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

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

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

• Standard: NEMA 2 Assembly
• Optional:
  • NEMA 12
  • NEMA 3
  • NEMA 3R
  • NEMA 4
• Accessories
  • Keylock handle
  • Bottom entry gland plate
  • Lifting lugs
• Paint Specifications
  • Red RAL3002
  • Powder coating
  • Glossy textured finish

• 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