Safety switches

摘要

According to a first aspect of the present invention there is provided a safety switch arrangement for affecting the operating state of equipment to which the safety switch arrangement is at least indirectly connected, the safety switch comprising: a configuration arranged to change from a first condition to a second condition depending on whether or not an actuator has been engaged with or disengaged from the safety switch; and an electricity generation arrangement for generating electricity and for providing a component of the safety switch with electricity.