Greenlee PDMM-10 Manual De Instrucciones página 13

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PDMM-10
Overvoltage Installation Categories
These definitions were derived from the international safety
standard for insulation coordination as it applies to measurement,
control, and laboratory equipment. These overvoltage categories
are explained in more detail by the International Electrotechnical
Commission; refer to either of their publications: IEC 1010-1 or
IEC 60664.
Overvoltage Category I
Signal level. Electronic and telecommunication equipment, or parts
thereof. Some examples include transient-protected electronic
circuits inside photocopiers and modems.
Overvoltage Category II
Local level. Appliances, portable equipment, and the circuits they
are plugged into. Some examples include light fixtures, televisions,
and long branch circuits.
Overvoltage Category III
Distribution level. Permanently installed machines and the circuits
they are hard-wired to. Some examples include conveyor systems
and the main circuit breaker panels of a building's electrical
system.
Overvoltage Category IV
Primary supply level. Overhead lines and other cable systems.
Some examples include cables, meters, transformers, and other
exterior equipment owned by the power utility.
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