16 | Optidrive CoolVert User Guide | Version 1.00 www.invertekdrives.com
3
Installation
General
1
Compliance with category C1 conducted emissions only is achieved. To ensure compliance with category C2 radiated emissions
with the single phase 230V PFC drives, it is necessary to install a ferrite core (e.g. Fair-Rite round cable snap ferrite 0431176451),
one around the supply cable and the second around the supply earth.
Supply Cable
2
A screened (shielded) cable suitable for fixed installation with the relevant mains voltage in use. 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. Installation
of a standard cable within a suitable steel or copper tube is also acceptable – in this case, ensure that metal tube is adequately
grounded.
3
A cable suitable for fixed installation with relevant mains voltage with a concentric protection wire. Installation of a standard cable
within a suitable steel or copper tube is also acceptable.
Motor Cable
4
A screened (shielded) cable suitable for fixed installation with the relevant voltage in use. 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. Installation of a standard
cable within a suitable steel or copper tube is also acceptable – in this case, ensure that metal tube is adequately grounded.
5
The cable shield should be terminated at the motor end using an EMC type gland allowing connection to the motor body through
the largest possible surface area. The shield must also be terminated at the drive end, as close as practically possible to the drive
output terminals. Where drives are mounted in a steel control panel enclosure, the cable screen may be terminated directly to the
control panel backplate using a suitable EMC clamp or gland fitted as close to the drive as possible. The drive earth terminal must
also be connected directly to this point, using a suitable cable which provides low impedance to high frequency currents.
Control Cable
6
A shielded cable with low impedance shield. Twisted pair cable is recommended for analogue signals.
3.3.2. Incoming Power Connection
Cable Selection
For 1 phase supply, the mains power cables should be connected to L1/L, L2/N.
For 3 phase supplies, the mains power cables should be connected to L1, L2, and L3. Phase sequence is not important.
For compliance with CE and C Tick EMC requirements, refer to section 3.3. EMC Compliant Installation on page 14.
A fixed installation is required according to IEC61800-5-1 with 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. Maximum dimensions are given in section 6.2.
Detailed Product Rating Tables on page 44.
Fuse / Circuit Breaker Selection
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 6.2. Detailed Product Rating Tables. The fuses must comply with any local codes or regulations in place.
In general, type gG (IEC 60269) or UL type J 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.
The maximum permissible short circuit current at the Optidrive Power terminals as defined in IEC60439-1 is 100kA.
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: 10 metres shielded, 20 metres unshielded.
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