Grundfos LFE Instrucciones De Instalación Y Funcionamiento página 22

13.1.7 Supply voltage and power supply
3 x 440-480 V - 10 %/+ 10 %, 60 Hz, PE.
3 x 208-230 V - 10 %/+ 10 %, 60 Hz, PE.
The supply voltage and frequency are marked on the pump
nameplate. Make sure that the pump is suitable for the power
supply of the installation site.
The wires in the terminal box must be as short as possible.
Excepted from this is the protective ground lead which must be
long enough that it is the last one to be disconnected in case the
cable is inadvertently pulled out of the cable entry.
Fig. 10 Power connection
Cable glands
Cable glands comply with EN 50626.
• 2 x M16 cable gland
• 1 x M20 cable gland
• 2 x M16 knock-out cable entries.
DANGER
Electric shock, malfunction or damage
Death or serious personal injury; product damage or
failure
- Replace power supply cable immediately if
damaged. Only qualified personnel must replace
it.
Grid types
Three-phase E-pumps can be connected to all grid types.
DANGER
Electric shock
Death or serious personal injury; product damage or
failure
- Do not connect three-phase E-pumps to a power
supply with a voltage between phase and ground
of more than 440 V.
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13.1.8 Start/stop of pump
When the pump is switched on via the power supply, it will start
after approximately 5 seconds.
If a higher number of starts and stops is desired, use the input for
external start/stop when starting/stopping the pump.
When the pump is switched on via an external On/Off switch, it
L1
L1
will start immediately.
L2
L2
L3 Automatic restart
L3
However, automatic restart only applies to fault types set up to
automatic restart. These faults could typically be one of these
faults:
•
•
13.1.9 Connections
As a precaution, the wires to be connected to the following
connection groups must be separated from each other by
reinforced insulation in their entire lengths:
Group 1: Inputs
•
•
•
•
•
All inputs (group 1) are internally separated from the power-
conducting parts by reinforced insulation and galvanically
separated from other circuits.
All control terminals are supplied with protective extra-low voltage
(PELV), thus ensuring protection against electric shock.
Group 2: Output (relay signal, terminals NC, C, NO)
The output (group 2) is galvanically separated from other circuits.
Therefore, the supply voltage or protective extra-low voltage can
be connected to the output as desired.
The number of starts and stops via the power supply
must not exceed 4 times per hour.
If a pump set up for automatic restart is stopped due
to a fault, it will restart automatically when the fault
has disappeared.
temporary overload
fault in the power supply.
If no external On/Off switch is connected, connect
terminals 2 and 3 using a short wire.
start/stop terminals 2 and 3
digital input terminals 1 and 9
setpoint input terminals 4, 5 and 6
sensor input terminals 7 and 8
GENIbus terminals B, Y and A