En
gl
is
h (
G
B)
10
8. Electrical connection
The supply voltage and frequency are marked on the
pump nameplate. The permissible voltage tolerance
is - 10 %/+ 6 % of the rated voltage. Make sure that
the motor is suitable for the power supply available
at the installation site.
All pumps are supplied with 10 metres of cable and a
free cable end.
All pumps are supplied without a control box.
The pump must be connected to one of these two
controller types:
•
a control box with motor-protective circuit
breaker, such as a Grundfos CU 100 control box
•
a Grundfos LC, LCD 107, LC, LCD 108 or LC,
LCD 110 pump controller.
See fig. 4 or 5 and the installation and operating
instructions for the selected control box or pump
controller.
For more information about the function of the
thermal switches, see section
8.1 Wiring diagrams
Fig. 4
Wiring diagram for single-phase pumps
Fig. 5
Wiring diagram for three-phase pumps
Warning
Connect the pump to an external mains
switch which ensures all-pole
disconnection with a contact
separation according to EN 60204-1,
5.3.2.
It must be possible to lock the mains
switch in position 0.
Type and requirements as specified in
EN 60204-1, 5.3.2.
The electrical connection must be
carried out in accordance with local
regulations.
Warning
The pumps must be connected to a
control box with a motor protection
relay with an IEC trip class 10 or 15.
Warning
The permanent installation must be
fitted with earth leakage circuit breaker
(ELCB) with a tripping current < 30 mA.
Warning
Pumps installed in hazardous locations
must be connected to a control box
with a motor protection relay with an
IEC trip class 10.
Warning
The cross-section of the earth lead
must be at least 4 mm
2
, e.g. type H07
V2-K (PVT 90 °) yellow/green.
Make sure that the earth connection is
protected from corrosion.
Make sure that all protective equipment
has been connected correctly.
Note
Set the motor-protective circuit breaker
to the rated current of the pump.
The rated current is stated on the pump
nameplate.
TM0
2
558
7
4
3
0
2
TM
02
55
88
36
02
150
˚
C
160
˚
C
PE
1
2
3
6
4
5
1
T3
T2
T1
L
N
PE
150
˚
C
170
˚
C
PE
1
2
3
6
4
5
3
T3
T2
T1
L1
PE
L2 L3
