Wiring Diagrams - Grundfos SEG Serie Montage- Und Betriebsanleitung

Warning
Do not install Grundfos control boxes,
pump controllers, Ex barriers and the
free end of the supply cable in
potentially explosive environments.
The explosion protection classification
of the pump is CE 0344
IIB T4 X. The classification of the
installation site must be approved by
the local firefighting authorities in each
individual case.
On explosion-proof pumps, make sure
that an external earth conductor is
connected to the external earth
terminal of the pump via a lead with a
secure cable clamp. Clean the surface
for external earth connection, and fit
the cable clamp.
The cross-section of the earth
conductor must be at least 4 mm
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.
Float switches used in potentially
explosive environments must be
approved for this application.
They must be connected to the
Grundfos LC, LCD 108 pump controller
via the intrinsically safe LC-Ex4 barrier
to ensure a safe circuit.
Warning
If the supply cable is damaged, it must
be replaced by the manufacturer, its
service agent or similarly qualified
persons.
Set the motor-protective circuit breaker
to the rated current of the pump.
Caution
The rated current is stated on the pump
nameplate.
Warning
If the pump has an Ex mark on the
nameplate, make sure that the pump is
connected in accordance with the
instructions given in this booklet.
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.
II 2 G Ex d
instructions for the selected control box or pump
controller.
Potentially explosive environments
In potentially explosive environments you have two
options:
• Use float switches made for Ex environment and
a safety barrier in combination with either
DC, DCD or LC, LCD 108.
• Use air bells in combination with LC, LCD 107.
2
, e.g.
For more information about the function of the
thermal switches, see section

8.1 Wiring diagrams

Fig. 4
Fig. 5
4 or 5 and the installation and operating
Warning
Before installation and the first start-up
of the pump, check the cable for visible
defects to avoid short circuits.
8.4 Thermal
L N
PE
PE
1 2 3 4 5 6
T2 T1 T3
˚ ˚
160 C 150 C
1
Wiring diagram for single-phase pumps
L1 L2 L3
PE
PE
1 2 3 4 5 6
T2 T1 T3
˚ ˚
170 C 150 C
3
Wiring diagram for three-phase pumps
switches.
15