여기서 강조점은 이중 절연 또는 강화 절연 요구 사항을 충족할 수 있는 기기 구조의 일부입니다. 따라서 클래스 I 기기에는 클래스 II 구성도 포함됩니다. 예: 아래 그림의 오븐은 금속 쉘과 플라스틱 스위치 손잡이를 사용합니다. 사용자가 스위치 손잡이를 만졌을 때 손잡이는 절연재질로 되어 있어 접지가 되지 않습니다. 감전 방지는 손잡이 자체의 절연에만 의존할 수 있습니다. 스위치 내부의 충전부와 스위치 손잡이 축 사이에는 기초절연이 있고, 스위치 손잡이는 부가절연을 이루고 있습니다. 따라서 스위치 손잡이 위치는 2종 구조입니다.
intentionally weak part: A part intended to rupture under abnormal operating conditions to prevent the occurrence of a condition that could impair compliance with this standard.NOTE: Such a part may be a replaceable component, such as a resistor or capacitor, or a part of a component to be replaced, such as an inaccessible thermal link…
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…
live part: conductor or conductive part intended to be energized in normal use, including a neutral conductor but, by convention, not a PEN conductorNOTE 1 Parts, accessible or not, complying with 8.1.4 are not considered to be live parts.NOTE 2 A PEN conductor is a protective earthed neutral conductor combining the functions of both a…
non-detachable-part: part that can only be removed or opened with the aid of a tool or a part that fulfils the test of 22.11. The definition of this concept is mainly for the judgment of clause 8 and clause 20, and the judgment of other clauses may also be used. On the appliance, whether any…
8.1.5 Live parts of built-in appliances, fixed appliances, and appliances delivered in separate units shall be protected by at least basic insulation before installation or assembly. Compliance is checked by inspection and the test in 8.1.1.Why is this requirement in place? I believe there are three types of hazards that require protection. The first is…
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…
