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VPx Series – Variable Speed Electric Fire Pump Controllers (VFD)

VPx Series – Variable Speed Electric Fire Pump Controllers (VFD)

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Variable Speed Electric Fire Pump Controllers

  • Designed for use with electric motor driven fire pumps.
  • Incorporates a variable frequency drive (VFD) to control the speed of a fire pump for the purpose of limiting system pressure.
  • Reduces the mechanical stress on both the motor and the equipment.
  • Available in a variety of bypass starting methods.
  • Manufactured in accordance with the NFPA 20 standard and UL listed.

Bypass Starting Methods:

  • Model VPA – Full voltage Across the Line
  • Model VPS – Reduced Voltage Soft Start / Soft Stop
  • Model VPR – Reduced Voltage Autotransformer

Model VPU – Automatic Transfer Switch 

  • 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
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Variable Speed Electric Fire Pump Controllers

  • Designed for use with electric motor driven fire pumps.
  • Incorporates a variable frequency drive (VFD) to control the speed of a fire pump for the purpose of limiting system pressure.
  • Reduces the mechanical stress on both the motor and the equipment.
  • Available in a variety of bypass starting methods.
  • Manufactured in accordance with the NFPA 20 standard and UL listed.

Bypass Starting Methods:

  • Model VPA – Full voltage Across the Line
  • Model VPS – Reduced Voltage Soft Start / Soft Stop
  • Model VPR – Reduced Voltage Autotransformer

Model VPU – Automatic Transfer Switch 

  • 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

Variable Frequency Drive (VFD)

Standard Features

  • NEMA 2 enclosure
  • Micro-processor based
  • Display module and pressure adjustment accessible without opening main door
  • Built in Variable Frequency Drive (VFD)
  • Bypass-Variable-Preset-speed mode selector switch
  • Pressure transducer set (2) for reading of discharge pressure (600psi)
  • Data/Pressure recorder accessible without opening main door
  • Also available with Model VPU automatic power transfer switch.

Manual Operators (Flange Mounted)

  • Single operator for both isolating switch and circuit breaker, door interlocked in the “ON” position complete with interlock defeater screw
  • Emergency manual start handle
  • Start, Normal Delayed Stop, Emergency Instant Stop and Silence/Reset push buttons
  • Bypass-Variable-Preset-speed mode selector switch
  • Visual and audible indicators:
    • Bypass Mode red pilot light
    • VFD Failure red pilot light
    • Buzzer for Bypass Mode and VFD Failure

Electrical Features

  • Molded case isolating switch
  • Molded case circuit breaker
  • Built In Variable Frequency Drive (VFD)
  • Line fuses for VFD protection (spare fuses included)
  • Line and load contactors for VFD isolation
  • Across the line or reduced voltage by-pass contactor
  • 5% impedence line reactor for VFD
  • 3 phase voltage surge suppressor

Control Features

  • Micro-processor logic based
  • Locked rotor protection
  • Provision for remote or deluge valve start
  • Automatic start sequence
  • Manual and emergency start
  • Sequential start timer
  • Weekly test setting

Individual dry alarm contacts DPDT:

  • Power or phase failure and/or circuit breaker in open position DPDT
  • Trouble
  • Phase reversal
  • Bypass mode
  • Pump run
  • VFD  failure
  • Built to NFPA 20 (latest edition)
  • Underwriters Laboratory (UL)
    • UL218 – Fire pump controllers
    • UL 1008 – Automatic power transfer switches for fire pump controllers

Annunciator and LCD Display

  • Phase sequence / loss monitoring & alarms
  • Individual phase-to-phase voltage indication
  • Individual phase current indication
  • Elapsed run time
  • Over & under current visual indication
  • Over & under voltage visual indication
  • Fail to start visual indication
  • Phase loss visual indication
  • Phase unbalance visual indication
  • Power available LED
  • Phase reversal LED
  • Low system pressure LED
  • System trouble LED
  • Cut-In & Cut-Out pressure setting
  • System pressure indication
  • Pressure recording
  • Alarm & events recording
  • Enclosure Protection Rating
    • Standard: NEMA 2 Assembly
    • Optional:
      • NEMA 12
      • NEMA 3
      • NEMA 3R
      • IP54
  • Accessories
    • Keylock handle
    • Bottom entry gland plate
    • Lifting lugs
  • Paint Specifications
    • Red RAL3002
    • Powder coating
    • Glossy textured finish

Model VPU – The transfer switch assembly includes:

  • Surge suppression
  • Disconnecting means
    • Single operator for both isolating switch and circuit breaker
    • Door interlocked in the ON position
  • Locked rotor protector
  • Visual indications
    • Alternate (emergency) isolating switch in the OFF position
    • Alternate (emergency) voltage phase to phase
    • Transfer switch in normal position
    • Transfer switch in Alternate (emergency) position
  • Transfer switch test pushbutton
  • Bypass for re-transfer and generator shutdown
  • Electrically operated and mechanically held in the normal or alternate position
  • Provision for manual operation

Time delays:

  •  To override momentary normal power outages before transfer to the alternate (emergency) power source. Factory set at 3 seconds.
  • To retransfer to normal power. Instantaneous retransfer in case of alternate (emergency) power failure. (Factory set at 5 minutes.)
  • To allow engine generator cool-down after retransfer to normal source. Factory set at 5 minutes.

Voltage, frequency and phase reversal sensing:

  •  Voltage sensing on all phases of normal power, set at 85%. A voltage below this value or phase reversal initiates transfer to the alternate (emergency) power source.
  •  Alternate (emergency) power source voltage and frequency sensing set at 90%. A voltage or frequency above this value initiates transfer to the alternate (emergency) power source.
  •  Voltage sensing on all phases of normal power, set at 90%. A voltage above this value initiates retransfer to normal power.

Remote alarm contacts

  • Emergency power isolating switch in the OFF position
  • Transfer switch in normal position
  • Transfer switch in emergency position

Generator start connection

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Available Models
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