Cable Glands - Grundfos E Serie Instrucciones De Instalación Y Funcionamiento

5.2.5 Motor protection
The pump requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking (IEC 34-11, TP 211).
5.2.6 Protection against mains voltage transients
The pump is protected against voltage transients by built-in
varistors between phase-neutral and phase-earth.
5.2.7 Supply voltage and mains
1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz, PE.
The supply voltage and frequency are marked on the pump
nameplate. Make sure that the motor 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 earth conductor which must
be so long that it is the last one to be disconnected in case the
cable is inadvertently pulled out of the cable entry.
Fig. 3 Mains connection

Cable glands

Cable glands comply with EN 50626.
2 x M16 cable gland, cable diameter ∅4-∅10
•
1 x M20 cable gland, cable diameter ∅10-∅14
•
• 1 knock-out cable entry for M16 cable gland.
Warning
If the supply cable is damaged, it must be replaced
by qualified staff.
Grid types
Single-phase E-pumps can be connected to all grid types.
Warning
Do not connect single-phase E-pumps to a mains
supply with a voltage between phase and earth of
more than 250 V.
5.2.8 Start/stop of pump
The number of starts and stops via the mains voltage
Caution
must not exceed 4 times per hour.
When the pump is switched on via the mains, it will start after
approx. 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 will
start immediately.
5.2.9 Connections
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.
N
Group 2: Output (relay signal, terminals NC, C, NO)
PE
The output (group 2) is galvanically separated from other circuits.
L
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)
Group 4: Communication cable (8-pin male socket) - only
TPED
The communication cable is connected to the socket in group 4.
The cable ensures communication between the two pumps,
whether one or two pressure sensors are connected. See section
5.7 Communication cable for TPED
The selector switch in group 4 enables changeover between the
operating modes "alternating operation" and "standby operation".
See description in section
TPED pumps.
NC C NO
0-10 V
0/4-20 mA
0/4-20 mA
Fig. 4 Connection terminals - TPE, NKE, NKGE and NBE,
NBGE
pumps.
6.2.1 Additional operating modes -
N PE L
1: Digital input
9: GND (frame)
4-20 mA 8: +24 V
7: Sensor input
0/1
B: RS-485B
1 9 8 7 B Y A
Y: Screen
A: RS-485A
STOP
RUN
6: GND (frame)
5: +10 V
0-10 V
10K
4: Setpoint input
3: GND (frame)
2: Start/stop
6 5 4 3 2
7