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. The thermostat itself does not control the temperature, the thermostat senses the temperature and controls the temperature by switching…
detachable power supply part: part of the appliance the output of which is intended to be detachable from the class III construction part of the appliance.Note 1 to entry: Means of detachment are a flexible cord and connector or an appliance outlet fitted to the detachable power supply part. This actually defines a detachable adapter….
(IEC 60335-1 Ed. 5.1) battery-operated appliance: appliance deriving its energy from batteries enabling the appliance to perform its intended function without a mains connection.(IEC 60335-1 Ed. 6)battery-operated appliance: appliance deriving its energy from batteries enabling the appliance to perform its intended function without a supply connectionNote 1 to entry: A battery-operated appliance can have a…
functional insulation as well as other insulation exists on circuit boards. Typically, the surface environment of a circuit board is determined to be either Pollution degree 3 or pollution degree 2.If the circuit board is mounted in an electrical box and sealed with a solid sealant, the sealing will look as follows: What should be…
small part: part, where each surface lies completely within a circle of 15 mm diameter, or a part where some of the surface lies outside a 15 mm diameter circle but in such a way that it is not possible to fit a circle of 8 mm diameter on any of the surfaces.NOTE A part…
tool: screwdriver, coin or any other object that may be used to operate a screw or similar fixing means. I’d like to explain the intent of the standard, which defines a separate tool, in order to distinguish between operations that use a tool and those that do not. For example, if a tool is used…
accessible part: part or surface that can be touched by means of test probe B of IEC 61032, and if the part or surface is metal, any conductive part connected to it.NOTE Accessible non-metallic parts with conductive coatings are considered to be accessible metal parts. There are some parts or surfaces in the appliance that…
We are discussing here the second structure of the PTC heating element, PTC heating element structure please refer to the explanation of its definition. How is the creepage distance of the functional insulation at the location of the red circle in Figure 1 determined? We all know that NOTE 1 of TABLE 18 section has…
PTC heating element: element intended for heating consisting mainly of positive temperature coefficient resistors that are thermally sensitive and have a rapid non-linear increase in resistance when the temperature is raised through a particular range. As the temperature increases, the resistance of the heating element of the PTC heating element increases. The relationship between temperature…
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