Safety And Warnings; Warning; Safety Regulations; Installation Requirements - Grundfos CUE Series Installation And Operating Instructions Manual

3. Safety and warnings

3.1 Warning

Warning
Any installation, maintenance and inspection
must be carried out by trained personnel.
Warning
Touching the electrical parts may be fatal, even
after the CUE has been switched off.
Before making any work on the CUE, the mains
supply and other input voltages must be
switched off at least for as long as stated below.
Voltage
15 minutes
380-500 V 110-250 kW
525-690 V
Wait only for shorter time if stated so on the nameplate of the
CUE in question.

3.2 Safety regulations

• The on/off button of the control panel does not disconnect the
CUE from the mains voltage and must therefore not be used
as a safety switch.
• The CUE must be earthed correctly and protected against
indirect contact according to national regulations.
• The leakage current to earth exceeds 3.5 mA.
• Enclosure class IP20/21 must not be installed freely
accessible, but only in a panel.
• Enclosure class IP54/55 must not be installed outdoors
without additional protection against water and the sun.
• Always observe national and local regulations as to cable
cross-section, short-circuit protection and overcurrent
protection.

3.3 Installation requirements

The general safety necessitates special considerations as to
these aspects:
• fuses and switches for overcurrent and short-circuit protection
• selection of cables (mains current, motor, load distribution and
relay)
• net configuration (IT, TN, earthing)
• safety on connecting inputs and outputs (PELV).
3.3.1 IT mains
Warning
Do not connect 380-500 V CUE frequency
converters to mains supplies with a voltage
between phase and earth of more than 440 V.
In connection with IT mains and earthed delta mains, the mains
voltage may exceed 440 V between phase and earth.
3.3.2 Aggressive environment
The CUE should not be installed in an
environment where the air contains liquids,
Caution
particles or gases which may affect and damage
the electronic components.
The CUE contains a large number of mechanical and electronic
components. They are all vulnerable to environmental effects.

3.4 Reduced performance under certain conditions

The CUE will reduce its performance under these conditions:
• low air pressure (at high altitude)
• long motor cables.
The required measures are described in the next two sections.
4
Min. waiting time
20 minutes
110-250 kW
3.4.1 Reduction at low air pressure
Warning
At altitudes above 2000 m, PELV cannot be met.
PELV = Protective Extra Low Voltage.
At low air pressure, the cooling capacity of air is reduced, and the
CUE automatically reduces the performance to prevent overload.
It may be necessary to select a CUE with a higher performance.
3.4.2 Reduction in connection with long motor cables
The maximum cable length for the CUE is 300 m for unscreened
and 150 m for screened cables. In case of longer cables, contact
Grundfos.
The CUE is designed for a motor cable with a maximum cross-
section as stated in section 16.6 Fuses and cable cross-section.

4. Identification

4.1 Nameplate

The CUE can be identified by means of the nameplate. An
example is shown below.
T/C: CUE202P1M2T5E20H1BXCXXXSXXXXAXBXCXXXXDX
T/C: CUE202P1M2T5E20H1BXCXXXSXXXXAXBXCXXXXDX
S/N: 123456G234 S/N: 123456G234
Prod. no: 12345678 Prod. no: 12345678
1.5 kW (400V) / 2 Hp (460V)
1.5 kW (400V)
IN: 3x380-500 V 50/60Hz 3.7A IN: 3x380-500 V 50/60Hz 3.7A
OUT: 3x0-Vin 0-100Hz 4.1 A 2.8 kVA
OUT: 3x0-Vin 0-100Hz 4.1 A 2.8 kVA
CHASSIS/IP20 Tamb. 45C/122F
CHASSIS/IP20 Tamb. 45C/122F
IIIIIIIIIIIBAR CODEIIIIIIIIIII
IIIIIIIIIIIBAR CODEIIIIIIIIIII
Listed 76X1 E134261 Ind. Contr. Eq.
Listed 76X1 E134261 Ind. Contr. Eq.
See manual for prefuse
See manual for prefuse
CAUTION:
CAUTION:
SEE MANUAL / VOIR MANUEL
SEE MANUAL / VOIR MANUEL
WARNING:
WARNING:
STORED CHARGE DO NOT TOUCH UNTIL
STORED CHARGE DO NOT TOUCH UNTIL
4 MIN AFTER DISCONNECTION
4 MIN AFTER DISCONNECTION
CHARGE RESIDUELLE, ATTENDRE
CHARGE RESIDUELLE, ATTENDRE
4 MIN APRES DECONNEXION
4 MIN APRES DECONNEXION
Fig. 1 Example of nameplate
Text Description
CUE (product name)
T/C:
202P1M2... (internal code)
Prod.no: Product number: 12345678
Serial number: 123456G234
S/N: The last three digits indicate the production date:
23 is the week, and 4 is the year 2004
1.5 kW Typical shaft power on the motor
Supply voltage, frequency and maximum input
IN:
current
Motor voltage, frequency and maximum output
OUT: current. The maximum output frequency usually
depends on the pump type.
CHASSIS/
Enclosure class
IP20
Tamb. Maximum ambient temperature

4.2 Packaging label

The CUE can also be identified by means of the label on the
packaging.
MADE IN DENMARK
MADE IN DENMARK