GS1 Series AC Drive User Manual
3–9
Chapter 3: Keypad Operation and Quickstart
Example 2: Variable torque (e.g. fans, centrifugal pumps, etc.)
In this example, the AC drive needs to operate a motor that is connected to a centrifugal
pump. As in Example 1, we will make a list of the needs for the application in order to
decide which parameters need modifications.
Application Needs
•The AC drive must control a 208V, 1/2HP motor. The AC drive model we will
be using for this application is a GS1-20P5. An example of the motor
nameplate is shown below.
•The maximum speed for the motor is 3600 RPM.
•The motor should accelerate to maximum speed in 20 seconds.
•The motor should coast to stop when operation is terminated.
•The motor will be turning a centrifugal pump.
•The operation of the motor (start, stop, etc.) will be controlled by the GS1
digital keypad.
•The frequency of the AC drive will be determined by the GS1 keypad
potentiometer.
•The display of the AC drive should default to output current (A) when running.
Parameter Setup
In order to meet the needs of this application, the parameters should be set as follows:
Motor Nameplate Voltage Setting: 208
Range: 200V series: 200/208/220/230/240 Default Setting: 240
This parameter setting is determined by the motor nameplate.
Motor Nameplate Amps Setting: 2.5
Range: Drive Rated Amps x .3 to Default Setting: Drive Rating (A)
Drive Rated Amps x 1.0
This parameter setting is determined by the motor nameplate.
0-01
0-00
INVERTER DUTY MOTOR
HP 0.5 Volts 208 PHASE 3 TYPE P
RPM 3525 AMPS 2.5 HZ 60 SF 1.15
DESIGN B AMB 40°C INSUL CLASS F
DUTY CONT ENCL TEFC CODE K
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