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10.0 POWER WIRING
Note drive input and output current ratings and check applicable electrical codes
for required wire type and size, grounding requirements, overcurrent protection,
and incoming power disconnect, before wiring the drive. Size conservatively to
minimize voltage drop.
Input fusing and a power disconnect switch or contactor MUST be wired in series
with terminals L1, L2, and L3 (L1 and L2 if input is single phase). If one has not
been supplied by AC Technology Corporation, a disconnect means must be wired
during installation. This disconnect must be used to power down the drive when
servicing, or when the drive is not to be operated for a long period of time, but
should not be used to start and stop the motor. Repetitive cycling of a disconnect
or input contactor (more than once every two minutes) may cause damage to the
drive.
10.1 WIRING FOR SINGLE PHASE OR THREE PHASE INPUT
If the drive is nameplated for 240/120 Vac single phase input, wire the input to
terminals L1 and N and jumper terminals L1 to L2 for 120 Vac input voltage, or
wire to terminals L1 and L2 (do not wire to N) for 240 Vac input voltage. Refer
to Section 11.0 - MC1000 POWER WIRING DIAGRAM.
If the drive is nameplated for three phase input only, wire the input to terminals
L1, L2, and L3.
All three power output wires, from terminals T1, T2, and T3 to the motor, must
be kept tightly bundled and run in a separate conduit away from all other power
and control wiring.
It is not recommended to install contactors or disconnect switches between the
drive and motor. Operating such devices while the drive is running can potentially
cause damage to the drive's power components. If such a device is required, it
should only be operated when the drive is in a STOP state. If there is potential for
the device to be opened while the drive is running, the drive must be programmed
for COAST TO STOP (see Parameter 26 - STOP), and an auxiliary contact on the
device must be interlocked with the drive's run circuit. This will give the drive a
stop command at the same time the device opens, and will not allow the drive to
start again until the device is closed.
WARNING!
Hazard of electrical shock! Disconnect incoming power and wait three minutes
before servicing the drive. Capacitors retain charge after power is removed.
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