IEC 61557-7 Ed. 3.1 b:2023

Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence CONSOLIDATED EDITION

International Electrotechnical Commission, 08/01/2023

Publisher: IEC

File Format: PDF

$79.00$158.00


Published:01/08/2023

Pages:66

File Size:1 file , 1.8 MB

Note:This product is unavailable in Ukraine, Russia, Belarus

This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be mechanical, visual and/or audible.

This document does not apply to additional measurements for other quantities. It does not apply to monitoring relays.

NOTE Common  three-phase distribution systems are depicted in IEC 610101: 2010, Annex I and
IEC 61010-1:2010/AMD1:2016, Annex I.

More IEC standard pdf

IEC 60489-4 Ed. 2.0 b:1991

IEC 60489-4 Ed. 2.0 b:1991

Methods of measurement for radio equipment used in the mobile services - Part 4: Transmitters employing single-sideband emissions (R3E, H3E or J3E)

$183.00 $367.00

IEC 60512-24-1 Ed. 1.0 b:2010

IEC 60512-24-1 Ed. 1.0 b:2010

Connectors for electronic equipment - Tests and measurements - Part 24-1: Magnetic interference tests - Test 24a: Residual magnetism

$6.00 $13.00

IEC 61629-1 Ed. 1.0 b:1996

IEC 61629-1 Ed. 1.0 b:1996

Aramid pressboard for electrical purposes - Part 1: Definitions, designations and general requirements

$12.00 $25.00

IEC 61020-2 Ed. 1.0 b:1991

IEC 61020-2 Ed. 1.0 b:1991

Electromechanical switches for use in electronic equipment - Part 2: Sectional specification for rotary switches

$33.00 $66.00