Panasonic MINAS A5-series, Руководство по эксплуатации

Страница: 30 / 394

1-18
Recommended Electric Wires for Driver
• For the main circuit, use electric wire that withstands at least 600 VAC with tempera-
ture rating 75℃ or higher.
• When using bundled wires running through metallic conduit, the amounts of current
determined according to the reduction rate must be subtracted from the nominal allow-
able current.
• Electric wires
<In high ambient temperature>
Use heat resistant wire.
Common polyvinyl chloride wires will deteriorate by heat at a higher rate.
<In low ambient temperature>
The surface of vinyl chloride insulation becomes hardened and brittle at low tempera-
ture and needs specific protective measure when used in cold region.
• Bend radius of the cable must be 10 times or more its finish outside diameter.
• Cables cannot be used for continuous regeneration because they are not designed for
such application.
Relationship between Wire Diameter and Permissible Current
• When selecting a cable, refer to the following selection guide showing relationship be-
tween cable specification and current carrying capacity.
Example: Power supply 3-phase, 200 V, 35 A, ambient temperature 30°C
Determine the fundamental permissible current according
to the cable conductor material (example: stranded cop-
per wire).
(For the purpose of this example, the ampere indicated by
is selected from the table right.)
Next, determine the number of conductors.
(In this example, the cable contains conductors ( +
ground).)
Determine the applicable permissible current using the
following formula.
Applicable permissible current
=
fundamental permissible current x current reduction coefficient x current correction coefficient
= 7 x 0.7 x 1.1
.
=. 6.6 (A)
This permissible value is larger than 5 A to be carried though the cable. Therefore,
according to the list of recommended eco-cables, the cable to be selected for the cable
with nominal cross section .5 mm
2
is a polyethylene-insulated heat-resistant -con-
ductor power cable having 13.5 mm finish O.D. (approx. 14.5 mm with shield).
27
37
49
61
88
115
139
2 to 3.5 (excl.)
3.5 to 5.5 (excl.)
5.5 to 8 (excl.)
8 to 14 (excl.)
14 to 22 (excl.)
11 to 30 (excl.)
30 to 38 (excl.)
Stranded
conductor
(nominal cross section: mm
2
)
Copper
wire
(unit: A)
•Fundamental permissible current
5. Installation
Driver