Three-Phase Pumps, 11-22 Kw - Grundfos CRE Montage- Und Betriebsanleitung

5.1.10 Connections basic Pump I/O module
As standard the CME pump types come with the basic Pump I/O
module. Optional the pump types can be acquired with the
Advanced I/O module see 5.1.9 Connections Advanced I/O
module.
If no external on/off switch is connected, connect
Note
terminals 2 and 3 using a short wire.
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
• 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
All inputs (group 1) are internally separated from the mains-
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.
Group 3: Mains supply (terminals N, PE, L)
A galvanic separation must fulfil the requirements for reinforced
insulation including creepage distances and clearances specified
in EN 60335.
Fig. 5 Connection terminals Pump I/O module
1: Digital input
9: GND (frame)
8: +24 V
7: Sensor input
B: RS-485B
Y: Screen
A: RS-485A
6: GND (frame)
5: +10 V
4: Setpoint input
3: GND (frame)
2: Start/stop

5.2 Three-phase pumps, 11-22 kW

Warning
The user or the installer is responsible for the
installation of correct earthing and protection
according to current national and local standards. All
operations must be carried out by qualified
personnel.
Warning
Never make any connections in the pump terminal
box unless all electric supply circuits have been
switched off for at least 5 minutes.
Note for instance that the signal relay may be
connected to an external supply which is still
connected when the mains supply is disconnected.
Warning
The surface of the terminal box may be above 70 °C
when the pump is operating.
5.2.1 Preparation
Before connecting the E-pump to the mains, take the issues
illustrated in the figure below into consideration.
L1
ELCB
L2
L3
PE
Fig. 6 Mains-connected pump with mains switch, backup
fuses, additional protection and protective earthing
5.2.2 Protection against electric shock - indirect contact
Warning
The pump must be earthed in accordance with
national regulations.
As the leakage current of 11-22 kW motors is
> 10 mA, take extra precautions when earthing these
motors.
EN 61800-5-1 specifies that the pump must be stationary and
installed permanently when the leakage current is > 10 mA.
One of the following requirements must be fulfilled:
• A single protective earth conductor having a cross-sectional
2
area of min. 10 mm copper.
Fig. 7 Connection of a single protective earth conductor
using one of the conductors of a 4-core mains cable
(with cross-sectional area of min. 10 mm
L1
L2
L3
2
)
9