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8.1.6 Pump vibration sensor (PVS 3) (only KPL
and KWM)
The PVS 3 sensor is a three plane vibration sensor
that monitors the vibration level of the pump in order
to protect the pump and the pipe system against
damage. A change in the vibration level is an
indication of an abnormal situation. The reason for
this can be a clogged impeller, worn bearings, a
closed outlet valve etc., indicating that a service
inspection must be carried out before the pump or
the pipe system is damaged.
8.2 Pump control
KPL, KPG and KWM pumps can be controlled by the
following devices, which are available as
accessories:
•
Grundfos Dedicated Controls for one to six
pumps
•
IO 113
•
SM 113
•
MP 204.
8.2.1 Dedicated Controls
Grundfos Dedicated Controls is a control system
designed for installation in either commercial
buildings or network pumping stations with up to six
pumps. Advanced control and data communication is
also possible with the Grundfos Dedicated Controls
system.
The Dedicated Controls system consists of the
following components:
•
CU 361 control unit
•
IO 351B module (general I/O module)
•
IO 113 protection module (optional).
The Dedicated Controls system starts and stops
pumps by means of the following devices:
•
float switches
•
analog pressure sensors
•
ultrasonic sensors.
Furthermore, it is possible to control the water level
by combining float switches with an analog pressure
sensor. Two additional safety float switches can be
installed in the Dedicated Controls system for high-
level and dry-running alarm.
8.2.2 IO 113
IO 113 forms the interface between a Grundfos
stormwater or wastewater pump with analog and
digital sensors and the pump controller. The most
important sensor data are indicated on the front
panel. See also the installation and operating
instructions for IO 113 on www.grundfos.com.
One pump can be connected to an IO 113.
Together with the sensors, IO 113 forms a galvanic
separation between the motor voltage in the pump
and the controller connected.
IO 113 with SM 113 enables the following functions:
•
protecting the pump against overtemperature
•
monitoring the sensors for analog measurement
of the following parameters:
– motor temperature
– pump vibrations
– leakages (WIO)
– stator insulation resistance
– bearing temperature
– digital measurement of moisture in motor
•
stopping the pump in case of alarm
•
remotely monitoring the pump via RS485
communication (Modbus or GENIbus).
Measurement of insulation resistance
IO 113 measures the insulation resistance between a
stator winding and earth:
•
Resistance above 10 M
Ω
= ok
•
Resistance between 10 M
Ω
and 1 M
Ω
= warning
•
Resistance below 1 M
Ω
= alarm.
8.2.3 SM 113
SM 113 is used for collecting and transferring sensor
data. SM 113 works together with IO 113 through
power line communication using the Grundfos
GENIbus protocol.
SM 113 can be placed either inside the pump
terminal box (allowing fewer sensor wires out of the
pump) or in the control cabinet next to the pump
installation. For electrical connection, see figures
-
. SM 113 collects data from the following devices:
•
3 current sensors, 4-20 mA
•
3 Pt100 thermal sensors
•
1 PTC thermal sensor
•
1 digital input.
