Siemens MICROMASTER 411 Operating Instructions Manual page 20

2 Installation
WARNING
Work on the device/system by unqualified personnel or failure to comply with
warnings can result in severe personal injury or serious damage to material.
Only suitably qualified personnel trained in the setup, installation,
commissioning and operation of the product should carry out work on the
device/system.
Only permanently wired input power connections are allowed. This equipment
must be grounded (IEC 536 Class 1, NEC and other applicable standards).
If a Residual Current-operated protective Device (RCD) is to be used, it must
be an RCD type B.
Machines with a three-phase power supply, fitted with EMC filters, must not be
connected to a supply via an ELCB (Earth Leakage Circuit-Breaker EN50178
Section 5.2.11.1).
The following terminals can carry dangerous voltages even if the inverter is
inoperative:
- power supply terminals L1, L2, L3
- motor terminals U, V, W
- additionally the terminals DC+, DC-
Always wait 5 minutes to allow the unit to discharge after switching off before
carrying out any installation work.
This equipment must not be used as an 'emergency stop mechanism' (see EN
60204, 9.2.5.4)
The minimum size of the earth-bonding conductor must be equal to or greater
than the cross-section of the power supply cables.
CAUTION
The connection of power and motor cables to the inverter must be carried out as
shown in Figure 2-10 to prevent inductive and capacitive interference from
affecting the correct functioning of the inverter.
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MICROMASTER 411 & COMBIMASTER 411
Issue 03/01
Operating Instructions
6SE6400-5CA00-0BP0