Electrical Connection - Three-Phase Pumps, 11-22 Kw; Preparation; Protection Against Electric Shock - Indirect Contact - Grundfos TPE 2000-Serie Installationsanleitung

NC C
0-10 V
0/4-20 mA 4-20 mA
0/1
B Y A 1 9 8 7
STOP
RUN
0/4-20 mA 0-10 V
10K
6 5 4 3 2
Fig. 9 Connection terminals - TPED Series 2000
A galvanic separation must fulfil the requirements for reinforced
insulation including creepage distances and clearances specified
in EN 60335.
12
NO L1 L2 L3
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
5.3 Electrical connection – 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.

5.3.1 Preparation

Before connecting the E-pump to the mains, take the issues
illustrated in the figure below into consideration.
L1
L2 ELCB
L3
PE
Fig. 10 Mains-connected pump with mains switch, backup
fuses, additional protection and protective earthing

5.3.2 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. 11 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
)