Incoming Power Connection; Drive And Motor Connection; Motor Terminal Box Connections; Motor Thermal Overload Protection - Invertek Drives Eco Optidrive Series User Manual

4.2. Incoming Power Connection


Power should be connected to the L1 and L2 terminals for single phase drives, L1, L2 and L3 for three phase drives. Phase sequence is not
important.

For compliance with CE and C Tick EMC requirements, a symmetrical shielded cable is recommended.

A fixed installation is required according to IEC61800-5-1

For units without an internal isolator / disconnect, a suitable disconnecting device installed between the Optidrive and the AC Power
Source. The disconnecting device must conform to the local safety code / regulations (e.g. within Europe, EN60204-1, Safety of
machinery).

The cables should be dimensioned according to any local codes or regulations.

Suitable fuses to provide wiring protection of the input power cable should be installed in the incoming supply line, according to the data
in section 0. The fuses must comply with any local codes or regulations in place. In general, type gG (IEC 60269) or UL type T fuses are
suitable; however in some cases type aR fuses may be required. The operating time of the fuses must be below 0.5 seconds.

Where allowed by local regulations, suitably dimensioned type B MCB circuit breakers of equivalent rating may be utilised in place of
fuses, providing that the clearing capacity is sufficient for the installation.

When the power supply is removed from the drive, a minimum of 30 seconds should be allowed before re-applying the power. A
minimum of 10 minutes should be allowed before removing the terminal covers or connection.

The maximum permissible short circuit current at the Optidrive Power terminals as defined in IEC60439-1 is 100kA.

4.3. Drive and 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 used,
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.

For compliance with the European EMC directive, a suitable screened (shielded) cable should be used. Braided or twisted type screened
cable where the screen covers at least 85% of the cable surface area, designed with low impedance to HF signals are recommended as a
minimum. Installation within a suitable steel or copper tube is generally also acceptable.

The cable screen should be terminated at the motor end using an EMC type gland allowing connection to the motor body through the
largest possible surface area

Where drives are mounted in a steel control panel enclosure, the cable screen may be terminated directly to the control panel using a
suitable EMC clamp or gland, as close to the drive as possible.

4.4. Motor Terminal Box Connections

Most general purpose motors are wound for operation on two supply voltage. This will be indicated on the nameplate of the motor. The
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
400 / 460

4.5. Motor Thermal overload Protection.

4.5.1. Internal Thermal Overload Protection.
The drive has an in-built,motor,thermal,overload,function,this,is,in,the,form,of,an,"It-trP",trip,after,delivering,>100%,of,the,value,set,in,P1-
08 for a sustained period of time (e.g. 110% for 60 seconds).
16
Optidrive Eco User Guide Revision 2.01
Motor Nameplate Voltages
230 230 / 400
400 / 690
575 575 / 1000
400 230 / 400
575 330 / 575
Connection
Delta
Star
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