HD 419.3 S1:1988

Low-voltage controlgear - Part 3: Additional requirements for contactors subject to certification HD 419.3 S1:1988

Scope

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