5 SIGNALS AND WIRING
5.1 Example power circuit connections
35
5
■
400 V class
*1 Use the magnetic contactor with an operation delay time (interval between current being applied to the coil until closure of contacts) of
80 ms or less. The bus voltage may drop depending on the main circuit power supply voltage and operation pattern, causing a dynamic
brake deceleration during a forced stop deceleration.
*2 Configure a sequence that shuts off the main circuit power supply when an alarm occurs on a drive unit.
*3 Install an overcurrent protection device (molded-case circuit breaker, fuse, etc.) to protect the branch circuit.
Page 93 Molded-case circuit breakers, fuses, magnetic contactors
*4 For wire size and overcurrent protection device selection, refer to the following.
Page 89 Selection example of wires
L1
L2
L3
1
3
MC1
MC2
L11
L21
L+
L-
MC
SK
MC
*1
CN23
CN4
*3*4
MR-CV_
MCCB
Ready for
operation
off/on
Emergency
stop switch
AC reactor
Protection
coordination
cable
To the drive unit
To the drive unit
3-phase
380 V AC to
480 V AC
50/60 Hz
Drive unit error
*2