Siemens Stober CombiDrive CM400/3 - Manual (Page 5)

2. Installation English
© STÖBER plc 1997
3 05.02.01
2. INSTALLATION
WARNING
To guarantee the safe operation of the equipment it must be installed and commissioned by
qualified personnel only.
Take particular note of the general and regional installation and safety regulations regarding
work on high voltage installations (e.g. VDE), as well as the relevant regulations regarding the
correct use of tools and personal protective gear.
Use the lifting eyes provided if the motor has to be lifted. Do not lift machine sets (e.g. built-on
gearboxes, fan units) by suspending the individual machines!
If the PROFIBUS option has been fitted, remove the PROFIBUS module before attaching
cables or chains to the lifting eyes.
Always check the capacity of the hoist before lifting any equipment.
2.1 Wiring Guidelines to Minimise the Effects of EMI
The CombiDrive ® are designed to operate in an industrial environment where a high level of Electro Magnetic
Interference (EMI) can be expected. Usually, good installation practices will ensure safe and trouble free
operation. However, if problems are encountered, the following guidelines may prove useful. In particular,
grounding of the system 0V at the inverter, as described below, may prove effective.
(1) Ensure that all equipment is well earthed using short, thick earthing cable connected to a common star
point or busbar. It is particularly important that any control equipment that is connected to the inverter
(such as a PLC) is connected to the same earth or star point as the inverter via a short, thick link. Flat
conductors (e.g. metal brackets) are preferred as they have lower impedance at high frequencies.
(2) Wherever possible, use screened leads for connections to the control circuitry. Terminate the ends of
the cable neatly, ensuring that long strands of unscreened wire are not left visible.
(3) Separate the control cables from the power connections as much as possible, using separate trunking,
etc. If control and power cables cross, arrange the cables so that they cross at 90°.
(4) Ensure that contactors in the cubicle are suppressed, either with R-C suppressors for AC contactors
or ‘flywheel’ diodes for DC contactors, fitted to the coils. Varistor suppressors are also effective. This
is particularly important if the contactors are controlled from the relay connection on the CombiDrive
® .
(5) Use screened or armoured cables for the power connections and ground the screen at both ends via
the cable glands.
On no account must safety regulations be compromised when installing the
CombiDrive ® !