11.5 Arresters
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11.5 Arresters
An arrester suppresses surge currents induced by lightning invaded from the power supply lines. Use of the
grounding wire that is used commonly for electric equipment in the panel, combined with the arrester, is effective in
preventing electronic equipment from damage or malfunctioning caused by such surges.
Applicable arrester models are CN5132 for three-phase 200V class series, and CN5134 for three-phase 400V
class series. (CN523 series with 20 kA of discharging capability is also available.) Figure 11.5-1 shows their
external dimensions and connection examples. Refer to the catalog “Fuji Surge Killers/Absorbers (HS165a:
Japanese edition only)” for details. These products are available from Fuji Electric Technica Co., Ltd.
Figure 11.5-1 Arrester Dimensions and Connection Examples
: The models with a built-in arrestor separator (CN5212-FK and
CN5232-FK) are not required when the short-circuit current of
the circuit is 250 VAC, 10kA or less.
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