Siemens SINAMICS S120 Combi User Manual page 10

Preface
General safety instructions
Commissioning is absolutely prohibited until it has been completely ensured that the
machine, in which the components described here are to be installed, is in full compliance
with the provisions of the EC Machinery Directive.
Only qualified personnel may install, commission and service SINAMICS S units.
The personnel must take into account the information provided in the technical customer
documentation for the product, and be familiar with and observe the specified danger and
warning notices.
Operational electrical equipment and motors have parts and components which are at
hazardous voltage levels that may cause serious injuries or death when touched.
All work on the electrical system must be carried out when the system has been
disconnected from the power supply.
In combination with the drive system, the motors are generally approved for operation on
TN and TT line supplies with grounded neutral and on IT line supplies.
In operation on IT line supplies, the occurrence of a first fault between an active part and
ground must be signaled by a monitoring device. In accordance with IEC 60364-4-41 it is
recommended that the first fault should be eliminated as quickly as practically possible.
For line supplies with a grounded phase conductor, an isolating transformer with grounded
neutral (secondary side) must be connected between the supply and the drive system to
protect the motor insulation from excessive stress. The majority of TT line supplies have a
grounded phase conductor, so in this case an isolating transformer must be used.
Correct and safe operation of SINAMICS S units assumes correct transportation in the
transport packaging, correct long-term storage in the transport packaging, setup and
installation, as well as careful operation and maintenance.
The details in the catalogs and proposals also apply to the design of special equipment
versions.
In addition to the danger and warning information provided in the technical customer
documentation, the applicable national, local, and system-specific regulations and
requirements must be taken into account.
According to EN 61800-5-1 and UL 508 only safely isolated protective extra-low voltages of
the electronic modules may be connected to all connections and terminals.
Using protection against direct contact via DVC A (PELV) is only permissible in areas with
equipotential bonding and in dry rooms indoors. If these conditions are not fulfilled, other
protective measures against electric shock (e.g. protection through protective impedances
or limited voltage, or use of protection class I and II) must be used.
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DANGER
DANGER
DANGER
SINAMICS S120 Combi
Manual, Edition 07/2012, 6SL3097-4AV00-0BP3