Electrical Connection; Electrical Protection - Grundfos CUE 150 Instrucciones De Instalación Y Funcionamiento

5.4.3 Mounting on the floor
Warning
The CUE is top-heavy and may fall over if the
pedestal is not anchored to the floor.
The user is responsible for mounting the CUE
Caution
securely on a firm surface.
See the pedestal kit instructions for further
Note
information.
By means of a pedestal (option), the CUE can also be mounted
on the floor.
1. Mark the mounting holes on the floor. See fig. 8.
2. Drill the holes.
3. Mount the pedestal on the floor.
4. Mount the CUE on the pedestal using the enclosed screws.
See fig. 9.
Back
Front
Fig. 8 Drilling template for pedestal [mm]
Fig. 9 CUE on a pedestal

6. Electrical connection

Warning
The owner or installer is responsible for ensuring
correct grounding ing and protection according
to national and local standards.
Warning
Before making any work on the CUE, the mains
supply and other voltage inputs must be
switched off for at least as long as stated in
section 3. Safety and warnings.
ELCB
Fig. 10 Example of three-phase mains connection of the CUE
with mains switch, back-up fuses and additional
protection

6.1 Electrical protection

6.1.1 Protection against electric shock, indirect contact
Warning
The CUE must be grounded correctly and
protected against indirect contact according to
national regulations.
The leakage current to ground exceeds 3.5 mA,
Caution
and a reinforced ground connection is required.
Protective conductors must always have a yellow/green (PE) or
yellow/green/blue (PEN) color marking.
Instructions according to EN IEC 61800-5-1:
• The CUE must be stationary, installed permanently and
connected permanently to the mains supply.
• The ground connection must be carried out with duplicate
protective conductors.
6.1.2 Protection against short-circuit, fuses
The CUE and the supply system must be protected against short-
circuit.
Grundfos demands that the back-up fuses mentioned in section
16.6 are used for protection against short-circuit.
The CUE offers complete short-circuit protection in case of
a short-circuit on the motor output.
6.1.3 Additional protection
The leakage current to ground exceeds 3.5 mA.
Caution
If the CUE is connected to an electrical installation where an
earth leakage circuit breaker (ELCB) is used as additional
protection, the circuit breaker must be of a type marked with the
following symbols:
The circuit breaker is type B.
The total leakage current of all the electrical equipment in the
installation must be taken into account.
ELCB
9