Clause 3 – How to understand the definition of “type X attachment”

type X attachment: method of attachment of the supply cord such that it can easily be replacedNote 1 to entry: The supply cord may be specially prepared and only available from the manufacturer or its service agent. A specially prepared cord may include a part of the appliance. First, this definition is for the supply…

Clause 3 – How to understand the definition of “supply cord”

supply cord: flexible cord, for supply purposes, that is fixed to the appliance Generally speaking, most countries have their own mandatory safety and performance testing standards for supply cord. The supply cord here is a certified supply cord relative to the supply leads in clause 3.2.1. In most countries, the maximum current that the plug…

Clause 3 – How to understand the definition of “interconnection cord”

interconnection cord: external flexible cord between two parts of an appliance, provided as part of a complete appliance for purposes other than connection to the supply mainsNote 1 to entry: In battery-operated appliances, if the battery is placed in a separate box, the flexible lead or flexible cord connecting the box with the appliance is…

Clause 3 – How to understand the definition of “supply leads”

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…

A tools for fill TRF – Inserting commonly used symbols and text messages

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…

Clause 3 – How to understand the definition of “remote operation”

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…

Clause 3 – How to understand the definition of “dangerous malfunction”

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…

Clause 3 – How to understand the definition of “rated impulse voltage”

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…