ITT Industries PumpSmart PS200, Configuration & Operation Manual

Page: 37 / 159

PS200 Configuration & Operation Guide
MULTI PUMP-PROCESS CONFIGURATION
Page 35
DRIVE OPERATION LIMITS
Drive operation limits safe-guard the pump and drive
system from operating in unstable over-speed conditions
and 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
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
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