IEC 60947-4-3:2020

Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads

IEC 60947-4-3:2020(E) applies to semiconductor controllers and semiconductor contactors for non-motor load intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC.
It covers their use:
– for operations of changing the state of AC electric circuits between the ON-state and the OFF-state;
– with or without bypass switching devices;
– as controller, for reducing the amplitude of the RMS AC voltage.
This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) scope exclusions;
b) editorial correction of notes and hanging paragraphs;
c) safety aspects related to:
- general aspects;
- limited energy circuits;
- electronic circuits;
d) mention of dedicated wiring accessories;
e) power consumption measurement;
f) alignment to IEC 60947-1:2020;
g) alignment with IEC 60947-4-2 when appropriate.

General Information

• Status: Published
• Publication Date: 13-Jul-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• ICS: 31.180 - Printed circuits and boards
• Technical Committee: SC 121A - Low-voltage switchgear and controlgear
• Current Stage: PPUB - Publication issued
• Start Date: 24-Jul-2020
• Completion Date: 14-Jul-2020

Relations

• Revises: IEC 60947-4-3:2014 - Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - AC semiconductor controllers and contactors for non-motor loads
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60947-4-3
®


Edition 3.0 2020-07
INTERNATIONAL
STANDARD



Low-voltage switchgear and controlgear –
Part 4-3: Contactors and motor-starters – Semiconductor controllers and
semiconductor contactors for non-motor loads
IEC 60947-4-3:2020-07(en)

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IEC 60947-4-3

®


Edition 3.0 2020-07




INTERNATIONAL



STANDARD



















Low-voltage switchgear and controlgear –

Part 4-3: Contactors and motor-starters – Semiconductor controllers and

semiconductor contactors for non-motor loads

























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 29.130.20; 31.180 ISBN 978-2-8322-8550-3




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– 2 – IEC 60947-4-3:2020 © IEC 2020
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 11
3 Terms, definitions, symbols and abbreviated terms . 11
3.1 General . 11
3.2 Alphabetical index of terms . 12
3.3 Terms and definitions concerning the types of semiconductor controllers and
semiconductor contactors (see Figure 1). 12
3.4 Terms and definitions concerning characteristics of semiconductor
controllers and semiconductor contactors . 13
3.5 Terms and definitions concerning safety aspects . 16
3.6 Symbols and abbreviated terms .
...