3.8.1 thermostat : temperature-sensing device, the operating temperature of which may be either fixed
or adjustable; and which, during normal operation, keeps the temperature of the controlled part between
certain limits by automatically opening and closing a circuit
3.8.2 temperature limiter : temperature-sensing device, the operating temperature of which may be
either fixed or adjustable, and which, during normal operation, operates by opening or closing a circuit
when the temperature of the controlled part reaches a predetermined value. It does not make the
reverse operation during the normal duty cycle of the tool
3.8.3 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 which is so constructed that its
setting cannot be altered by the user
3.8.4 self-resetting thermal cut-out : thermal cut-out which automatically restores the current after the
relevant part of the tool has cooled down to a given value
3.8.5 non-self-resetting thermal cut-out : thermal cut-out which requires a manual operation for
resetting, or replacement of a part, in order to restore the current
3.8.6 protective device : device the operation of which prevents a hazardous situation under abnormal
operation conditions
3.8.7 thermal link : thermal cut-out which operates only once, and then requires partial or complete
replacement
3.9.1 all-pole disconnection disconnection of all supply conductors except the protective earthing
(grounding) conductor by a single initiating action
3.9.2 accessible part : part which can be touched by means of the standard test finger in Figure 1,
including, for accessible metal parts, any metal part connected to it
3.9.3 live part : any conductor or conductive part intended to be energized in normal use, including a
neutral conductor but, by convention, not a PEN conductor
3.10.1 electronic component : part in which conduction is achieved principally by electrons moving
through a vacuum, gas or semiconductor, with the exclusion of neon indicators
3.10.2 electronic circuit : circuit incorporating at least one electronic component
3.10.3 protective impedance : impedance connected between live parts and accessible conductive
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