2 Installation
16 2011-07-01/00561073 [SCR Power Controller TYA202]
h Load leads and cables for control inputs should be routed separately as far
as possible.
h Wire up the connections from supply line – SCR power controller – load as
per the wiring diagram, and check them.
Phase position The voltage supply for the control electronics and the load voltage
must have an identical phase position.
Control inputs The terminal strips for the control connections (inputs and outputs) are de-
signed for safety separation from the supply line input (SELV). In order not to
impair this safety separation, all connected circuits must also have safety sep-
aration. The auxiliary voltages which are required must be safe extra-low volt-
ages (SELV).
2.1.1 Ambient conditions
Incorrect use The device is not suitable for use in potentially explosive atmospheres.
Vibration, dust
and soiling
Ensure that the installation site is free from vibrations, aggressive media and
dust so that the ventilation slits do not become clogged.
Climatic
conditions
- Relative humidity: 5...85 % without condensation (3K3 as per EN 60721)
- Ambient temperature range: 0 ... 45 °C (3K3 as per EN 60721-3-3)
- Storage temperature range: -30...70 °C Class 1K5
Avoid addition-
al heat
sources
h Ensure that the ambient temperature at the installation site is not increased
by other heat sources or heat accumulation.
- Do not install the controller too near to the heating process (kiln).
- Avoid exposure of the controller to direct sunlight.
Power dissipa-
tion
Occurs in the form of dissipated heat at the cooling body of the master and
slave device and has to be dissipated at the place of installation (e.g. in the
switch cabinet) according to the climatic conditions.
2.1.2 Filtering and interference suppression
In order to prevent radio-frequency interference, such as would occur with soft
start in phase-angle mode, electrical apparatus and systems must have inter-
ference suppression implemented.
The control electronics of the SCR power controller meets the EMC require-
ments of EN 61 326.
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 have
suitable interference suppression filters fitted in addition by the system provid-
er.
There are a number of specialist companies that provide appropriate ranges of
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