6. Electrical connection
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. Make
sure that the power supply cannot be
switched on accidentally.
‐ Check that the supply voltage and
frequency correspond to the values
stated on the nameplate.
‐ Connect the pump to an external
power switch close to the pump and to
a motor-protective circuit breaker.
Make sure you can lock the power
switch in OFF position (isolated). Type
and requirements as specified in EN
60204-1, 5.3.2.
CAUTION
Sharp element
Minor or moderate personal injury
‐ When installing the wiring in the
terminal box, wear protective gloves to
avoid cutting your hands on sharp
edges.
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.
Make sure to fill the pump with water
before the power is switched on. Follow
the instructions for the pump.
Related information
1.1 Related instructions
6.1
Connecting an external switch
We recommend that you connect the product to an
external switch.
1. Connect the switch via terminals 2 (DI1) and 6
(GND).
A jumper is added from factory.
2. Enable the External stop function.
Default setting from factory.
6.2 Electrical supply systems
Power supply network and earthing systems
If you want to supply the product through
an IT network, make sure that you have a
suitable product variant. If you are in
doubt, contact Grundfos.
The internal EMC filter remains connected,
and subsequently no reduced leakage
current variant is available.
Supply line types
For applications in accordance with IEC 61800-5-1,
the maximum voltage to ground must not exceed 277
V.
The product is not suitable for use for corner earthed
grids.
Maximum installation altitude: 3500 m.
• TN-S earthing system
• TN-C earthing system
• TN-C-S earthing system
• TT earthing system
6.3 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.
6.4
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).
15
English (GB)
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