AEG THYRO-A, Operating Instructions Manual

Page: 19 / 108

19
EN
3.1.2 Phase angle principle VAR (only A 1A)
In this operating mode, the sinus wave of the mains voltage is shifted.
The shift depends on the setpoint value. Characteristic of this opera-
ting mode are the high control dynamics.
When phase angle control VAR is used, harmonics of the mains
voltage form. These can be compensated for with various types of
circuit.
3.1.3 Half wave switch principle QTM (Quick Takt Mode only 1A)
QTM is the applied for a patent fast operating mode which works on
the half wave switch principle. QTM is suitable for ohmic loads. De-
pending on the predetermined setpoint value, mains half waves are
switched. DC components are avoided for the phase duration.
The fast phase control is particularly suited for IR beams as an
alternative to phase-angle control. When using several controllers it is
possible, by synchronization, to keep the mains feedback small.
3.2 Setpoint processing
Fig. 1: Setpoint inputs and effective setpoint
The user can adapt the setpoint signal to process controllers or to
the automation system (see page 43, Live zero and setpoint input
range).
refer to chapter 2.6