2/F3) C (NC) – T2 – P2 – 1 (2) class FPI for outdoor
installation on overhead conductors . 75
Figure C.2 – Examples of an F4 (F5/F6) C (NC) – T2 – P3 (P4) – 3 (4) class DSU for
underground cable application . 77
Figure C.3 – Examples of an F4 (F5/F6) C (NC) – T2 – P3 (P4) – 4 class DSU for
underground cable application . 79
Figure C.4 – Examples of a F4 (F5/F6) C (NC) – T3 (T4) – P3 (P4) – 3(4) class DSU
for underground cable application . 82

Table 1 – FPI/DSU classification principles through classes to be used for data model
and profile definitions and testing . 33
Table 2 – FPI fault detection capability classes to be used for data model and profile
definition and testing . 34
Table 3 – Communication capability to be used for data model and profile definition
and testing . 35
Table 4 – Power supply class . 35

– 6 – IEC 62689-1:2016 © IEC 2016
Table 5 – Additional optional feature classes (not strictly related to pure fault
detection) . 35
Table 6 – FPIs usage classes: fault detection capabilities and communication
capabilities . 37
Table 7 – FPI/DSU minimum and maximum temperatures . 41
Table 8 – Standard values of rated voltage factor (k ) . 44
u
Table 9 – Rated insulation levels . 45
Table 10 – Partial discharge test voltages and permissible levels . 46
Table 11 – Rated values of auxiliary supply voltage – d.c. voltage . 48
Table 12 – Rated values of auxiliary supply voltage – a.c. voltage . 49
Table 13 – Limits of temperature rise for various parts, materials and dielectrics of
sensors . 50
Table 14 – Unified specific creepage distance (USCD) . 55
Table 15 – Fire hazard of electrotechnical products . 55
Table 16 – Electromagnetic immunity requirements . 56
Table 17 – Climatic immunity requirements . 58
Table 18 – Mechanical immunity requirements. 59
Table 19 – List of tests . 60
Table 20 – EMC test . 64
Table 21 – Climatic tests . 66
Table 22 – Mechanical tests . 67

IEC 62689-1:2016 © IEC 2016 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CURRENT AND VOLTAGE SENSORS OR DETECTORS,
TO BE USED FOR FAULT PASSAGE INDICATION PURPOSES –

Part 1: General principles and requirements

FOREWORD
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International Standard IEC 62689-1 has been prepared by IEC technical committee 38:
Instrument transformers.
The text of this standard is based on the following documents:
FDIS Report on voting
38/503/FDIS 38/510/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 8 – IEC 62689-1:2016 © IEC 2016
A list of all the parts in the IEC 62689 series, under the general title Current and voltage
sensors or detectors, to be used for fault passage indication purposes, can be found on the
IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
IEC 62689-1:2016 © IEC 2016 – 9 –
INTRODUCTION
0.1 General
The IEC 62689 series is a product family standard for current and voltage sensors or
detectors, to be used for fault passage indication purposes by suitable devices or functions,
indicated as fault passage indicator (FPI) or distribution substation unit (DSU), depending on
their performances.
Different names are used to indicate FPIs depending on the region of the world and on their
functionalities concerning capability to detect different kinds of faults, for instance:
• fault detector;
• smart sensor;
• faulted circuit indicator (FCI);
• short circuit indicator (SCI);
• earth fault indicator (EFI);
• test point mounted FCI.
• combination of the above.
Simpler versions, using only local information/signals and/or local communication, are called
FPI, while very evolved versions are called DSU. The latter are explicitly designed for smart
grids and based on IEC 60870-5 and IEC 61850 communication protocols. Compared to
instrument transformers, digital communication technology is subject to on-going changes
which are expected to continue in the future.
Profound experience with deep integration between electronics and instrument transformers
has yet to be gathered on a broader basis, as this type of equipment is not yet widespread in
the industry.
DSUs, besides FPI basic functions, may also optionally integrate additional auxiliary functions
such as:
• voltage presence/absence detection for medium voltage (MV) network automation, with
and without distributed energy resources presence (not for fault confirmation, which can
be a basic FPI function depending on the adopted fault detection method, neither for
safety-related aspects, which are covered by IEC 61243-5);
• measuring of voltage, current, and active and reactive power, etc., for various
applications, such as MV network automation, monitoring of power flows, etc.;
• smart grid management (such as voltage control and unwanted island operation) by
means of a proper interface with local distributed generators (DER);
• local output of collected information by means of suitable interfaces;
• remote transmis
...