Electrical Connection; Supply Voltage - Grundfos MAGNA 40-120 Montage- Und Betriebsanleitung

5. Electrical connection

The electrical connection and protection should be
carried out in accordance with local regulations.
Warning
Never make any connections in the
pump control box unless the electricity
supply has been switched off for at
least 5 minutes.
The earth terminal of the pump must be
earthed.
The pump must be connected to an
external mains switch with a contact
separation of at least 3 mm in each
pole.
Earthing or neutralisation 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:
• 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. 5.
Step
1
2
Fig. 5 Opening the control box
Action
If the control box cover cannot be lifted sufficiently,
it can be removed as shown in fig. 6.
Step
1
2
Fig. 6 Removing the control box cover

5.1 Supply voltage

1 x 230-240 V – 10 %/+ 6 %, 50/60 Hz.
Action
9