BS EN IEC 61557-3:2022 – TC:2023 Edition

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Tracked Changes. Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC. Equipment for testing, measuring or monitoring of protective measures – Loop impedance

Published By	Publication Date	Number of Pages
BSI	2023	39

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Categories: 29.240.01 - Power transmission and distribution networks in general, BSI

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Annex ZA (normative)Normative references to international publicationswith their corresponding European publications

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English
CONTENTS

FOREWORD

1 Scope
2 Normative references
3 Terms and definitions

4 Requirements
4.1 General
4.2 Measurement of loop impedance
4.3 External resistance

4.4 Fault voltage exceeding UL
5 Marking and operating instructions
5.1 Marking
5.2 Operating instructions

6 Tests
6.1 General
6.2 Operating uncertainty

Table 1 – Calculation of operating uncertainty

6.3 External resistance
6.4 Fault voltage
6.5 Overvoltage

Bibliography

Status	Definitive
Pages	39
Publication Date	2023-10-17
ISBN	978 0 539 24119 8
Standard Number	BS EN IEC 61557-3:2022 – TC
Title	Tracked Changes. Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC. Equipment for testing, measuring or monitoring of protective measures – Loop impedance
Descriptors	Type testing, Instructions for use, Marking, Electric load, Electrical testing, Impedance measurement, Low-voltage equipment, Low voltage, Safety devices, Electrical safety, Electrical protection equipment, Electrical measuring instruments
Publisher	BSI
Committee	PEL/85
ICS Codes	29.240.01 - Power transmission and distribution networks in general


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BS EN IEC 61557-3:2022 – TC:2023 Edition

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