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BS EN IEC 61557-3:2022

BS EN IEC 61557-3:2022

$102.76

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 – Part 3. Loop impedance

Published By Publication Date Number of Pages
BSI 2022 18
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PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 Blank Page
7 English
CONTENTS
8 FOREWORD
10 1 Scope
2 Normative references
3 Terms and definitions
11 4 Requirements
4.1 General
4.2 Measurement of loop impedance
4.3 External resistance
12 4.4 Fault voltage exceeding UL
5 Marking and operating instructions
5.1 Marking
5.2 Operating instructions
13 6 Tests
6.1 General
6.2 Operating uncertainty
14 Table 1 – Calculation of operating uncertainty
15 6.3 External resistance
6.4 Fault voltage
6.5 Overvoltage
16 Bibliography

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BS EN IEC 61557-3:2022
$102.76