The 902
and 903 Series three phase SCR controllers are designed to function as a
master/slave system. The Master or Slave will be identified as either a (902
Series) two triac or (903 Series) three triac controller, which may be
connected in the line or in the Delta or Wye respectively.
Each three phase Master or Slave requires a
separate three phase circuit connected to its specific KW load. A 901-D Series Logic is mounted on the
master for driving the power switch sections.
Slave controllers used "stand alone", without a Master
controller function as a "zero firing" three phase solid state
contactor.
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