Inductive Load – Select your Load Connection

PURE RESISTIVE LOAD ON SECONDARY:
Pure Resistive Elements on the Secondary of 1PH Transformer

Pure Resistive Elements Secondary 1PH Transformer

Select
Pure Resistive Load on Secondary of 3PH Transformer

Pure Resistive Load Secondary 3PH Transformer

Select
COLD RESISTANCE LOAD ON SECONDARY:
MoSi2 Element 1PH Load

MoSi2 Element 1PH Load

Select
MoSi2 Element Delta Star No Neutral, Star with Neutral, With or Without 3PH Transformer

Delta/Star No Neutral,Star Neutral, With W/out 3PH Transf.

Select

LOAD ON SECONDARY OF TRASFORMER
Transformer have an inrush current on start up. For this kind of application is required special SCR Power Controller. For 1PH loads we suggest you REVO C 1PH or REVEX 1PH for small current. REVO C 3PH is used for three phase transformer. Close examination of the transformer application needs to be made a the typical inrush current, when switched on. This over-current will have the result to damage Fuses or Thyristor.
To avoid the peak current we suggest you to use the following techniques:
1) Phase angle firing with soft start and current limit. This type of firing can be used with all types of loads.
  • Normal resistance.
  • Cold resistance (Example: Kanthall Super elements)
  • Transformer coupled with normal or cold resistance.
  • With cold resistance use I feed-back.
2) Burst firing using the Delay Triggering (DT) technique. To avoid magnetic circuit saturation, the thyristor unit will switch OFF when the load voltage is negative and switch ON again when positive. The unit also has an adjustable delay on voltage zero crossing. In this way it is possible to switch ON when current is zero. This Firing technique can only be used with normal resistance, where its resistive value remains constant with temperature variations.
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