Siemens SINAMICS G120P Hardware Installation Manual page 59

Figure 4-10
Fitting ferrite rings to the motor and mains supply cables
Motor cable blue ferrite ring
It is necessary to fit the blue ferrite ring to the motor power cable on the PM230 frame sizes
A to C (0.37 kW ... 15.0 kW) with an integrated B class filters to ensure it fulfills the EMI C1
standard for conducted emissions.
The blue ferrite ring must be fitted between the motor power cable terminals and the
screening plate of the power module.
The ferrite rings should not be used on cable lengths greater than 25 m (80 ft).
The ferrite rings required for PM230 FSA to FSC with integrated Class B filters are supplied
with the product.
Mains supply cable ferrite rings
It is necessary to fit the gray ferrite rings to the mains supply cable of the PM230 frame size
B (4.0 kW ... 7.5 kW) and frame size C (11.00 kW ... 15.0 kW) with an integrated B class
filter to ensure it fulfills the EMI standard for radiated emissions.
The gray ferrite rings must be fitted between the terminals and the screening plate on the
mains supply cable.
The gray ferrite rings are supplied with the product.
The correct fitting of the ferrite rings is shown in the figure below.
PM230 Power Module IP55
Hardware Installation Manual, 11/2014, A5E35319202B AA
Control Unit cable shielding, FSA ... FSC
Connecting
4.9 EMC guidelines
59