Leroy Somer VTU.N Speed Controller Installation and maintenance manual

Below you will find brief information for Speed Controller VTU.N. The VTU.N is a unidirectional, three-phase speed controller for DC motors. It allows operation in the two quadrants of the torque speed diagram. The VTU.N is a full wave, thyristor speed controller for separately excited DC motors and has a compact design. The VTU.N is available in nine calibers from 38 to 1200 A. It is flexible and has a high overcurrent capability for a short period. The VTU.N can be controlled by a DC tachometer or by armature regulation. The VTU.N has a number of safety devices such as a current limitation, a speed loop gain setting and an overload protection. These features make the VTU.N ideal for use in a variety of industrial applications.

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VTU.N Speed Controller Installation Manual | Manualzz

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Key features

  • Full Wave Thyristor Speed Controller
  • Unidirectional Three-Phase
  • Compact Design
  • Nine Calibers from 38 to 1200 A
  • High Overcurrent Capability
  • Control by DC Tachometer or Armature Regulation
  • Safety Devices: Current Limitation, Overload Protection
  • Speed Loop Gain Setting
  • Ideal for Industrial Applications
  • Flexible Starting

Frequently asked questions

The VTU.N is a speed controller for DC motors. It regulates the speed of the motor

The VTU.N is available in nine calibers from 38 to 1200 A. The maximum current output depends on the caliber you choose.

The VTU.N has a safety feature that limits the current to 1.6 times the rated motor current for 10 seconds. After this, the controller locks.

You can set the maximum motor speed using the R107 potentiometer. You can use a DC tachometer or armature regulation to adjust the speed.
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