Arresters - Fuji Electric FRENIC-HVAC User Manual

4.3.3

Arresters

An arrester suppresses surge currents induced by lightning invaded from the power supply lines.
Common use of the grounding wire for electronic equipment in the panel and the arrester is effective
in preventing electronic equipment from damage or malfunctioning caused by such surges. Arresters
cannot be used with the 575V class series.
Applicable arrester models are CN5132 for three-phase 230V class series, and CN5134 for
three-phase 460V class series. (CN523 series with 20 kA of discharging capability is also available.)
Figure 4.4 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.
Three-phase (230/460 VAC)
Master
Arrester
separator *2
(N-phase terminal is only for CN5234 and CN5234-K.)
Figure 4.4 Arrester Dimensions and Connection Examples
Inverter
Motor
Plug fuse or
MCCB
Available from Fuji Electric Technica Co., Ltd.
4-11
4.3 Peripheral Equipment
Keep the wiring length as short as possible.
*1
*2 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, 10 kA or less.