Medium Voltage Variable Speed Drive screen
Figure 52: Medium Voltage Variable Speed Drive screen
This screen displays information pertaining to a medium voltage variable speed drive (MV VSD).
For details of MV VSD operation and setpoints, refer to
Medium Voltage Variable Speed Drive – Service
(Form 160.00-M6)
.
Table 83: Display only fields
Field/LED name
Description
Motor Run (LED)
Indicates whether the digital output from the controls is commanding the chiller to
run.
Motor % Full Load Amps
Displays the motor current as a percentage of the Full Load Amps (FLA).
Current Limit Setpoint
Displays the current limit value in use. This value could come from a 0 mA to 20
mA, 0 VDC to 10 VDC, PWM signal, or SC-EQ communication interface, or a locally
programmed value.
Pulldown Demand Time Left
Displays the time remaining in the programmed pulldown period if the value is not
zero.
Output Voltage
Displays the output voltage to the motor. Value is provided by the MV VSD.
VSD Output Frequency
Displays the present output frequency to the motor. Value is provided by the MV VSD.
Input Power
Displays the total kilowatts measured by the MV VSD. Value is provided by the MV VSD.
KW Hours
Displays the cumulative amount of kilowatts used over time as the VSD motor
operates. Value is calculated by the OptiView Control Center from the Input Power
value provided from the MV VSD.
Pre-rotation Vanes Position
Displays the Pre-rotation Vane position as a value between 0 and 100%.
Input Voltage
Displays the average of the 3-phase input voltage to the MV VSD. Value is provided by
the MV VSD.
VSD Cooling Fans Output (LED)
Illuminates when the VSD cooling fans are being commanded to run.
Precharge Relay Output (LED)
Illuminates when the pre-charge relay is commanded to energize.
Output Current (Phase A, B, C)
Displays the three phases of output current to the motor.
Model YK Style H Centrifugal Liquid Chillers with OptiView Control Center
90
