Wire And Terminal Screw Sizes - Omron VARISPEED V7 User Manual

Wire and Terminal Screw Sizes

1. Control Circuits
Model Terminal
Symbols
Same MA, MB, MC
for all
models
S1 to S7, P1,
P2, SC, PC,
R+, R-, S+, S-,
FS, FR, FC,
AM, AC, RP
30
6. Voltage drop should be considered when determining the
wire size.
Voltage drop can be calculated using the following equa-
tion:
Phase-to-phase voltage drop (V)
× Wire resistance (Ω/km) × Wiring distance (m) ×
=
3
Current
-3
(A) × 10
Select a wire size so that voltage drop will be less than 2%
of the normal rated voltage.
7. If the Inverter is connected to a power transformer exceed-
ing 600 kVA, excessive peak current may flow into the
input power supply circuit, and break the converter sec-
tion. In this case, attach an AC reactor (optional) to the
Inverter input side, or a DC reactor (optional) to the DC
reactor connection terminal.
Screws Tightening
Torque
N•m (lb•in)
M3 0.5 to 0.6
(4.44 to 5.33)
M2 0.22 to 0.25
(1.94 to 2.21)
Applicable Size
2
mm
Twisted wires: 20 to 16,
0.5 to 1.25, 20 to 16
Single: 0.5 to 1.25
Twisted wires: 20 to 18,
0.5 to 0.75, 20 to 16
Single: 0.5 to 1.25
Wires
Recom-
mended Size
AWG 2 AWG
mm
0.75 18
0.75 18
Type
Shielded or
equivalent