Path:
Settings > Advanced functions > Variable-frequency drives >
VFD settings, pump 1 > Specific-energy test >
4-2-10-1-3_VFD_ENERGY_TEST_154
Specific-energy test
Specific-energy diagram
This function can only be used if a power meter (MP 204
or CUE/VFD) and flowmeter are installed in the system.
Flow calculation can be used instead of a flowmeter.
Specific energy is a measure of the pump efficiency measured as
used energy [kWh] per pumped volume [m
3
].
This display is used to show the "Specific-energy test".
The frequency representing the lowest specific-energy consumption
is displayed when the test is done. This frequency can be used as
reference in the "Automatic energy optimisation" function or set as
fixed frequency.
Path:
Settings > Advanced functions > Variable-frequency drives >
VFD settings, pump 1 > Specific-energy test > Specific-energy
diagram
4-2-10-1-3-1_VFD_ENERGY_GRAPH_155
Specific-energy diagram
Related information
8.2.11.1 Specific-energy diagram
8.2.11.1 Specific-energy diagram
This function can only be used if a power meter (MP 204
or CUE/VFD) and flowmeter are installed in the system.
Flow calculation can be used instead of a flowmeter.
Specific energy is a measure of the pump efficiency measured as
used energy [kWh] per pumped volume [m
3
].
This display is used to show the "Specific-energy test".
The frequency representing the lowest specific-energy consumption
is displayed when the test is done. This frequency can be used as
reference in the "Automatic energy optimisation" function or set as
fixed frequency.
Path:
Settings > Advanced functions > Variable-frequency drives >
VFD settings, pump 1 > Specific-energy test > Specific-energy
diagram
4-2-10-1-3-1_VFD_ENERGY_GRAPH_155
Specific-energy diagram
Related information
8.2.11 Specific-energy test (installation)
8.2.12 PID control
The parameters can be changed via the following:
•
PC Tool WW Controls
•
SCADA system
•
CU 362 operating panel.
If flush settings have to be made, see section about flush settings.
VFD interface:
Select how the VFD is to be controlled:
•
CUE (GENIbus). See the installation and operating instructions
for Dedicated Controls.
•
Analog output (0-10 V). See section about analog outputs.
"Min. frequency" is set to 30 Hz as default.
"Max. frequency" is set to 50 hz as default.
These parameters are the limits for the fixed frequency. This means
that the frequency cannot be set higher than 50 Hz or lower than 30
Hz.
Path:
Settings > Advanced functions > Variable-frequency drives >
VFD settings, pump 1
4-2-10-1_VFD_PID_REGULA
TION_138
PID control
Related information
8.2.9 Variable-frequency drives (VFD)
43
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