Fuji Electric FRENIC-Ace series - Zero-Phase Reactors for Reducing Radio Noise (Acls)

11.14 Zero-phase Reactors for Reducing Radio Noise (ACLs)
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11.14 Zero-phase Reactors for Reducing Radio Noise (ACLs)
An ACL is used to reduce radio frequency noise emitted from the inverter output lines. Pass the total of four
wires--three inverter output wires and a grounding wire through the ACL in the same passing direction four times. If
shielded wires are used, pass them through the ACL with their shields four times. Be sure to use wires with a heat
resistance of 75°C (167°F) or above.
The ACL absorbs high-frequency noise components and emits them as heat into the air so that the amount of heat
generation can be large. If it happens, lower the carrier frequency, upgrade the heat-resistance rank of wires,
increase the number of the ACLs to decrease the number of turns per ACL, replace the ACLs with higher type ones,
or take any other measures.
The wire size is determined depending upon the ACL size (I.D.) and installation requirements. Refer to Table
11.14-1.
Figure 11.14-1 Dimensions of Zero-phase Reactor for Reducing Radio Noise (ACL) and Connection Example
Table 11.14-1 Zero-phase Reactors for Reducing Radio Noise (ACL)
ACL type
Installation requirements
Wire size
(mm
2
)
Wire size
(AWG)
Q’ty Number of turns
ACL-40B
1 4 5.5 or below 10 or below
2 2 14 or below 6 or below
4 1 38 or below 1 or below
ACL-74B
1 4 14 or below 6 or below
2 2 60 or below 1/0 or below
4 1 250 or below 500 or below