Access To Power And Motor Terminals - Siemens SINAMICS G120P Hardware Installation Manual

Connecting

4.4 Access to power and motor terminals

Cable cross section for grounding
The material of the protective earthing conductor must be the same as the material of the
power cable. If not, the specific resistance of the protective earthing conductor must not be
higher than the specific resistance of the power cables. The relevant diameter of the power
cables is the diameter of the line supply cables, not the diameter of the motor cables.
For power cables up to 10 mm² (16 mm² Al) and 35 mm² the earth cable must be at least as
big as the power cables.
For power cables larger than 10 mm² (Cu) or 16 mm² (Al) the earth cable must be at least
10 mm² (Cu) or 16 mm² (Al), but need not exceed these sizes.
For power cables with a diameter of more than 35 mm
must have at least half of the size of the cross section of the power cable.
4.4 Access to power and motor terminals
Accessing the power and motor terminals
Do not remove Inverter cover or open Inverter door during operation
This equipment contains dangerous voltages and controls potentially dangerous rotating
mechanical parts. Non-compliance with the warnings or failure to follow the instructions
contained in this manual can result in loss of life, severe personal injury or serious damage
to property.
Protection in case of direct contact by means of SELV / PELV is only permissible in areas
with equipotential bonding and in dry indoor rooms. If these conditions are not fulfilled,
other protective measures against electric shock must be applied e.g. protective insulation.
Only suitably qualified personnel should work on this equipment, and only after becoming
familiar with all safety notices, installation, operation and maintenance procedures
contained in this manual. The successful and safe operation of this equipment is dependent
upon its proper handling, installation, operation and maintenance.
The power supply, DC and motor terminals and thermistor cables can carry dangerous
voltages even if the inverter is inoperative. The Control Unit can be powered from an
external 230 V supply, if this is the case, then the external power supply must also be
disconnected. Wait at least five minutes to allow the unit to discharge after switching off the
line supply before carrying out any installation work.
It is strictly prohibited for any mains disconnection to be performed on the motor-side of the
system; any disconnection of the mains must be performed on the mains-side of the
Inverter.
When connecting the line supply to the Inverter, make sure that the terminal case of the
motor is closed.
42
CAUTION
WARNING
, the protective earthing conductor
2
Hardware Installation Manual, 2010-07-02, A5E02923635A AB
Power Module PM230 IP55