Omron SYSDRIVE 3G3EV User Manual page 32

Design
3-2-2 Wiring Around the Main Circuit
System reliability and noise resistance are affected by the wiring method
used. Therefore, always follow the instructions given below when connect-
ing the Inverter to peripheral devices and other parts.
H Wire Size and Molded-Case Circuit Breaker to be Used
For the main circuit and ground, always use 600-V polyvinyl chloride (PVC) cables.
If the cable is long and may cause voltage drops, increase the wire size according to the
cable length.
Model
3G3EV-A2001M(-j)
3G3EV-AB001M(-j)
3G3EV-A2002M(-j)
3G3EV-AB002M(-j)
3G3EV-A4002M(-j)
3G3EV-A2004M(-j)
3G3EV-AB004M(-j)
3G3EV-A4004M(-j)
3G3EV-A2007M(-j)
3G3EV-AB007M(-j)
3G3EV-A4007M(-j)
3G3EV-A2015M(-j)
3G3EV-AB015M(-j)
3G3EV-A4015M(-j)
Note Tighten the M3.5 terminal screw to the torque of 0.8 N S m.
Determining the Wire Size
Determine the wire size for the main circuit so that line voltage drop is within 2% of the
rated voltage.
Line voltage drop V
V (V) = 3 x wire resistance (Ω/km) x wire length (m) x amperage (A) x 10
D
D Calculating the Inverter Input Power Supply Capacity
The following formula can generally be used to calculate the input power supply capac-
ity for the Inverter. Always select an Inverter with more than sufficient capacity.
3-12
Terminal
symbol
R S T B1 B2
U V W
R S T B1 B2
U V W
R S T B1 B2
U V W
R S T B1 B2
U V W
R S T B1 B2
U V W
is calculated as follows:
D
Terminal Wire size
screw
M3.5 0.75 to 2
M3.5 0.75 to 2
M3.5 0.75 to 2
M3.5 0.75 to 2
M3.5 0.75 to 2
1.25 to 2
0.75 to 2
Chapter 3
Molded-case
2
(mm ) circuit breaker
capacity (A)
10
5
5
5
10
5
10
20
5
20
20
10
–3