Standards Development

Scope

This International Standard establishes general actuating principles for manually operated actuators forming part of the human-machine interface associated with electrical equipment, in order to:

–        increase the safety (e.g. of persons, property, environment) through the safe operationof the equipment;

–        facilitate the proper and timely operation of the actuators.

These principles apply, not only for the operation of electrical equipment, machines,or complete plant under normal conditions, but also under fault or emergency conditions.

This standard is for general application, from simple cases such as single actuators(e.g. push-buttons) to multiple actuators, forming part of a large assembly of electrical andnon-electrical equipment, or part of a central process control station.

This standard establishes correlations between the function of an actuator and its direction of actuating or location in relation to other actuators.

In the absence of particular rules, this standard can also be applied to actuators operated by a part of the human body other than the hand (e.g. to foot-operated devices).

This BASIC SAFETY PUBLICATION focusing on SAFETY essential requirement is primarily intended for use by technical committees in the preparation of SAFETY publications in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51.

One of the responsibilities of a technical committee is, wherever applicable, to make use of basic safety publications in the preparation of its publications.