Grundfos CRE Manual De Instrucciones página 10

If the power cable is damaged, it must be
replaced by the manufacturer, the
manufacturer's service partner or a
similarly qualified person.
The user or the installer is responsible for
correct earthing and protection according
to local regulations.
All electrical connections must be carried
out by qualified persons.
7.3 Protection against electric shock, indirect
contact
WARNING
Electric shock
Death or serious personal injury
‐
Connect the product to protective earth
and provide protection against indirect
contact in accordance with local
regulations.
Protective-earth conductors must have a yellow and
green (PE) or yellow, green and blue (PEN) colour
marking.
7.4 Cover for the power cables
Model K is equipped with a cover for the power
cables.
The cover is attached to the insulation cover with 2
screws (2) and is equipped with 3 voltage measuring
holes (1) for the respective phases (L1, L2, L3).
2
1
L1
L2
L3
PE
The cover for the power cables must be
installed before switching on the product.
7.5 Protection against power supply voltage
transients
The product is protected against power supply
voltage transients in accordance with EN 61800-3.
10
7.6 Motor protection
The product incorporates thermal protection against
slow overloading and blocking. No external motor
protection is required.
The product includes load and speed sensitive motor
overload protection with thermal memory retention.
7.7.2 Cable glands
See the list of cable gland sizes in relation to motor
sizes in the section on other technical data.
It is recommended to use a cable gland M20 or M40
as applicable with IP 66 rating and suitable for cable
strain relief.
After installation, all M20 openings must
be closed by means of the delivered blind
plugs to maintain the IP 55/66 rating.
7.7.3 Cable cross-section
WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply to the
product including the power supply for
the signal relays. Wait at least 5
minutes before you make any
connections in the terminal box.
‐
Follow the wiring diagrams and local
regulations.
‐
Use branch-circuit protection fuses.
‐
Comply with local regulations as to
cable cross-sections.
‐
Use the recommended fuse size.
‐
Connect the cables to terminals by
applying the recommended tightening
torque.
WARNING
Fire hazard
Death or serious personal injury
‐
Comply with local regulations as to
cable cross-sections.
‐
Use the recommended fuse size.
‐
Connect the cables to terminals by
applying the recommended tightening
torque.
Make sure that the cables are secured
with cable glands providing strain relief.
Recommended cable type: H07RN-F.