Power Wiring; Input And Output Wiring - Lenze SM004S Operating Instructions Manual

3 Installation
3.3

Power Wiring

DANGER!
Hazard of electrical shock! Capacitors retain charge after power is removed. Before
servicing the drive, disconnect the incoming power and wait until the voltage between
terminals B+ and B- is 0 VDC.
Note the drive input and output current ratings and the 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
and L2/N (on single-phase input models), or terminals L1, L2, and L3 (on three-phase input models).
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.
3.3.1

Input and Output Wiring

On single phase input models, wire the input power to terminals L1 and L2/N. On three phase input
models, wire the input power to terminals L1, L2, and L3. Refer to Section 3.4, SCL/SCM Power Wiring
Diagram.
Keep all three power output wires, from terminals U, V, and W to the motor, tightly bundled and run
them 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 (refer to Parameter 4 - STOP METHOD), 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.
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Lenze 13466147 EDBSM01 v19 EN