Siemens MICROMASTER 420 Operating Instructions Manual page 22

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:
- the power supply terminals L/L1, N/L2, L3.
- the motor terminals U, V, W, 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)
CAUTION
The connection of power, motor and control cables to the inverter must be carried
out as shown in Fig. 2-8 on page 33, to prevent inductive and capacitive
interference from affecting the correct functioning of the inverter.
22
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
Issue 07/04