Description
SINAMICS DCP
22 Operating Instructions, 09/2019, A5E34382853K
Protective measures for plants and systems equipped with SINAMICS DCP
The following alarms and/or notes must be carefully taken into consideration when
implementing electrical systems in which a SINAMICS DCP is used.
Especially the requirements relating to protection against electric shock for the load or
consumer side according to IEC 60364 must be strictly complied with.
Electric shock when using SINAMICS DCP in plants and systems without adequate
protective measures
The DCP alone does not provide protection against electric shock through basis protection
(touch protection) and does not provide fault protection where the supply is automatically
shut down IEC 60364-4-41.
Using a SINAMICS DCP without adequate measures to protect against electric shock can
result in death or severe injury.
• Ensure that there is sufficient basis protection (touch protection) by installing the
equipment in a suitable control cabinet.
• Apply measures to automatically shut down the supply in the case of a fault (e.g. RCD,
ground fault monitoring, short-circuit monitoring).
For an automatic shutdown, all energy sources must be separated through all poles and
at all sides.
Electric shock as there is no electrical separation
SINAMICS DCP has no electrical separation between the power connections of side 1 and
side 2, terminals N1 (side 1) and N2 (side 2) are internally directly connected with one
another.
Further, a connection is established between terminals P1 (side 1) and P2 (side 2) as a
result of the power semiconductors.
The DCP does not have any switching devices to disconnect the power connections.
As a consequence, it must always be assumed that there is hazardous voltage at both
sides of the DCP. This is also true when the DCP is switched off.
As a consequence, serious injury or death can occur.
• Install the appropriate switching devices (e.g. contactors, circuit breakers) to electrically
isolate the power connections.
Electric shock if the insulation voltage is exceeded
An excessively high voltage will damage the insulation resulting in death or severe injury.
• Do not connect any voltage sources (e.g. PV arrays) whose no-load voltage exceeds
the permissible values of the device.
• To rule out any damage, route the cables so that they are protected
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