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8.5 Installing Peripheral Devices
450
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
◆
Installing a Magnetic Contactor at the Power Supply Side
Install a magnetic contactor to the drive input for the purposes explained below.
■
Disconnecting the Power Supply
The drive should be shut off with a magnetic contactor (MC) when a fault occurs in any external equipment such as
braking resistors.
NOTICE:
Do not connect electromagnetic switches or magnetic contactors to the output motor circuits without proper sequencing.
Improper sequencing of output motor circuits could result in damage to the drive.
NOTICE:
Install a MC on the input side of the drive when the drive should not automatically restart after power loss. To get the full
performance life out of the electrolytic capacitors and circuit relays, refrain from switching the drive power supply off and on more than
once every 30 minutes. Frequent use can damage the drive. Use the drive to stop and start the motor.
NOTICE:
Use a magnetic contactor (MC) to ensure that power to the drive can be completely shut off when necessary. The MC should
be wired so that it opens when a fault output terminal is triggered.
Note: 1.
To keep the drive from restarting automatically when power is restored after momentary power loss, install a magnetic contactor to
the drive input.
2.
To have the drive continue operating through momentary power loss, set up a delay for the magnetic contactor so that it does not open
prematurely.
◆
Connecting a Surge Absorber
A surge absorber 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 absorber or diode when operating
with an inductive load.
Note:
Never connect a surge absorber to the drive output.
◆
Reducing Noise
■
Preventing Induced Noise
Use shielded cables and internal EMC-filter models or zero phase reactors to prevent induced noise. Lay the cables at
least 30 cm away from the signal line to prevent induced noise.
Figure 8.18
Figure 8.20 Preventing Induced Noise
■
Reducing Noise Using Internal EMC-Filter Models
Internal EMC filters are built-in to drive models CIMR-U
E
/
W
. These drives comply with EMC
guidelines IEC/EN 61800-3 2nd Environment Category C2. Use switches on the drive to enable the EMC filters.
Enable the Internal EMC Filter on page 119
.
A – Power supply
E – Separate at least 30 cm
B – Drive
F – Controller
C – Shielded motor cable
G – Signal line
D – Motor
B
A
C
F
G
E
R/L1
MCCB
S/L2
T/L3
U/T1
V/T2
W/T3
D
M
SIEP_C710636_02B_1_0.book 450 ページ 2015年11月25日 水曜日 午後4時56分