2011-07-01/00561073 [SCR Power Controller TYA202] 37
3 Electrical Connection
3.3.1 Three-phase economy circuit, Master/Slave for resistive loads in star,
delta circuit or transformer loads (resistive-inductive)
Prerequisites The devices have to have the same type code and the same device software
version to allow the Master/Slave operation.
The two devices are connected by a max. 30 cm patch cable.
The figure shows the wiring of a TYA 202 that is available completely installed
and configured at the factory but behaves identically to two individual TYA 201
devices in Master/Slave mode.
Operating
method
In the standard version, the master-slave economy circuit operates with a U
2
control. The control electronics of the master power controller perform the ac-
tual power control function, and drive the slave unit in synchronization. This
makes it possible to drive transformer loads. The combination of the fixed cy-
cle time and the U
2
control makes it possible to achieve good voltage regula-
tion for the individual load resistances, even in the event of a partial load fail-
ure.
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