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BS EN IEC 61557-11:2022

BS EN IEC 61557-11:2022

$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 – Effectiveness of residual current monitors (RCM) in TT, TN and IT systems

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BSI 2022 20
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IEC 61557-11:2009 specifies the requirements for testing equipment applied to the testing of the effectiveness of residual current monitors (RCMs) of type A and type B, which are already installed in distribution systems. This test equipment can be used in any kind of network like a TN, TT or IT system. The test equipment may also be used for testing directionally discriminating RCMs in IT-Systems.This part is to be used in conjunction with IEC 61557-1:2007, Part 1: General requirements.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
8 FOREWORD
10 1 Scope
2 Normative references
3 Terms and definitions
12 4 Requirements
4.1 General
4.2 Functions
4.2.1 Operating test
13 Figure 1 – Maximum step size of increasing smooth direct test current (IT)
14 Figure 2 – Maximum gradient of linearly increasing smooth direct test current (IT)
Figure 3 – Example for linearly increasing smooth direct test current (IT): I∆n = 30 mA
15 4.2.2 Non-operating test
4.2.3 Test of actuating time
4.3 Fault voltages exceeding UL
4.4 Overvoltage
16 5 Marking and operating instructions
5.1 Markings
5.2 Operating instructions
5.2.1 General
5.2.2 Information
5.2.3 Warnings
6 Tests
6.1 General
17 6.2 Operating uncertainty
18 6.3 Test of protection against high fault voltages
6.4 Test of overvoltage
Table 1 – Calculation of operating uncertainty
19 Bibliography

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BS EN IEC 61557-11:2022
$102.76