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MAIN CHARACTERISTICS OF FREQUENCY CONVERTERS USED IN THE
PHV BOOSTER SETS
The PHV series booster sets use a Hydrovar
®
variable frequency drive, an automatic device that adjusts the speed of the
electric pump in order to maintain constant pressure in the system.
Converters with power up to 30 HP can be mounted directly on
to the motor. Models with over 30 HP power, are designed for wall
mounting only. The pressure is measured by a pressure transmitter
which uses a standard 4..20 mA current signal. The system pressure
value can be read on the converter’s display. A simple user interface
allows you to set the desired pressure value for optimal adjustment,
as well as to view the operating data, such as the hours of
operation and any alarms triggered. Included diagnostic menu to view
temperature, current and voltage values facilitates diagnostics and
failure analisys. Indicator lights signal power status, pump running and
malfunctions.
A password is required to access sensitive settings that allow you
to program the Hydrovar in order to adapt it to any control
requirements, such as flow resistance compensation, external
control, periodic testing and so on. When more than one pump is
used, the converters exchange information with each other through an
RS485 serial line which can connect up to 8 Hydrovar devices plus
one external unit for remote control. The Pump-link and Pump-watcher
dedicated systems, connected to the Hydrovar®, enable remote
control through a traditional telephone line or mobile telephony. A
serial port available as standard up to 15 HP allows you to control the
Hydrovar® converters from a Modbus
®
field serial bus line.
The converter is equipped with two potential-free relays which can
be used for remote signalling of pump running and malfunction
status, plus a programmable voltage analogue output for signalling
the frequency or pressure. Standard version with two sensor inputs
for implementing of two actual values signals within one system (min/
max, difference) or for a second sensor for safety reasons. Specific
digital inputs are used for protection against water failure, motor
overtemperature, as well as for external enable signal and remote
control. The converter also incorporates a dry running protection
function via an adjustable minimum pressure threshold.
FCC Class A filter standard for Hydrovar three-phase power supply.
E.g. Industrial areas, technical areas of any building fed from a
dedicated transformer are examples of environment locations.
FCC Class B filter standard for Hydrovar single-phase power supply.
E.g. Houses, apartments, commercial premises or offices in a residential building are examples of environment locations.
Further information is available in the Hydrovar manual.
PHV Series Hydrovar with SSV Pump
Modular Hydrovar, Bare Unit