all-pole disconnection: disconnection of both supply conductors by a single initiating action or, for multi-phase appliances, disconnection of all supply conductors by a single initiating actionNOTE For multi-phase appliances, the neutral conductor is not considered to be a supply conductor. Single-phase power: An AC power system composed of one live wire and one neutral wire.Three-phase…
electronic circuit: circuit incorporating at least one electronic component. The standard references electronic circuits in clause 19.11, clause 19.11.1, and clause 22.5. These requirements are additional to those for electronic circuits. The standard recognizes that electronic circuits alone cannot provide adequate protection. Electronic circuits may be susceptible to interference and malfunction, or they may be…
thermal-cut-out: device which during abnormal operation limits the temperature of the controlled part by automatically opening the circuit, or by reducing the current, and is constructed so that its setting cannot be altered by the user. There are three key provisions here. First, the thermal cut-out is a heat-sensing element, second, it can only be…
