Lenze MC1000 Series - Manual (Page 25)

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10 POWER WIRING
WARNING!
Hazard of electrical shock! Wait three minutes after disconnecting incoming
power before servicing drive. Capacitors retain charge after power is removed.
Note drive input and output current ratings and check applicable electrical codes
for required wire type and size, grounding requirements, over current 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 Lenze AC Tech 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 name plated 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 - MC1000 POWER WIRING DIAGRAM.
If the drive is name plated for three phase input only, wire the input to terminals
L1, L2, and L3.
NOTE:
Refer to Appendix A for alternate single wiring configuration on selected models.
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.
Do not 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.