8
5.1 Electrical connection – single-phase pumps
5.1.1 Preparation
Before connecting the E-pump to the mains, take the issues
illustrated in the figure below into consideration.
Fig. 2
Mains-connected pump with mains switch, backup
fuse, additional protection and protective earthing
5.1.2 Protection against electric shock – indirect contact
Protective earth conductors must always have a yellow/green
(PE) or yellow/green/blue (PEN) colour marking.
5.1.3 Backup fuses
For recommended fuse sizes, see section
5.1.4 Additional protection
If the pump is connected to an electric installation where an earth
leakage circuit breaker (ELCB) is used as additional protection,
the circuit breaker must be of a type marked with the following
symbol:
The total leakage current of all the electrical equipment in the
installation must be taken into account.
The leakage current of the motor in normal operation can be seen
in section
During start and at asymmetrical supply systems, the leakage
current can be higher than normal and may cause the ELCB to
trip.
5.1.5 Motor protection
The pump requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking (IEC 34-11, TP 211).
5.1.6 Protection against mains voltage transients
The pump is protected against voltage transients by built-in
varistors between phase-neutral and phase-earth.
5.1.7 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 electricity
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.
Grid types
Single-phase E-pumps can be connected to all grid types.
5.1.8 Start/stop of pump
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.
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.
The above warning is indicated on the motor terminal
box by this yellow label:
Warning
The surface of the terminal box may be above
70 °C when the pump is operating.
T
M
02
07
92
01
01
Warning
The pump must be earthed and protected against
indirect contact in accordance with national
regulations.
___
) ) )
( ( (
N
PE
L
N
L
PE
ELCB
ELCB
TM
02
08
27
21
07
Warning
If the supply cable is damaged, it must be
replaced by qualified personnel.
Warning
Do not connect single-phase E-pumps to a mains
supply with a voltage between phase and earth of
more than 250 V.
Caution
The number of starts and stops via the mains
voltage must not exceed 4 times per hour.
PE
L
N
