Yaskawa FSP Short Form - Manual (Page 25)

FSP Amplifier Short Form Installation Guide Wiring
25
5.3. Main Circuit Wire Size
Cable Types
Cable Types
Symbol Name
Allowable Conductor
Temperature ºC (ºF)
PVC Normal vinyl cable —
IV 600V vinyl cable 60 (140)
HIV Temperature-resistant vinyl cable 75 (167)
• Wire sizes are selected for three cables per bundle at 40°C (104°F) ambient
temperature with the rated current.
• Use cable with a minimum withstand voltage of 600V for main circuits.
• If cables are bundled in PVC or metal ducts, consider the reduction ratio of the
allowable current.
• Use heat-resistant cables under high ambient or panel temperatures where
normal vinyl cables will rapidly deteriorate.
• Use cables within the allowable moment of inertia.
• Do not use cables under continuous regenerative state.
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)
Allowable Current at Ambient
Temperature
AWG
Size
Nominal
Cross
Section
Diameter
mm
2
(in
2
)
Configuration
Number of
wires/mm
2
(in
2
)
Conductive
Resistance
Ω/km
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 (0.01240) 7/1.2 (0.00186) 2.41 55 49 40
6 14.0 (0.02170) 7/1.6 (0.00248) 1.35 79 70 57
4 22.0 (0.03410) 7/2.0 (0.00310) 0.85 91 81 66
Note: The values in the table are for reference only.