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| Optidrive ODE-3 User Guide |
Version 2.00
www.invertekdrives.com
4.3.3. Optional Input Choke
An 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).
In 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
Frame Size
AC Input Inductor
230 Volt
1 Phase
1
OPT-2-L1016-20
2
OPT-2-L1025-20
3
N/A
400 Volt
3 Phase
2
OPT-2-L3006-20
2
OPT-2-L3010-20
3
OPT-2-L3036-20
4
OPT-2-L3050-20
4.4. Motor Connection
The 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 then there is no preventative measures required, however if the
quality of insulation is unknown then the motor manufacturer should be consulted and preventative measures may be required.
The 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.
The motor earth must be connected to one of the Optidrive earth terminals.
Maximum permitted motor cable length for all models: 100 metres shielded, 150 metres unshielded.
Where multiple motors are connected to a single drive using parallel cables, an output choke
must
be installed.
4.5. Motor Terminal Box Connections
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
Motor Nameplate Voltages
Connection
230
230 / 400
Delta
400
400 / 690
400
230 / 400
Star
4.6. Control Terminal Wiring
All analog signal cables should be suitably shielded. Twisted pair cables are recommended.
Power and Control Signal cables should be routed separately where possible, and must not be routed parallel to each other.
Signal levels of different voltages e.g. 24 Volt DC and 110 Volt AC, should not be routed in the same cable.
Maximum control terminal tightening torque is 0.5Nm.
Control Cable entry conductor size: 0.05 – 2.5mm2 / 30 – 12 AWG.
Power & Contr
ol Wiring
4
