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3
Preparatory measures
All tasks for transport, installation and commissioning as well as for servicing should be carried
out by
qualified technicians (IEC 364 or CENELEC HD 384 or DIN VDE 0100 and IEC 664
or DIN VDE 0110 and national accident prevention regulations) .
Qualified technicians are persons that are familiar with the setting up, assembly, commis
-
sioning and operation of the product and have the appropriate qualifications for their tasks.
Setting up
The setting up and the cooling of the devices need to be done according to the directives of
the corresponding pump documentation.
The frequency converters need to be protected against excessive strain. In particular, compo-
nents must neither be bent nor insulation dimensions changed during transport and handling.
Avoid touching electronic components and contacts.
Frequency converters contain electrostatically-endangered components that can be easily
damaged by improper handling. Electrical components must neither be damaged mechanically
nor destroyed (possible health hazard!).
Electrical connection
Frequency converters are components for use in industrial high-voltage systems and are
operated with voltages that can cause serious injuries or even death if touched.
Installations and maintenance may only be done by
qualified electricians
and when the
device is free of voltage. The operating instructions have to be available for these persons
at all times and be dutifully observed by them.
On the circuit boards there are highly sensitive MOS semiconductor devices that are es-
pecially sensitive to static electricity. Therefore, please avoid touching the circuit boards or
components with your hands or with metallic objects. Only the screws of the terminal strips
may be touched by insulated screwdrivers when wires are connected.
The frequency converter is intended for permanent connection only and may not be operated
without an effective earth connection that complies with the local regulations for high leakage
currents
(> 3.5 mA). VDE 0160 prescribes the laying of a second earth line or an earth cross-section
of at least 10 mm
2
.
If personal or fire protection is required when using the FC, all-current sensitive residual-
current devices (type B RCD) must be used (in accordance with VDE 0664). They provide
reliable protection for the high-frequency AC currents and the smooth and pulsating DC re-
sidual currents that occur during FC operation. Conventional type A residual-current devices
are not suitable for this purpose.
When working on frequency converters that are electrically charged, the relevant national
accident prevention regulations must be observed.
The local regulations on installing electrical systems as well as the accident prevention re-
gulations must be observed.
The electrical installation is to be carried out according to the applicable regulations (e.g.
cable cross-sections, fuses, earth lines).
Information on EMC-compliant installation – such as insulation, earthing, arrangement of filters
and the laying of lines – can be found in the documentation for the frequency converters.
Always observe these instructions also with CE-marked frequency converters. The responsi-
bility of complying with the limits required by the EMC regulations lies with the manufacturer
of the system or machine.
