Omron RX Series - Page 440

7 Detailed Functions
7 - 114
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
Connection and timing diagrams for commercial switching operation
• Make sure that MC3 and MC2 are mechanically interlocked. Not doing so may result in damage to
the inverter.
• If the earth leakage breaker (ELB) trips due to a ground fault, the commercial power supply circuit
does not work as well. If necessary, provide a backup power supply circuit separate from the
commercial circuit.
• If an overcurrent trip occurs during frequency matching, increase the Restart Standby Time (b003).
• For commercial switching operation, refer to the above Connection and timing diagrams for
commercial switching operation.
• For FWY, RVY, and CSY, use low-voltage relays. Use the above timing sequence diagrams for
reference.
• The inverter can be set up to restart automatically at power-on. In this case, the terminal CS is not
required. For details, refer to Reset (RS) on page 7-115.
MCCB
ELBC
MC2
MC1
R
S
T
Ro
To
FS
FV
FC
FW
RV
CS
SC
FWY
RVY
CSY
MA
MB
MC
U
V
W
MC3
THRY
Motor
MC1
MC2
MC3
FW
CS
MC1
MC2
MC3
FW
CS
ON
ON
ON
ON
ON
Operation
Inverter
output
frequency
Interlock time of MC2 and MC3
(0.5 to 1 s)
ON
ON
ON OFF
0.5 to 1 s
Retry wait time b003
Operation
Operates after frequency matching.
Inverter-to-Commercial
switching operation timing diagram
Commercial-to-Inverter
switching operation timing diagram