supply leads: set of wires intended for connecting the appliance to fixed wiring and accommodated in acompartment within or attached to the appliance There are two restrictions that need to be emphasized here. The first is that it must be contained in a compartment, which can generally be a plastic electrical box, or a recessed…
When we fill a TRF in word format, we often need to insert some special symbols or text, such as the Celsius symbol, plus and minus symbols, P, N/A, your name, the current date, insert your signature picture, insert the picture of the product and so on.I use .net to write a add-in program for…
If you need to fill out a TRF (test report form) of the IEC 60335 series standard, I guess you will definitely feel that the TRF has too many pages. How to quickly locate the cursor to a certain position in the report? You may use the find function (ctrl+F), or use the mouse wheel,…
remote operation: control of an appliance by a command that can be initiated out of sight of the appliance using means such as telecommunications, sound controls or bus systems.NOTE An infra-red control by itself is not considered one used for remote operation. However, it may be incorporated as part of a system such as a…
dangerous malfunction: unintended operation of the appliance that may impair safety. The equipment itself does not operate as specified and may endanger safety. Such as fans, the starting capacitor of the internal AC asynchronous motor has failed in the form of a short circuit or an open circuit; in the case of air-conditioners, the outlet…
rated impulse voltage: voltage derived from the rated voltage and the overvoltage category of the appliance, characterizing the specified withstand capability of its insulation against transient overvoltages. For beginners, it is not really necessary to understand the physical meaning of this definition. The main use of this voltage value in the standard is to determine…
normal operation: conditions under which the appliance is operated in normal use when it is connected to the supply mains. normal operation is the state of working in the way specified in the instruction manual usually. Sometimes it is also the state of working in the way specified in the standard, although this mode of…
If there are ambiguities in our understanding of the standards, or if there are no clear requirements in the standards, or if we are unsure of the strength of the standards’ implementation, at first, we can by checking the following webpage to see if there is a decision that we can refer to for the…
There are 7 rated item from clause 3.1.1 to clause 3.1.8 except for clause 3.1.3, such as rated voltage, rated voltage range, rated power input, rated power input range, rated current, rated frequency, rated frequency range. To summarize the intent of the standard, “rated” represents a set of parameters assigned to the appliance by the…
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