Tornatech GPX User Manual

5
Electric fire pump controllers are designed to start an electric motor driven fire pump. It can either start the fire
pump manually through the local start pushbutton or automatically through the sensing of a pressure drop in the
sprinkler system. The fire pump controller is supplied with a pressure transducer. The fire pump can be stopped
manually with the local stop pushbutton or automatically after the expiration of a field programmable timer. In both
cases, stopping is only allowed if all starting causes have disappeared.
Types of Electric Fire Pump Controllers
FIRE PUMP CATALOG NUMBER
MODEL No. EXAMPLE: GPA - 208 / 50 / 3 / 60
Model Prefix: GPA
Voltage: 208 V
HP Rating: 50 HP
Phase: 3
Frequency: 60 Hz
ACROSS-THE-LINE STARTER
MODEL GPA:
This model is intended to be used where the local utility or the capacity of the power source permits across-
the-line starting.
Full voltage is applied to the motor as soon as the controller receives a start command.
REDUCED VOLTAGE STARTERS
These models are intended to be used where the local utility or the capacity of the power source does not permit full
voltage starting.
In all the reduced voltage models, the manual “EMERGENCY RUN” device will initiate across-the-line starting.
MODEL GPP: PART WINDING STARTER
This model requires the use of a motor with two separate windings and 6 power conductors between the
controller and the motor.
Upon a start command, the first winding is connected to the line immediately. The second winding is
connected to the line after a very short time delay.
MODEL GPR: AUTOTRANSFORMER STARTER
This model does not require a multi-connection motor. It only requires 3 conductors between the controller
and the motor.
Upon a start command, 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.
MODEL GPS: SOLID STATE STARTER
This model does not require a multi-connection motor. It only requires 3 conductors between the controller
and the motor.
Upon a start command, 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.
This controller also features a soft motor stopping mode and a hard stop mode. For a hard stop, hold the
stop pushbutton until the motor stop.
Introduction

Tornatech GPX Specifications

General

Brand	Tornatech
Model	GPX
Category	Controller
Language	English