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8 Product Description
8 1 General
LORENTZ PSk2 solar surface pump systems are vertical
multi stage pumps designed to efficiently deliver the high-
est volumes of water from a solar power source. PSk2-CS
surface pumps are typically used in irrigation projects and
for wide area drinking water applications where they relia-
bly meet the most demanding requirements, economically,
without pollution and without a grid connection or diesel
generator.
The system is composed of a PV generator array, a pump
and a solar pump controller. Based on the design philos-
ophy that it is more efficient to store water rather than
electricity, there is no energy storing device such as storage
battery in the system.
The PV generator, an aggregation of PV modules connected
in series and in parallel, absorbs solar irradiation and
converts it into electrical energy, providing power for the
whole system. The pump controller controls and adjusts
the system operation and converts the DC produced by the
PV generator into AC to drive the pump, and adjusts the
output frequency in real-time according to the variation
of sunlight intensity to realize the maximum power point
tracking (MPPT).
The PSk2 controller converts the DC power from the solar
array to digitally created AC signal to run the motor. Due to
the special nature of this PWM signal it cannot be meas-
ured with a multimeter. Motor speed (RPM) is proportional
to the signal frequency.
The PSk2 CS-F and CS-G pumps are centrifugal pumps,
driven by a 3-phase air cooled AC motor.
The main difference between the CS-F and CS-G series is
the structural design. CS-F are vertical multi-stage, CS-G
are single stage pumps.
BERNT LORENTZ GmbH & Co. KG Kroegerskoppel 7, 24558 Henstedt-Ulzburg, Germany, Tel. +49 (0) 4193 7548 - 0, Fax - 29, www.lorentz.de
All specifi cations and information are given with good intent, errors are possible and products may be subject to change without notice. Pictures may
differ from actual products depending on local market requirements and regulations.
8 2 Features
The LORENTZ PSk2 CS-F/CS-G Series has the following
features:
ƒ Engineered in Germany using high quality non
corrodible materials
ƒ IP54 / NEMA 3A corrosion resistant controller housing
ƒ 0 – 60Hz motor speed control
ƒ Wide range of inputs to influence pump behaviour
ƒ Integrated monitoring and management including
onboard recording of 5 years performance data, smart
device access via PumpScanner Android™ App and
integration to LORENTZ pumpMANAGER remote
management service
ƒ Inbuilt irradiation measurement and pump control based
on power available
ƒ Integration with the LORENTZ SmartPSU for grid / gener-
ator connection and power blending
7
8 3 Naming
Pump model definition
for CS-F12 to CS-F20 pumps
CS - F
12 - 9
stages
rated flow (m³/h)
vertical multistage pump
centrifugal surface
for CS-F32 to CS-F85 pumps
CS - F
32 - 60 - 2
number of small impellers
stages ×10
rated flow (m³/h)
vertical multistage pump
centrifugal surface
for CS-G pumps
CS - G
100 - 22 / 2
motor poles
rated flow (m³/h)
DN of inlet and outlet
single stage pump
with cast housing
centrifugal surface
Sun. Water.
Life.
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