Chapter 3 – ACS 502 Installation Instructions
3-6 ACS 502 Installation & Start-up Manual
Power Connections
All field wiring should be tightened to the torque values listed on the
component. Where the torque value is not visible, the following values should
be used.
Table 3-5 Circuit Breaker wire torque values
Input Wiring
Four conductors (three phase plus a ground wire) are required for the input
and output wiring. Use copper conductor rated for 167°F (75°C). Input and
output conductors and branch circuit protection must be sized to local codes.
WARNING:
• Do not connect or disconnect input or output power wiring, or control
wires, when power is applied.
• Never connect line voltage to drive output Terminals U
2
, V
2
, and W
2
(T
1
, T
2
, T
3
).
• Do not make any voltage tolerance tests (Hi Pot or Meggar) on any
part of the unit. Disconnect motor wires before taking any
measurements in the motor or motor wires.
• Make sure that power factor correction capacitors are not connected
between the drive and the motor.
The terminal sizes and tightening torques of the power terminals are shown in
the drive. Table 3-1 shows minimum current ratings and maximum I
2
t ratings
for the input fuses to be used with the drive.
Check that the supply capacity is adequate for the drive (P
R
or P
RSQ
).
Figure 3-4 shows input power wiring for the ACS 502.
Unit in.-lbs Nm
ACS502-050-4 to ACS502-060-4 and
ACS502-060-6
120 14
ACS502-075-4 to ACS502-350-4 and
ACS502-075-6 to ACS502-150-6
275 31
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