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Preventer - SP + Auto (DOL Gold)

Magnum Single Phasing Voltage Sensing Preventor with Auto Start Unit is a powerful electronic circuit which prevents three phase operated electrical machines from single phase cut off, phase sequence reversal and unbalanced voltage. It can be used for any three phase motor of any HP.


  • Electrical Panels.
  • Compressor Motors.
  • Submersible Pumps.
  • Any other three phase application

Salient Features:

  • This is a microcontroller based product which switches on three phase motor automatically & also protects it against under voltage, wrong phase sequence and phase failure condition.
  • LED is provided to check the status of incoming power supply.
  • Longer working life, in lieu of finest raw materials usage.
  • Option to switch on the motor automatically (to start the motor automatically when power resumes).


  • Protects the motor from

a) Single Phasing

b) Reverse Phasing

c) Unbalanced Supply Voltage

  • Low/High Voltage Cut-off Option to automatically switch on the panel after power supply resume.

Preventer - SP + Auto  (DOL Gold) Click here to Zoom

Preventer - Dry Run

Preventer - Dry Run

Bakelite Auto Start Unit

Bakelite Auto Start Unit

Electronic Auto Start Unit

Electronic Auto Start Unit

Preventer - Toroidal

Preventer - Toroidal

Preventer - SP + Auto (DOL)

Preventer - SP + Auto  (DOL)

Preventer - SP + Auto (Star-Delta)

Preventer - SP + Auto  (Star-Delta)

Contact Us

Magnum Switchgear, Bengaluru
Mr. Vikas Kataria
No. 40, 2nd Main Road, Pete Chenappa Industrial Estate, Kamakshipalya, Magadi Road
Bengaluru - 560079, Karnataka, India

Contact via E-mail

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