Remark
(1) IEC(International Electro technical Commission)
- International private group facilitating international cooperation of electric/electronic standardization,
issuing international standards and operating the compliance evaluation systems.
(2) Pollution degree
- As an index representing the pollution degree of an environment to determine the insulation of a device,
pollution degree 2 generally means the status generating non-conductive contamination. However, it also
contains the status generating temporarily conduction due to condensation.
(3) Definition of Overvoltage Categories
- Equipment of overvoltage category II is energy-consuming equipment to be
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