Connecting The Line Supply And Motor - Siemens SINAMICS G120 CU230P-2 HVAC Operating Instructions Manual

Installing
3.3 Installing Power Module
3.3.3

Connecting the line supply and motor

Preconditions
Once the inverter has been properly installed, the line and motor connections can now be
established. The following warning information must be observed here.
Line and motor connections
The inverter must be grounded on the line supply and motor side. If the inverter is not
correctly grounded, this can lead to extremely hazardous conditions which, under certain
circumstances, can result in death.
The device must be disconnected from the electrical power supply before any connections
with the device are established or in any way altered.
The inverter terminals be at hazardous voltages even after the inverter has been switched
off. After disconnecting the line supply, wait at least 5 minutes until the device has
discharged itself. Only then, carry out any installation and mounting work.
When connecting the inverter to the line supply, ensure that the motor terminal box is
closed.
Even if the LED or other indicators do not light up or remain inactive when a function is
switched from ON to OFF, this does not necessarily mean that the unit has been switched
off or is de-energized.
The short-circuit ratio of the power supply must be at least 100.
Make sure that the inverter is configured for the correct supply voltage (the inverter must
not be connected to a higher supply voltage).
If a residual-current circuit breaker is installed on the supply side of the electronic devices
to protect against direct or indirect contact, only type B is permissible. In all other cases,
other protective measures must be implemented, such as creating a barrier between the
electronic devices and the environment by means of double or reinforced insulation or
isolating them from the supply using a transformer.
CAUTION
Supply cable and signal lines
The signal lines must be routed separately from the supply cables to ensure that the
system is not affected by inductive or capacitive interference.
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WARNING
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD