Chapter 2 specification
2-2
[1] IEC (International Electro technical Commission):
An international nongovernmental organization which promotes internationally cooperated
standardization in electric/electronic fields, publishes international standards and manages applicable
estimation system related with.
[2] Pollution level: An index indicating pollution level of the operating environment which decides
insulation performance of the devices. For instance, Pollution level 2 indicates the state generally that
only non-conductive pollution occurs. However, this state contains temporary conduction due to dew
produced.
Notes
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