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

• ViZiTouch V2.1 operator interface
  • Voltage and amperage display
  • Constant pressure output set-point display
  • System pressure, cut-in and cut-out display
  • VFD Hertz display
  • Pressure and event recorder

• 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