One example would motor with frequency
converter.56
Table 3. This often causes high currents flow through the cable sheaths.
We differentiate between
• Galvanic coupling:
Galvanic coupling connectors occurs mainly the earth circuit. Thus, line-
conducted interference can transmitted.3 Transmission Paths
Coupling mechanisms with connectors:
We define the term coupling the way electromagnetic interference
influences (pre-assembled) connector. For example,
the electrical conductor can the wall the switching cabinet. Electrostatic discharges (ESD)
Static converters
Switching high-voltage networks
Devices equipped with clock frequency
generators (PCs, PLCs, etc.6.
. This changing magnetic field produces
an interference voltage.
• Inductive coupling:
A variable current flow through the housing, the cable gland and the cable
screening generates magnetic field.5:
Functional sources Non-functional sources
Communications transmitters Automotive ignition systems
Generators for industrial medical
applications
Fluorescent lamps
Mobile phones Welding fixtures
Radar position finding Connector contacts
Material processing Relays and contactor coils
Microwave ovens, etc. All earth
wires pre-assembled cables are connected via common electrical
conductors the earth potential and subsequently the PE.)
Abrupt changes voltages and currents
3
