BS 5424-3:1988

This standard BS 5424-3:1988 Specification for controlgear for voltages up to and including 1000 V a.c. and 1200 V d.c. is classified in these ICS categories:

• 29.130.20 Low voltage switchgear and controlgear

First paragraph

Replacement:

This standard applies to electro-magnetic air-break contactors in accordance with IEC Publication 158-1 for which additional requirements are necessary in order to specify in sufficient detail certain testing parameters and procedures.

Additional notes:

1. — The need for additional requirements appears, for example, when contactors have to be tested and certified by appropriate testing authorities because of national or other laws or rules.

2. — If control switches are incorporated in contactors they shall comply with I EC Publication 337-1: Control Switches (Low-voltage Switching Devices for Control and Auxiliary Circuits, Including Contactor Relays), Part 1: General Requirements.