7.4 Installing Peripheral Devices
298 YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
Figure 7. 3
Figure 7.3 Connecting a DC Reactor
◆ Connecting a Surge Protector
A surge protector suppresses surge voltage generated from switching an inductive
load near the drive. Inductive loads include magnetic contactors, relays, valves,
solenoids and brakes. Always use a surge protector or diode when operating with
an inductive load.
Note: Never connect a surge protector to the drive output.
◆ Connecting a Noise Filter
■ Input-Side Noise Filter
Drive outputs generate noise as a result of high-speed switching. This noise flows
from inside the drive back toward the power supply, possible affecting other
equipment. Installing a noise filter to the input side of the drive can reduce the
amount of noise flowing back into the power supply. This also prevents noise from
entering the drive from the power supply.
• Use a noise filter specifically designed for AC drives.
• Install the noise filter as close as possible to the drive.
A – Power supply C – Drive
B – MCCB D – DC reactor
A
C
D
R/L1
+1 +2
B
S/L2
T/L3
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