Electrical Connection - Grundfos SEG Notice D'installation Et De Fonctionnement

9. Electrical connection

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 ground
fault circuit interrupter (GFCI) with a tripping current
< 30 mA.
Warning
Pumps installed in hazardous locations must be
FM
connected to a control box with a motor protection
relay with an IEC trip class 10.
Warning
Do not install Grundfos control boxes, pump
controllers, Ex barriers and the free end of the supply
cable in potentially explosive environments. 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 lead is connected to the external earth
terminal of the pump via a lead with a secure cable
clamp. Clean the surface for external earth
FM
connection and fit the cable clamp.
The cross-section of the earth conductor must be at
2
least 4 mm , 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.
Float switches used in potentially explosive
environments must be approved for this application.
They must be connected to the Grundfos SLC, DLC
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
Caution
current of the pump. The rated current is stated on
the pump nameplate.
Warning
If the pump has an FM mark on the nameplate, make
FM
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 33 ft (10 m) of cable and a free cable
end.
All pumps are supplied without a control box.
• The pump must be connected to a control box with motor-
protective circuit breaker.
See fig. 4 or 5 and the installation and operating instructions for
the selected control box or pump controller.
Potentially explosive environments
In potentially explosive environments you have one option:
• Use float switches made for Ex environment and a safety
barrier in combination with either DC, DCD or LC, LCD 108.
Warning
Before installation and the first start-up of the pump,
FM
check the condition of the cable visually to avoid
short circuits.
For more information about the function of the thermal switches,
see section
9.4 Thermal switches.
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