YASKAWA SGDH - SERVOPACK Main Circuit Wire Size; Cable Types

5.3 SERVOPACK Main Circuit Wire Size
5-45
5
5.3 SERVOPACK Main Circuit Wire Size
1. Wire sizes were selected for three cables per bundle at 40 °C (104 °F) ambient temperature with the rated
current.
2. Use cable with a minimum withstand voltage of 600 V for main circuits.
3. If cables are bundled in PVC or metal ducts, consider the reduction ratio of the allowable current.
4. Use heat-resistant cables under high ambient or panel temperatures where normal vinyl cables will rap-
idly deteriorate.
5. Use cables within the allowable moment of inertia.
6. Do not use cables under continuous regenerative state.
5.3.1 Cable Types
The following table shows the wire size and allowable current for three cables. Use a cable whose specifications
meet or are less than the values in the table.
• 600-V Heat-resistant Vinyl Cables (HIV)
Note: The values in the table are only for reference.
IMPORTANT
Cable Types Allowable
Conductor
Temperature
°C (°F)
Symbol Name
PVC Normal vinyl cable
−
IV 600-V vinyl cable
60 (140)
HIV
Temperature-resistant
vinyl cable
75 (167)
AWG Size
Nominal
Cross
Section
Diameter
mm
2
(in
2
)
Configuration
Number of
wires/mm
2
(in
2
)
Conductive
Resistance
Ω/km
Allowable Current at Ambient Temperature
A
30°C (86
°F)
40°C
(104
°F)
50°C
(122°F)
20 0.5 (0.00078)
19/0.18
(0.00028)
39.5 6.6 5.6 4.5
- 0.75 (0.00116)
30/0.18
(0.00028)
26.0 8.8 7.0 5.5
18 0.9 (0.00140)
37/0.18
(0.00028)
24.4 9.0 7.7 6.0
16 1.25 (0.00193)
50/0.18
(0.00028)
15.6 12.0 11.0 8.5
14 2.0 (0.00310) 7/0.6 (0.00093) 9.53 23 20 16
12 3.5 (0.00543) 7/0.8 (0.00124) 5.41 33 29 24
10 5.5 (0.00853) 7/1.0 (0.00155) 3.47 43 38 31
8 8.0 (0.0124) 7/1.2 (0.00186) 2.41 55 49 40
6 14.0 (0.0217) 7/1.6 (0.00248) 1.35 79 70 57
4 22.0 (0.0341) 7/2.0 (0.00310) 0.85 91 81 66