6
5. Electrical connection
The electrical connection and protection should be
carried out in accordance with local regulations.
• The pump requires no external motor protection.
• The operating voltage and frequency are marked
on the pump nameplate. Please make sure that
the motor is suitable for the electricity supply on
which it will be used.
Open the control box cover as shown in fig. 4.
Fig. 4 Opening the control box
If the control box cover cannot be lifted sufficiently, it
can be removed as shown in fig. 5.
Fig. 5 Removing the control box cover
5.1 Supply voltage
1 x 230 V ± 10 %, 50/60 Hz.
WARNING!
Never make any connections in the
pump control box unless the electricity
supply has been switched off for at
least 5 minutes.
The ground terminal of the pump must
be earthed.
The pump must be connected to an
external mains switch with a contact
separation of at least 1/8 inch (3 mm) in
each pole.
Grounding or neutralization can be
used for protection against indirect
contact.
Megging must be carried out as
described in section 10. Megging.
If the pump is connected to an electric
installation where an earth leakage
circuit breaker (ELCB) is used as
additional protection, this circuit
breaker must trip out when earth fault
currents with DC content (pulsating
DC) occur.
The earth leakage circuit breaker must
be marked with the symbol shown:
Step Action
1
TM02 0456 3503
2
TM02 0457 3503
Step Action
1
TM02 7441 3503
2
TM02 7442 3503
Grundfos.bk Page 6 Friday, January 15, 2010 3:23 PM
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