Lenze MC3000 Series - Manual (Page 24)

20 13435743_EDBM301_v14 .0
10 POWER WIRING
WARNING!
Hazard of electrical shock! Disconnect incoming power and wait
three minutes before servicing the drive . Capacitors retain charge
after power is removed .
Note the 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 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 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 - MC3000
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 .