Technical Information - Siemens SIMODRIVE 611 digital Configuration Manual

05.08
05.01
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SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
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Technical information

Warning: High leakage current
As a result of the high switching frequencies, capacitances (parasitic and
integrated) with respect to ground may cause high leakage currents. This is the
reason that a permanent PE connection is required at the control cabinet and
at the line filter!
Measures according to EN 50178/94 Part 5.3.2.1 must be implemented, e.g.
1. Copper protective conductor with a minimum cross–section of 10 mm
should be connected, or
2. A second conductor should be connected in parallel with the protective
conductor through separate terminals.
This conductor must also fully meet the requirements for PE conductors
according to IEC 364–5–543.
Note
The SIMODRIVE unit may be directly connected to TN line supplies with
selectively tripping, AC/DC–sensitive RCCBs as protective measure.
Upstream devices providing protection against hazardous leakage currents or
for fire protection (such as residual–current protective devices) must be
AC/DC–sensitive in accordance with the requirements of DIN EN 50178. In the
case of other residual current protective devices, a transformer with separate
windings must be connected upstream of the converter for purposes of
decoupling. See Chapter 7.
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