TSA (FTA950 Assembled with Electric Controllers)


TSA (FTA950 Assembled with Electric Controllers)



Emerson Network Power > CALA > Products > By Type > Fire Pump Controllers > Power Transfer Switches > TSA (FTA950 Assembled with Electric Controllers)

Firetrol® power transfer switches are available completely assembled with Firetrol electric fire pump controllers – full voltage or reduced voltage types. The entire package of power transfer switch and controller is completely factory assembled, wired, tested and shipped as a complete unit for easy field connection to the power sources and the fire pump motor. The power transfer switch and the electric fire pump controller are assembled in separate but connected enclosure compartments. All wiring between the two enclosures in completed by Firetrol.

The power transfer switches are listed by Underwriters Laboratories, Inc. for transfer switch service and also meet the requirements of NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection and NFPA 70, National Electrical Code. The automatic/manual power transfer switches are listed by Underwriters Laboratories, Inc. under UL-1008, Automatic Transfer Switches, as well as UL-508, Industrial Control Equipment.

The following are included as standard with each transfer switch:

  • Emergency power source disconnect switch sized for connected motor horsepower and voltage
  • Fire pump circuit breaker
  • Mark II monitors for overcurrent tripping (non-thermal) of circuit breaker and alarm indicator for phase failure/phase reversal
  • 3-pole, double throw transfer switch mechanism, electrically operated, mechanically held
  • ASCO® Group 5 Control module providing for the following:
    -Door mounted operator interface panel with 4 line LED display
    -In-phase monitor
    -Programmable engine exerciser
    -Transfer switch data logging
    -Differential voltage sensing on all phases of the normal power source
    -Voltage sensing of the emergency power source
    -Frequency sensing of the emergency power source
    -Transfer time delay to compensate for momentary power outages of the normal source
    -Retransfer from emergency to normal source is automatically delayed unless the emergency source fails
    -Cool-down timer for unloaded running of the generator set after retransfer to the normal power source
    -Instantaneous retransfer to normal if the emergency source fails and the normal source is available
    -3 second transfer restart delay to reduce current surges when transferring to or from the emergency source
    -NO and NC engine control contacts to start the generator set when the normal power source fails
  • Transfer Switch Normal LED
  • Transfer Switch Emergency LED
  • Emergency Isolating Switch Open LED
  • Test Selector Switch
  • Transfer By-pass Switch
  • Silence Alarm Pushbutton
  • Emergency Isolating Switch Open and Transfer Switch in Emergency Audible Alarms
  • Output contacts (NO and NC) for Generator Start, Emergency Isolating Switch Open and Transfer Switch position indicators
  • NEMA Type 2 enclosure (IEC IP11)
The following are available as options to FTA950 Power Transfer Switches: (Note: The short circuit current rating for the normal power source and the emergency power source side of the power transfer switch will be the same as the rating of the fire pump controller assembled with the power transfer switch.)
Circuit Breaker Option
-M Standard withstand rating
200-600V - 100,000 Amps, RMS Sym.
-N Intermediate withstand rating
200-600V - 150,000 Amps, RMS Sym.
-P High withstand rating
200-600V - 200,000 Amps, RMS Sym.
-Q Standard intermediate withstand rating
200-480V - 65,000 Amps RMS Sym.
-R Standard low withstand rating
550-600V - 42,000 Amps RMS Sym.

The following are available as modifications to all transfer switches:
Special Enclosures
-T NEMA Type 3R (IEC IP14)
-E NEMA Type 4 (painted steel) (IEC IP56)
-F NEMA Type 4X (#304 stainless steel) (IEC IP 56)
-G NEMA Type 12 (IEC IP52)
Special finish paint—consult factory
Special finish color—consult factory
Anti-condensation Space Heaters
-H 120 Volt space heater
-J 120 Volt space heater with thermostat
-K 120 Volt space heater with humidistat
-L 240 Volt space heater
-M 240 Volt space heater with thermostat
-N 240 Volt space heater with humidistat
-EC Extra contacts for remote indication, transfer switch position
-BX Contacts for remote indication, second utility source phase failure/phase reversal (FTA950 only)
-ED Load shed circuits
-TN As above, with serial communications port
-S As standard with serial communications port
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