Mains And Motor Connection - Siemens SINAMICS G120P Hardware Installation Manual

Connecting

4.1 Mains and Motor Connection

Operation with Residual Current Devices (RCD) or Monitoring (RCM) - only for FSA / FSB
The inverter can cause a DC current in the protective earthing conductor.
If an RCD - residual current-operated protective device (also referred to as an ELCB or a
RCCB) or an RCM - residual current-operated monitoring device - is fitted for protection in
case of direct or indirect contact, the inverter will operate without nuisance tripping provided
that:
 An RCD/RCM type B superresistant is used (e.g. a SIQUENCE circuit breaker by
 The trip limit of the RCD/RCM is 300 mA
 The neutral of the supply is grounded
 Only one inverter is supplied from each RCD/RCM
 The output cables are less than 50 m screened
If no RCD/RCM is used, the touch protection can be achieved by double insulation or by
separating the inverter from the mains system using a transformer.
Note
Ensure that the appropriate circuit-breakers or fuses with the specified current rating are
connected between the power supply and the inverter. The technical data contain
information about the circuit breaker and fuses (see Specifications).
4.1 Mains and Motor Connection
Inverter terminal layout see Mains and Motor Terminals (Page 26).
For all connections carefully observe the regulations for EMC compliant connection
(Page 27).
Mains connection
If available, open the terminal covers of the inverter.
Connect the protective conductor of the power supply cable to terminal PE of the inverter.
Connect the power supply cable to terminals U1/L1, V1/L2 and W1/L3.
Note
Unfiltered inverters can be connected to grounded (TN, TT) and non-grounded (IT) power
supply systems.
Inverters with a line filter - internal or external - are suitable only for connection to TN power
supply systems.
24
CAUTION
Siemens).
Power Module PM230, IP20 / Push through
Hardware Installation Manual, 03/2012, A5E03448282B AA