●
IEC 61000-4-6 Test of Immunity to Conducted Disturbances, Induced by
High Frequency Fields
●
IEC 61000-4-8 Power Frequency Magnetic Field Immunity Test
●
IEC 61000-4-11 Voltage Dips, Short Interruptions and Voltage Variations
Immunity Test
All the international Standards listed here are also available as European
Standards. The Product Standard IEC 61131-2 demands testing to these
Standards and also defines the severity level.
Technical systems as interference sinks
In the case of functional interference, EMC problems first arise at interference
sinks. The following interference sinks can be identified dependent on the de-
gree of immunity to electromagnetic influences:
Immunity Interference sinks
max
min
Transformers
Circuit breakers, contactors
Relays
Power transistors
Transistor circuits
Integrated switching circuits
Tab.18-1:
Examples for technical systems as interference sinks
Control systems without integrated switching circuits are unthinkable and
would therefore not be sufficiently immune without suitable EMC measures.
Coupling paths
The transfer of interference signals from an interference source to an interfer-
ence sink can take place via various coupling paths.
Coupling paths very often consist of two or more parallel lines running closely
together. The coupling is a field coupling that takes place at low frequencies
either via the electrical field (capacitive coupling) or via the magnetic field (in-
ductive coupling).
At high frequencies and with corresponding expansion of the parallel running
lines one speaks about an electromagnetic coupling due to close linking of both
field types.
Appendix: Electromagnetic Compatibility
KeTop T10
© KEBA 2014
Project engineering manual V1.02
74
Содержание Kemro KeTop T10
Страница 1: ...Kemro KeTop T10 Project engineering manual V1 02 Translation of the original manual ...
Страница 4: ......
Страница 8: ......