Operating instructions

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1.3 Type designation
The type designation of the Thyristor Power Controllers is derived from the construc-
tion of its power section.
Thyro-A 1A Power Controller with single phase power section
suited for single phase loads
Thyro-A 2A Power Controller with double phase power section
suited for three phase operation in
three phase saver circuit
Example
Thyro-A 1A Power Controller with single phase power section
...400- with 400 Volt type voltage
...280 with 280 Amp type current
H with integrated semi-conductor fuse
F with ventilator (only 280 Amp types)
1 designation Thyro-A, 2002 series
The complete type range can be found in chapter 9, TYPE OVERVIEW.
➜
2. Functions
To enable Thyro-A to adjust optimally to the desired application, it is equipped with
a wide range of functions. These are described below. Further functions are possible
by applying Thyro-A within a bus system. See also chapter 5 INTERFACES.
2.1 Operating modes
For adjustment to different electrical loads, the most favourable operating mode can
be chosen.
Full wave switch TAKT (for 1A, 2A)
Depending on the prescribed set point, the mains voltage is periodically switched. In
this operating mode almost no harmonics are created. Whole multiples of the mains
periods are switched, thus avoiding d.c. components. The full wave switch mode is
especially suited for loads with thermal inertia. Depending on the function angle
1. half wave, the phase frequency is adjusted independently to 5 or 50 mains
periods = To.
The phase operation creates minimal mains reactions. Should there be a flicker, this
can be minimized with the aid of the mains load optimization.