Input Power and Control Wiring
AFDK-SVU01C-EN
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3. Once removed, drill the wire routing holes in the panel.
These wire routing holes are the only entry points for
input power wiring into the cabinet.
4. Install the appropriate conduit hubs.
5. Reinstall the cabinet’s top panel.
6. Connect the three-phase input power leads to circuit
breaker terminals L1, L2, and L3. Tighten these
connections to the values given in
. Use only
copper-conductors for the input power leads.
Input power wiring should be copper and should be
sized according to applicable codes to handle the
drive’s continuous rated input current.
Important:
Power connections should be re-torqued
after the first three to six months of
operation and on an annual basis thereafter.
Table 16. Circuit breaker terminal specifications
Frame Size
Cable Range
Wire Binding
Screw Torque
Frame 3 Drives (405, 600 A) (3) 3/0 - 500 KCM
25 ft·lb (34 N·m)
Frame 4 Drives (900, 1200 A) (4) 500 - 1000 KCM 45.8 ft·lb (62.1 N·m)
Grounding the Cabinet
Note:
Follow Applicable Codes! The user is responsible
for conforming to all applicable, local, national, and
international codes. Failure to observe this
precaution could result in damage to, or
destruction of, the equipment.
Use the following steps to ground the cabinet:
1. Open the left-hand enclosure door of the drive. The
grounding stud is located just above and to the right of
the breaker.
2. Run a suitable earth ground (completed by field) to the
cabinet’s ground connection point. The grounding lug
is capable of accepting up to 2–600 MCM wire. Tighten
the ground connections to 375 in·lb (42.4 N·m).
WARNING
Proper Field Wiring and Grounding
Required!
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state electrical codes. Failure to
follow code could result in death or serious injury.
NOTICE
Equipment Damage!
Do not route signal and control wiring with power
wiring in the same conduit. This can interfere with drive
operation. Failure to observe this precaution could
result in damage to the equipment.
An input disconnect circuit breaker is factory-installed in
the cabinet. Verify that the available fault current is less
than the interrupting rating on the circuit breaker
nameplate, which is 65,000 amps at 480 volts ac.
Installing Shorting Busbars
Note:
Shorting busbars must be installed since the AFDK
is a three-lead device while the starter was a six-
lead device. The wires must be connected (shorted)
at both ends (at the AFDK and at the motor
terminals) to ensure that there is no difference in
potential between the two paired leads caused by
different wire lengths. Some existing starters may
have this done already.
1. Remove the motor terminal lug from all six terminals
on the compressor motor terminal board.
2. Install the three busbars provided, one each between
the following motor terminal pairs
a. T1 - T6
b. T2 - T4
c. T3 - T5
3. Reinstall all of the motor terminal lugs.
