Motor Connection; Motor Terminal Box Connections - Invertek Drives OPTIDRIVE E3 User Manual

4.4.3. Optional Input Choke
 A n optional Input Choke is recommended to be installed in the supply line for drives where any of the following conditions occur:
o The incoming supply impedance is low or the fault level / short circuit current is high.
o The supply is prone to dips or brown outs.
o An imbalance exists on the supply (3 phase drives).
o The power supply to the drive is via a busbar and brush gear system (typically overhead Cranes).
 I n all other installations, an input choke is recommended to ensure protection of the drive against power supply faults. Part numbers
are shown in the table.
Supply
230 Volt
1 Phase
400 Volt
3 Phase

4.5. Motor Connection

 T he drive inherently produces fast switching of the output voltage (PWM) to the motor compared to the mains supply. For motors
which have been wound for operation with a variable speed drive additional measures are not required; however if the quality of
insulation is unknown the motor manufacturer should be consulted and preventative measures may be required.
 T he motor should be connected to the Optidrive U, V, and W terminals using a suitable 3 or 4 core cable. Where a 3 core cable
is utilised, with the shield operating as an earth conductor, the shield must have a cross sectional area at least equal to the phase
conductors when they are made from the same material. Where a 4 core cable is utilised, the earth conductor must be of at least
equal cross sectional area and manufactured from the same material as the phase conductors.
 T he motor earth must be connected to one of the Optidrive earth terminals.
 M aximum permitted motor cable length for all models: 100 metres shielded, 150 metres unshielded.
 W here multiple motors are connected to a single drive using parallel cables, an output choke must be installed.

4.6. Motor Terminal Box Connections

Do not install any mechanical or electro-mechanical switching devices between the drive and motor. Where a local isolator is
installed close to the motor, this should be interlocked with the drive control circuit to ensure the drive is disabled when the motor is
isolated.
Most general purpose motors are wound for operation on dual voltage supplies. This is indicated on the nameplate of the motor. This
operational voltage is normally selected when installing the motor by selecting either STAR or DELTA connection. STAR always gives
the higher of the two voltage ratings.
Incoming Supply Voltage
230
400
400
www.invertekdrives.com
Frame Size
1
2
1
2
Motor Nameplate Voltages
230 / 400
400 / 690
230 / 400
Version 1.00 | Optidrive ODE-3 IP66 Outdoor Rated User Guide | 13
AC Input Inductor
OPT-2-L1016-66
OPT-2-L1025-66
OPT-2-L3006-66
OPT-2-L3010-66
Connection
Delta
Star
4