Siemens MICROMASTER 420 - Manual (Page 37)

Issue 07/04 3 Functions
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0 37
WARNING
MICROMASTER drive inverters operate with high voltages.
When electrical equipment is operated, then specific parts of this equipment are
at hazardous voltage levels.
Emergency switching-off devices in compliance with EN 60204 IEC 204 (VDE
0113) must remain functional in all operating modes of the control device. When
the Emergency switching-off device is reset, then it is not permissible that the
equipment runs-up again in an uncontrolled or undefined way.
In cases and situations where short-circuits in the control device can result in
significant material damage or even severe bodily injury (i.e. potentially
hazardous short-circuits), then additional external measures or
devices/equipment must be provided in order to ensure or force operation
without any potential hazards, even if a short-circuit occurs (e.g. independent
limit switches, mechanical interlocks etc.).
Certain parameter settings can mean that the drive inverter automatically
restarts after the power supply voltage fails and then returns.
The motor parameters must be precisely configured in order to ensure perfect
motor overload protection.
The drive inverter provides internal motor overload protection according to
UL508C, Section 42. Also refer to P0610, P0611 and P0335 - I
2 t is enabled in
the default setting.
The drive inverter is suitable for use in circuits which supply a maximum
symmetrical (balanced) current 10,000 A (RMS) at a maximum voltage of 230 V
/ 460 V – if it is protected using a type H or K fuse (also refer to Tables 5-5).
The drive unit may not be used as 'Emergency switching-off device' (refer to EN
60204, 9.2.5.4).
CAUTION
Only qualified personnel may commission (start-up) the equipment. Safety
measures and warnings must be always extremely carefully observed and fulfilled.