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grundfos CUE
Frequency Converter
grundfos cue
easy installation, operation and
control of pump speed
maximum convenience and
enhanced User interface
Complete feature set opens up
for many APPLICATION RELATED
FUNCTIONS:
Grundfos CUE offers speed control of virtually any Grundfos pump irrespective of size or area of
application and is an integral part of Grundfos iSOLUTIONS.
Stop function
Available for constant pressure or
constant level applications, the stop
function stops the pump at low flow
and prevents the pump from running at
low flow with reduced efficiency and
against closed valve with the risk of
heating up the water in the pump or
damaging the shaft seal.
Grundfos CUE offers plug-and-pump installation and operation coupled with extensive control and
monitoring possibilities. Installing and commissioning Grundfos CUE is completed in a few simple
steps, where only a few application-specific settings and variables are needed to get the system
running.
Pump family settings
Grundfos CUE offers a unique feature using pre-programmed
data for different Grundfos pump families. During installation,
the correct values are set for minimum speed, maximum speed,
ramp times, and other pump specific settings. More than 15
parameters are set to suggested default values when the correct
Grundfos pump family is selected during setup.
Control mode
Grundfos CUE provides a series of pre-defined application control
modes:
•
•
•
•
•
Intuitive start up guide
Grundfos CUE offers quick and easy set-up and commissioning.
Simply key in application-specific variables such as motor data,
pump family, control mode (e.g. constant pressure), sensor type,
and setpoint, and Grundfos CUE will automatically set all
necessary parameters.
Constant pressure with or without stop function
Proportional Differential pressure
Constant level with or without stop function
Constant temperature
Proportional pressure
These predefined control modes make it simple to program the
drive for the application. When controlled from an external source,
the open loop control mode is used, supplying Grundfos CUE
with information about the required speed.
Duty/standby
Connect two Grundfos CUEs using the
standard built-in GENibus interface for
a duty/standby function of two pumps,
with one pump as the backup for the
other.
extend operating range or reduce physical size of the required pump. Motors
and Drive should be selected carefully
to the actual load in the application.
Dry-running protection
Grundfos CUE offers protection against
dry running, as one of the inputs can be
dedicated to a variety of dry-running
sensors and detectors.
Advanced functions
Grundfos CUE offers a series of
advanced functions which can be setup
by Grundfos. Contact Grundfos for
more information.
Over synchronous speed
Over synchronous speed is an option for
a series of Grundfos pumps in order to
Technical specifications
Control input/output connections:
Four digital inputs • One dedicated input for external start/stop
Remaining inputs can be set to:
• Min. (min. curve)
• Max. (max. curve)
• Ext. fault (external fault)
• Flow switch
• Alarm reset
• Dry running (from external sensor)
• Not active
Two dedicated analogue inputs One 0-10V/ - 0/4-20mA input for external setpoint.
One 0/4-20 mA input for sensor feedback
One analogue output Use to indicate different parameters such as
speed, actual value, etc.
Grundfos iSOLUTIONS is our approach to deliver the optimal combination of pumps,
drives and auxiliary components for the specific application, incorporating special
features and functions and building on application knowledge and experience.
Easy integration of pumps, drives, measurement, controls, protection and communication into the solution combined with a high level of customisation, compactness
and preset units saves engineering, installation and commissioning time.
Learn more on grundfos.com/isolutions
Two digital relay outputs
Can be set up to report information such as
operation, warnings and alarms.
RS485 Genibus interface
Grundfos CUE is equipped with a standard RS485
interface that can communicate with Grundfos
control systems, and via a Grundfos gateway be
connected to other bus systems for example LONworks, Profibus, Modbus by using Grundfos CIU.
Accessories
Control mode
Proportional pressure
H
duty/standby
Constant level
L
CUE
CUE
CUE 1
GENIbus
CUE 2
L
Q
Q
temperature control
H
CUE
constant pressure
H
Duty
CUE
p
Q
Q
Standby
MCB 114 sensor input module
• One additional 0/4-20 mA input for sensor
• Two Pt100/1000 inputs to be used in
connection with motor
bearings temperature
measurement, or
alternative temperature measurement
such as the media
temperature
Motor filters
Two different types of motor filters are available:
• dU/dt filters for limiting the rise time of the
output of the drive to approximately 500V/us
• Sine wave filters, to create a sine wave of the
output voltage, limiting both Upaek and dU/dt
to values comparable to mains supply
98848178 0215/PRODUCT LINE MANAGEMENT/11735-D&I
Power supply
7.5-250 kW
3 x 525-690 V
0.75-7.5 kW
3 x 525-600 V
0.55-250 kW
3 x 380-500 V
0.75-45 kW
3 x 200-240 V
1.1-7.5 kW
1 x 200-240 V
0.3
1
3
10
30
100
250
EMC filter for conducted emission according to IEC61800-3 Ed. 2.
• CUE rated 500V or lower up to 90kW: Build-in filter for household application (class C1)
• CUE rated 500V or lower above 110kW: Build-in filter for industrial application (class C2)
• CUE rated 525V or more independent of power size: Build-in filter for industrial
application (class C3)
Grundfos Holding A/S
Poul Due Jensens Vej 7
DK-8850 Bjerringbro
Tel: +45 87 50 14 00
www.grundfos.com
kW
The name Grundfos, the Grundfos logo, and be think innovate are registered trademarks owned by Grundfos Holding A/S or Grundfos A/S, Denmark. All rights reserved worldwide.
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