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Three-phase industrial power controller features 'soft start'

14 November 2015

Powerstax has introduced the DTC 352 dual control channel, three-phase thyristor controller suitable for use in electro-chemical processes and the control of motors, heaters and traction equipment.

The DTC 352 is a dual channel three phase thyristor controller allowing closed loop control of both output voltage and current on either primary or secondary thyristors. Its robust control circuit allows it to operate from a range of ac power supplies including generators.

It can be used either as an open loop controller or as a two-channel closed loop controller to control two parameters (feedback signals) simultaneously.  For two channel control, when one of the two feedback signals reaches its pre-set value, the DTC 352 will control to this feedback signal at the set value and it will self-adjust to compensate for any mains supply and load variation.

External logic control functions are available to start and stop the output current and voltage with automatic soft-start, minimising inrush current.

The current control feature of the DTC352 provides inherent output current limiting allowing the output current to be limited to a pre-set safe level to protect the load from over-current.  This feature is recommended for use with high inrush current loads.


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