CONTENTS
1.
2.
2.1
2.2
2.3
3.
3.1
3.2
3.3
3.4
4.
4.1
4.2
5.
5.1
5.2
5.3
5.4
6.
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
7.
8.
8.1
8.2
9.
10.
10.1
10.2
10.3
10.4
10.5
10.6
10.7
11.
12.
12.1
12.2
13.
13.1
13.2
13.3
13.4
14.
14.1
14.2
15.
15.1
15.2
15.3
15.4
16.
16.1
Page
16.2
5
16.3
5
16.4
5
16.5
5
16.6
6
16.7
16.8
6
6
17.
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6
Warning
6
Prior to installation, read these installation and
7
operating instructions. Installation and operation
7
must comply with local regulations and accepted
7
codes of good practice.
7
7
1. Symbols used in this document
7
8
Warning
8
If these safety instructions are not observed,
9
it may result in personal injury!
9
10
If these safety instructions are not observed,
11
Caution
it may result in malfunction or damage to the
13
equipment!
13
14
Notes or instructions that make the job easier
Note
14
and ensure safe operation.
15
15
2. Introduction
15
This manual introduces all aspects of your Grundfos CUE
15
variable frequency drive in the output current range of 212-480 A.
16
in the power range of 150 to 350 hp.
17
Always keep this manual close to the CUE.
20
20
2.1 General description
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The CUE is a series of external variable frequency drives
21
especially designed for pumps.
25
Thanks to the start-up guide in the CUE, the installer can quickly
26
set central parameters and put the CUE into operation.
27
29
Connected to a sensor or an external control signal, the CUE will
quickly adapt the pump speed to the actual demand.
35
36
2.2 Applications
36
The CUE series and Grundfos standard pumps are a supplement
to the Grundfos E-pumps range with integrated variable
36
frequency drive.
36
A CUE solution offers the same E-pump functionality
36
36
•
in the supply voltage or power ranges not covered by the
37
E-pump range.
37
•
in applications where an integrated variable frequency drive is
37
not desirable or permissible.
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37
38
38
38
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39
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40
40
40
40
41
41
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5