Main Circuit Wire - YASKAWA SGDV series User Manual

3.1.2 Main Circuit Wire

This section describes the main circuit wires for SERVOPACKs and converters.
(1) Wire Types
Use the following type of wire for main circuit.
Symbol
IV 600 V polyvinyl chloride insulated wire
HIV 600 V grade heat-resistant polyvinyl chloride insulated wire
The following table shows the wire sizes and allowable currents for three wires.
Use wires with specifications equal to or less than those shown in the table.
Nominal Cross
Section Diameter
2
(mm )
0.5
0.75
0.9
1.25
2
3.5
5.5
8
14
22
38
60
100
Note: These are reference values for 600-V-grade, heat-resistant, PVC-insulated wire.
• The specified wire sizes are for use when the three lead cables are bundled and when
the rated electric current is applied with a surrounding air temperature of 40°C.
• Use a wire with a minimum withstand voltage of 600 V for the main circuit.
• If cables are bundled in PVC or metal ducts, take into account the reduction of the
allowable current.
• Use a heat-resistant wire under high surrounding air or panel temperatures, where
polyvinyl chloride insulated wires will rapidly deteriorate.
Cable Type
Name
Configuration
AWG Size (Number of Wires/
mm)
(20) 19/0.18
(19) 30/0.18
(18) 37/0.18
(16) 50/0.18
(14) 7/0.6
(12) 7/0.8
(10) 7/1.0
(8) 7/1.2
(6) 7/1.6
(4) 7/2.0
(1) 7/2.6
(2/0) 19/2.0
(4/0) 19/2.6
Allowable Conductor Temperature
Allowable Current at Surrounding Air
Conductive
Resistance (Ω/
km)
30°C
39.5 6.6
26 8.8
24.4 9
15.6 12
9.53 23
5.41 33
3.47 43
2.41 55
1.35 79
0.85 91
0.49 124
0.30 170
0.18 240
3.1 Main Circuit Wiring
(°C)
60
75
Temperature (A)
40°C 50°C
5.6 4.5
7 5.5
7.7 6
11 8.5
20 16
29 24
38 31
49 40
70 57
81 66
110 93
150 127
212 179
3
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