Frick QUANTUM - Motor Control

FRICK
®
QUANTUM™ COMPRESSOR CONTROL PANEL S90-010 O
OPERATION Page 25
Motor Control
The following information should be recorded from the
motor nameplate:
• Motor Amps
• Volts
• Service Factor - Note: Not required if using RAM
DBS.
• Horse Power
• CT Factor - The Current Transformer Factor is
printed on the current transformer in the
compressor motor starter. Note: Not required if
using RAM DBS.
To verify that the CT has been sized properly,
use the following equation:
CTF = FLA (Full Load Amps) x Service Factor x
1.1 = Recommended CT (Round up to next
highest 100 Amps)
EXAMPLE: FLA = 182 Amps
SF = 1.0
CTF = (182 x 1.0 x 1.1) = 200.2 >
Round up to 300 [use 300:5 CT]
The following setpoint is required for safe motor operation:
Recycle delay - Each time the compressor is started,
this value will be loaded into the Recycle Delay timer.
This time must elapse prior to allowing the
compressor to restart. The timer will time out while the
compressor is running or stopped since the Recycle
Delay is a start-to-start protection. The Recycle Delay
time is intended to prevent damage to the motor from
successive restarts.
NOTE: Consult Motor Manufacturer for the
recommended duration of the Recycle Delay.
The following setpoints are required for Motor Amps load
control:
High Motor Amps Stop Load - The compressor slide
valve will be prevented from loading until the Motor
Amps is less than this setpoint.
TYPICAL SETTING: Motor Amps Stop Load = FLA x
100%
High Motor Amps Force Unload - When the Motor
Amps is greater than or equal to this setpoint, the
compressor Slide Valve will be forced to unload until
the Motor Amps has dropped by greater than 1% of
this setpoint. For example, if this setpoint were 115
amps, then Force Unload = 115 x .01 = 1.15 amps.
This means that the Slide Valve will be forced to
unload until the Motors Amps has dropped by 1.15
amps.
TYPICAL SETTING: Motor Amps Force UnLoad =
FLA x 105%
High Motor Amps Alarm - If the Motor Amps is
greater than or equal to this setpoint, for the alarm
time delay, an alarm occurs.
High Motor Amps Shutdown - If the Motor Amps is
greater than or equal to this setpoint, for the shutdown
time delay, the compressor will shut down.
High Motor Amps Alarm Delay - The minimum time
in seconds that the Motor Amps is greater than or
equal to the High Motor Amps Alarm setpoint before
notification of the alarm.
High Motor Amps Shutdown Delay - The minimum
time in seconds that the Motor Amps is greater than
or equal to the High Motor Amps Shutdown setpoint
before the compressor will shut down.
Low Motor Amps Shutdown – This setpoint is used
to determine if the coupling has broken. If the Motor
Optional
Setup Keys
Optional
Setup Key