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13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
13.9.4 Selection example of wires
POINT
Wires indicated in this section are separated wires. When using a cable for
power line (U, V, and W) between the servo amplifier and servo motor, use a
600V grade EP rubber insulated chloroprene sheath cab-tire cable (2PNCT).
For selection of cables, refer to appendix 6.
To comply with the UL/C-UL (CSA) Standard, use UL-recognized copper
wires rated at 60
(140 ) or more for wiring. To comply with other
standards, use a wire that is complied with each standard
Selection condition of wire size is as follows.
Construction condition: One wire is constructed in the air
Wire length: 30m or less
The following diagram shows the wires used for wiring. Use the wires given in this paragraph or equivalent.
Converter unit Drive unit Servo motor
C
P
1
P
2
L1
L
2
L
3
L
11
L21
V
U
W
V
U
W
Motor
Encoder
OHS1
OHS2
Cooling fan
BU
BV
BW
L
11
L21
2) Control power supply lead
3) Motor power supply lead
6) Thermal relay
Encoder cable
5) Cooling fan
lead
3)
Power supply
1)
Power factor
improving
DC reactor
4) Regenerative option lead
Regenerative option
1) Main circuit power
supply lead
Power supply
Thermal
relay