Lowara e-SV 15SV17FL150T [125/264] Opera opera opera opera operating principle ting principle ting principle ting principle ting principle

Lowara e-SV 33SV4/2AGH075T [125/264] Opera opera opera opera operating principle ting principle ting principle ting principle ting principle
125
e-SVHe-SVH
e-SVHe-SVH
e-SVH
HYDROHYDRO
HYDROHYDRO
HYDRO
VV
VV
V
ARAR
ARAR
AR
®®
®®
®
OPERAOPERA
OPERAOPERA
OPERA
TING PRINCIPLETING PRINCIPLE
TING PRINCIPLETING PRINCIPLE
TING PRINCIPLE
The basic function of the Hydrovar®
device is to
control the pump to meet the system demands.
HYDROHYDRO
HYDROHYDRO
HYDRO
VV
VV
V
ARAR
ARAR
AR
®®
®®
®
performs these functions by performs these functions by
performs these functions by performs these functions by
performs these functions by:
1) Measuring the system pressure or flow via a
transmitter mounted on the pump’s delivery side.
2) Calculating the motor speed to maintain the correct
flow or pressure.
3) Sending out a signal to the pump to start the motor,
increase speed, decrease speed or stop.
4) In the case of multiple pump installations, Hydrovar®
will automatically provide for the cyclic changeover of the
pump’s starting sequence.
In addition to these basic functions, Hydrovar® can do
things only by the most advanced computerised control
systems, such as:
• Stop the pump(s) at zero demand.
• Stop the pump(s) in case of water failure on the
suction side (protection against dry running).
• Stop the pump if the required delivery exceeds the
pump’s capacity (protection against cavitation caused
by excessive demand), or automatically switch on the
next pump in a multiple series.
• Protect the pump and motor from overvoltage,
undervoltage, overload and earth fault.
• Vary the pump speed acceleration and deceleration time.
• Compensate for increased flow resistance at high flow
rates.
• Conduct automatic test starts at set intervals.
• Monitor the converter and motor operating hours.
• Display all functions on an LCD in different languages
(Italian, English, French, German, Spanish, Portuguese,
Dutch).
• Send a signal to a remote control system which is
proportional to the pressure and frequency.
• Communicate with another Hydrovar® or control
system via an RS 485 interface.
TYPICAL EXAMPLE OF ENERGTYPICAL EXAMPLE OF ENERG
TYPICAL EXAMPLE OF ENERGTYPICAL EXAMPLE OF ENERG
TYPICAL EXAMPLE OF ENERG
Y SAY SA
Y SAY SA
Y SA
VINGSVINGS
VINGSVINGS
VINGS
System: 22SV07F75T vertical multistage electric pump with 7,5 kW motor equipped with Hydrovar®, 70 m head.
19 hour/day operation.
Application: maintaining a constant pressure as the flow rate varies.
Control for constant pressure
Control to match a system curve
Control for constant flow
Control according to an external signal
TABELLA RISPARMIO ENERGETICO
FLOW POWER OPERATING TOTAL
CONSTANT SPEED VARIABLE SPEED SAVED TIME ENERGY
PUMP PUMP SAVINGS
m
3
/h
kW kW kW (hours) kWh
24 7,4 7,4 0,0 876 -
21 6,9 6,1 0,8 876 701
18 6,5 5,0 1,5 1752 2.628
14 5,6 3,8 1,8 1752 3.154
10 5,1 2,8 2,3 1752 4.030
10.512
sv-hydr-en_a_te
YEARLY ENERGY SAVINGS (kWh)
ABSORBED POWER

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