JUMO 709062 TYA 202 - Three-Phase Power Controller Operating Manual - Manual (Page 19)

2012-12-31/00561073 [SCR power switch TYA202] 17
2 Installation
2.1.2 Filtering and interference suppression
To prevent radio-frequency interference, such as occurs with a soft start in
phase angle control, electrical apparatus and systems must have interference
suppression implemented.
The control electronics of the SCR power controller correspond to the EMC re-
quirements of EN 61326.
However, electrical modules such as SCR power controllers do not have any
purpose by themselves. They provide a function as part of a complete system
or installation.
Where applicable, the entire load circuit of the power controller must also have
suitable interference suppression filters fitted by the system provider.
There are a number of specialist companies that provide appropriate ranges of
filters to deal with any interference problems. Such filters are normally sup-
plied as complete modules that are ready to be connected.
2.1.3 Permissible load current depending
on the ambient temperature and the installation height
Ambient tem-
perature
45 50 60
75
20
200
T/°C
150
Load current in A
Reduction at a temperature of 45 °C:
2 %/kelvin
70 % 250
100
50