Installation
2–22
F232048
Electrical Installation
(Continued)
The AC drive provides thermal overload
protection for the drive motor. However, a
separate three-phase circuit breaker must be
installed for complete electrical overload
protection. This prevents damage to the motor
by disconnecting all legs if one should be lost
accidentally. Refer to the table below for
circuit breaker requirements. Do not use fuses
in place of the circuit breaker.
If input voltage measures above 240V for a Q
voltage machine, above 415V for a P voltage
machine, or above 480V for an N voltage
machine, either ask the power company if their
representative can lower the voltage or install a
step-down transformer kit available from the
manufacturer. Voltages above 250V and 490V
require additional measures. Contact the
distributor or the manufacturer for assistance.
Use wire size indicated in the Voltage
Designation Chart for runs up to 50 feet. Use
next larger size for runs of 50 to 100 feet. Use
two sizes larger for runs greater than 100 feet.
Note: UY models must be connected to three-
phase service. The use of Roto-Phases or other
phase adders is forbidden.
Note: If a Delta supply system is used, the
high leg must be connected to L3.
The machine should be connected to an
individual branch circuit not shared with
lighting or other equipment.
Voltage Designation Chart
Model
Code
Voltage
Cycle
Phase
Wire
Full
Load
Amps
Breaker
Size
(Amps)
AWG
mm
2
75
N
440-480
50-60
3
3
2.6
15
14
2.50
P
380-415
50-60
3
3
3.0
15
14
2.50
Q
200-240
50-60
3
3
5.8
15
14
2.50
160
N
440-480
50-60
3
3
4.2
15
14
2.50
P
380-415
50-60
3
3
4.8
15
14
2.50
Q
200-240
50-60
3
3
9.2
15
14
2.50
230
N
440-480
50-60
3
3
6.7
15
14
2.50
P
380-415
50-60
3
3
7.8
15
14
2.50
Q
200-240
50-60
3
3
14.7
20
12
4.00
Note: wire sizes shown are for copper, THHN, 90° conductor per NEC article 310.
