Siemens Sinamics PM250 - Harmonics

Technical specifications
7.6 Electromagnetic compatibility of the inverter
PM250 Power Module
66 Hardware Installation Manual, 01/2016, A5E36265179B-AA
First environment - category C2
Immunity
With respect to their immunity, the inverters are suitable for the first environment, Category
C2.
Emitted interference
●
Low-frequency, cable-conducted interference voltages (harmonics)
Your line supply defines as to whether the inverter can satisfy the requirements of the first
environment, Category C2.
In this regard, contact your power supply utility.
A table showing the typical harmonic currents of the Power Modules can be found in
section Harmonics (Page 66).
●
High-frequency cable-conducted interference voltages
:
The limit values for the first environment, Category C2, are maintained under the
following preconditions:
– You are using an inverter with an integrated filter
– You are using a shielded motor connection cable with low capacitance
– The current does not exceed the value of the LO input current (see Power-dependent
data (Page 58))
– The pulse frequency does not exceed 4 kHz
– The motor cable is shorter than 25 m.
– The installation must be carried out by an expert who has the necessary experience
for installing and/or commissioning power drives, included the associated EMC
aspects.
●
High-frequency emitted interference
When installed professionally in accordance with EMC guidelines, the inverters fulfill the
requirements of the standard in relation to category C2.
7.6.2
Harmonics
Harmonic number
5th
7th
11th
13th
17th
19th
23rd
25th
Current as a % for FSC
1)
54
39
11
5.5
5
3
2
2
Current as a % for FSD … FSF
2)
37
21
7
5
4
3
3
2
1)
Typical harmonic currents as a % referred to the LO input current for U
K
1 %
2)
Typical harmonic currents as a %