5
Mechanical installation
These notes are intended for all who install the thyristor power controller. Handle the unit carefully to avoid
damage and injury.
DCT880 sizes T4 and T5: The thyristor power controller is heavy. Do not lift it alone. Do not
lift the unit by the front cover. Place units T4 and T5 only on its back.
Make sure that dust from drilling does not enter the thyristor power controller when installing.
Electrically conductive dust inside the unit may cause damage or lead to malfunction.
Ensure sufficient cooling.
− Do not fasten the thyristor power controller by riveting or welding.
Operation
These warnings are intended for all who plan the operation of the thyristor power controller or operate the
thyristor power controller. Ignoring the instructions can cause physical injury or death and/or damage to the
equipment.
Before adjusting the thyristor power controller and putting it into service, make sure that all
connected equipment is suitable for operation throughout the voltage/current range provided
by the thyristor power controller.
Do not control the connected equipment with the disconnecting device (disconnecting
mains); instead, use the control panel keys and , or commands via the I/O board of
the thyristor power controller.
Mains connection
You can use a disconnect switch (with fuses) to disconnect the electrical components of the
thyristor power controller from the mains for installation and maintenance work. The type of
disconnect switch used must be as per EN 60947-3, Class B, so as to comply with EU
regulations, or a circuit-breaker type which switches off the load circuit by means of an
auxiliary contact causing the breaker's main contacts to open. The mains disconnect must be
locked in its "OPEN" position during any installation and maintenance work.
EMERGENCY POWER OFF buttons must be installed at each control desk and at all other
control panels requiring an emergency off function. Pressing the Stop button on the control
panel of the thyristor power controller will not cause an emergency off by the thyristor power
controller and it will not disconnect the thyristor power controller from any dangerous
potential.
To avoid unintentional operating states, or to shut the unit down in case of any imminent
danger according to the standards in the safety instructions it is not sufficient to merely shut
down the thyristor power controller via signals Run or Enable or from control panel or PC
tool.
Intended use
The operating instructions cannot take into consideration every possible case of
configuration, operation or maintenance. Thus, they mainly give such advice only, which is
required by qualified personnel for normal operation of the machines and devices in industrial
installations.
If in special cases the electrical machines and devices are intended for use in non-industrial
installations - which may require stricter safety regulations (e.g. protection against contact by
children or similar) - these additional safety measures for the installation must be provided by
the customer during assembly.
When the control location is not set to Local, the Stop key on the control panel will not stop
the thyristor power controller. To stop the thyristor power controller using the control panel,
press the Loc/Rem key and then the Stop key .
Safety Instructions
3ADW000449R0101 DCT880 Service Manual e a
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