Electromagnetic Compatibility Of Variable-Speed Drives - Siemens SINAMICS G120 Hardware Installation Manual

7.8

Electromagnetic compatibility of variable-speed drives

EMC (electromagnetic compatibility) means that the devices function satisfactorily without
interfering with other devices and without being disrupted by other devices. This is true when
the emitted interference (emission level) and the interference immunity are matched with each
other.
The product standard IEC/EN 61800-3 describes the EMC requirements placed on "Variable-
speed drive systems".
A variable-speed drive system (or Power Drive System PDS) consists of the inverter as well
as the associated electric motors and encoders including the connecting cables.
The inverter comprises the Control Unit and Power Module.
The driven machine is not part of the drive system.
Note
PDS as component of machines or systems
When you integrate PDS into machines or systems, additional measures may be required so
that the product standards of these machines or systems is complied with. The machine or
system builder is responsible for taking these measures.
Environments and categories
Environments
IEC/EN 61800-3 makes a distinction between the first and second environments - and defines
different requirements for these environments.
● First environment:
Residential buildings or locations at which the drive system is directly connected to a public
low-voltage supply without intermediate transformer.
● Second environment:
All locations that are connected to the public grid through their own, dedicated transformer.
These are essentially industrial plants and systems.
Categories
IEC/EN 61800-3 makes a distinction between four drive system categories:
● Category C1:
Drive systems for rated voltages < 1000 V for unrestricted use in the first environment
● Category C2:
Stationary drive systems for rated voltages < 1000 V for operation in the second
environment.
The drive system must be installed by appropriately qualified and trained personnel.
Additional measures are required for operation in the first environment.
Power Module PM230, IP20 / Push-through technology (PT)
Hardware Installation Manual, 08/2016, A5E34331322B AB
7.8 Electromagnetic compatibility of variable-speed drives
Technical specifications
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