Prevent Switching Surge; Decrease Noise; Connect A Noise Filter To The Input Side (Primary Side) - YASKAWA CIPR-CR70A Series Technical Manual

A - Power supply
B - MCCB
Connect a DC Reactor
When you install a DC link choke, remove the jumper between terminals +1 and +2. If you will not use a DC link
choke, do not remove the jumper. Refer to Figure 2.139 for an example of how to wire the DC reactor.
A - Power supply
B - MCCB
◆

Prevent Switching Surge

■
Connect a Surge Protective Device
A surge protective device decreases the surge voltage that is generated from switching an inductive load near the
drive. Inductive loads include:
• Magnetic contactors
• Electromagnetic relays
• Magnetic valves
• Solenoids
• Magnetic brakes.
Always use a surge protective device or diode with inductive loads.
Note:
Do not connect a surge protective device to the drive output side.
◆

Decrease Noise

Note:
The main circuit terminal block for the drive and the terminal block for the noise filter come in different shapes. The drive has a
European-style terminal block and the noise filter has a circular terminal block. Use caution when you prepare the ends of the wires.
■

Connect a Noise Filter to the Input Side (Primary Side)

High-speed switching makes noise in the drive output. This noise flows from the drive to the power supply, and
can possibly have an effect on other equipment. Install a noise filter to the input side of the drive to decrease the
quantity of noise that flows to the power supply. A noise filter also prevents noise from entering the drive from the
power supply.
• Use a noise filter specially designed for drives.
• Install the noise filter as close as possible to the drive.
YASKAWA ELECTRIC SIEP C710617 19A YASKAWA AC Drive CR700 Technical Manual
C - AC reactor
D - Drive
Figure 2.138 AC Reactor Connection Example
C - Drive
D - DC reactor
Figure 2.139 DC Reactor Connection Example
2 Mechanical & Electrical Installation
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