VPx Series

Variable Speed Electric Fire Pump Controllers (VFD)

Variable Speed Electric Fire Pump Controllers
Tornatech Variable Speed Electric Fire Pump Controllers incorporate a variable frequency drive (VFD) to control the speed of a fire pump for the purpose of limiting system pressure.

Model VPA - Across-the-line    

  • Limits the discharge pressure of the fire pump to the sprinkler system.
  • Reduces the mechanical stress on both the motor and the equipment driven by the motor.
  • Provides an initial inrush current of 125-150%, making it the softest available starting method.
  • Assists in reducing water hammer.                                 

Model VPR - Autotransformer     

  • The variable speed drive limits the discharge pressure of the fire pump to the sprinkler system.
  • An autotransformer is utilized to supply reduced voltage to the motor.
  • After a time delay, the autotransformer is shunted out and the motor is connected to full voltage by a closed transition switching sequence.
  • A multi-connection motor is not required. Only three conductors are required between the controller and the motor.

 Model VPS - Soft Start / Soft Stop   

  • The variable speed drive limits the discharge pressure of the fire pump to the sprinkler system.
  • A solid-state starter is utilized to supply a step-less ramp up voltage to the motor until the motor reaches its full speed. At that time, a fully horsepower rated by-pass contactor is energized connecting the motor directly to full voltage and eliminating all heat loss within the solid-state starter

Model VPU - Automatic Power Transfer Switch (In addition to main fire pump controller) 

  • Required if normal utility power is not reliable
  • Housed in a barriered compartment or in a separate enclosure attached to the fire pump controller
  • Listed and Approved for fire pump service
  • Equipped with a transfer switch TEST pushbutton

Certifications

Our products respect all of these norms.

  • NFPA
  • CULUS
  • CE - Optionnal

Variable Frequency Drive (VFD)
Limits the discharge pressure of the fire pump to the sprinkler system

  • Single operator for both isolating switch and circuit breaker
  • Surge arrestor
  • Start, Delayed Stop, Instant Stop and Silence/Reset pushbuttons
  •  Variable-Preset- By-pass speed mode selector switch
  • Run test push button
  • Remote start / deluge valve start provision
  • Emergency start handle
  • Locked rotor protector
  • Phase reversal indication
  • Alarm contacts for remote indication
  •  Pressure transducer (2) for fresh water application externally mounted with protective cover
  •  Line fuses for VFD protection
  • Line and load contactors for VFD isolation
  • 5% line reactor

Visual and Audible Indicators

  • By-pass mode pilot light
  • VFD Failure pilot light
  • Buzzer for by-pass mode and VFD Failure

Individual dry alarm contacts 8A. 250 V.AC for:

  • Power or phase failure and/or circuit breaker in open position DPDT
  • Trouble (alarm conditions) DPDT
  • Phase reversal DPDT
  • By Pass mode DPDT
  • Pump run 1 N/O- 1N/C
  • VFD  failure DPDT

Audible Alarm

  • 4” alarm bell - 85 dB at 10ft. (3m)

 Withstand rating (short circuit current):

  Standard Optional
208V. to 480V. 100,000A. 150,000A.
600V. 50,000A. 100,000A.

 

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