PS200 Configuration & Operation Guide
SINGLE PUMP PROCESS
Page 13
DRIVE OPERATION LIMITS
Drive operation limits safe-guard the pump and drive system
from operating in unstable over-speed and/or low-speed
conditions.
Maximum Speed
- The PumpSmart System will adjust the
speed of the motor to achieve the desired operating setpoint.
Although the PumpSmart system can drive the motor to 2-3
times its nameplate speed, this is generally impractical for
several reasons. First, unless the pump and motor are
designed for overspeed operation, they could prematurely
wear or even catastrophically fail. Second, centrifugal pumps
generate pressure by the square of the speed and overspeed
operation may overpressure the pump or surrounding piping
system.
The maximum speed setting should never be set over the
full load RPM of the motor or the pump manufacturers
stated maximum speed of the pump.
14.01 MAXIMUM SPEED
KEY SEQUENCE
[From parameter group: 11 START UP
DATA]
OR
Scroll to parameter
group14, SPD LIM/STRT
LVL. Parameter 14.01 will
be the first selection.
ENTER
Press to enter the
parameter setting mode
OR
OR
Use a combination of the
arrow keys to scroll to the
maximum speed.
Enter the maximum
speed that the pump,
motor, and system can
operate at. In most
cases, the maximum
speed will be the same
as the previously entered
full load RPM.
MAX SPEED
d
Full Load
Motor RPM
and
d
Pump
maximum
speed
The default value is the
speed set in parameter
11.07 MOTOR FL RPM
ENTER
Press to complete the
entry
Minimum Speed - As the demand on the pump decreases,
PumpSmart will decrease the pump speed to match the new
demand. This Minimum Speed parameter sets the minimum
speed that the pump can operate at. It is also used to define
the safe speed to run the pump during a pump protection
fault. The default value for minimum speed is 25% of 11.07
MOTOR FL RPM.
When determining a minimum speed, consider the
following:
x
Motor Minimum Speed [Turndown ratio] - Due to
motor loading and thermal effects, the motor
minimum speed on centrifugal pumps should not be
less than 1/10
th
its full-load speed.
ACT
PAR
FUNC
DRIVE
ENTER
1 L
Æ
0 P S I G 0
1 4 S P D L I M / S T R T L V L
1 M A X I M U M S P E E D
1770
Summary of Contents for PumpSmart PS200
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