Pump Sizing – SubDrive75
The SubDrive75 is configured at the factory for use with 0.55 kW pumps that are mounted to 1.1 kW
Franklin Electric three-phase motors.
In general, the SubDrive75 will enhance the performance of a
0.55 kw pump to a similar or better performance than a conventional 1.1 kW pump of the same flow
rating (pump series).
Drive Configuration
The SubDrive75 can also be set up to run a 0.75 kW or 1.1 kW
pump if desired, but larger pumps will still produce to the 1.1
kW curve and may only be operated with a 1.1 kW motor. To
operate a different pump size, a DIP switch must be positioned
to select the correct pump rating. Otherwise, the SubDrive75
may trigger erroneous faults.
To configure the SubDrive75 for a 0.75 kW or 1.1 kW pump,
locate the DIP switch marked “SW1”. Use a small screwdriver
(provided) to change the DIP switch setting according to the
chart as shown.
1
2
3
SubDrive
ON
1
2
3
4
SW1
Configuration Switch SW1
1
2
3
4
1
2
3
4
1
2
3
4
O N
O N
O N
0,55 kW
(default)
0,75 kW
1,1 kW
Serious or fatal electrical shock may result from contact with internal electrical components. DO NOT, under any
circumstances, attempt to modify DIP switch settings until power has been removed and 5 minutes have passed
for internal voltages to discharge! Power must be removed for DIP switch setting to take effect.
DANGER
To select the proper 0.55 kW pump, first choose
a 1.1 kW curve that meets the application’s
head and flow requirements. Use the 0.55 kW
pump in the same pump series (flow rating). The
SubDrive75 will adjust the speed of this pump to
produce the performance of the 1.1 kW curve.
An
EXAMPLE
of this is illustrated in the graph
at right. Please consult the pump manufacturer’s
pump curve for your specific application.
EXAMPLE 1
Typical CP Water SubDrive 75 Performance
700
600
500
400
300
200
100
0
5
10
15
20
25
0.55 kW, 2,5m³ with SubDrive75
Conventional 1.1 kW, 2,5m³ Pump
Conventional 0.55 kW, 2,5m³ Pump
Total Head (m)
210
180
150
120
90
60
30
0
1,2
2,3
3,4
4,5
5,6
Flow (m³/h)
6
Technical changes without notice / Techn. Änderungen vorbehalten / Modifications techniques réservées sans préavis / 5930
