8
ELECTRICAL CONNECTIONS
— Before starting work on the pump,
make sure that the pump and the
control panel are isolated from the
power supply and cannot be ener-
gized.
— If the pump is equipped with
automatic level control, there is
a risk of sudden restart.
— All electrical equipment must be
earthed. This applies to both pump
equipment and any monitoring
equipment. Failure to heed this
warning may cause a lethal acci-
dent. Make sure that the earth lead
is correctly connected by testing it.
— If persons are likely to come into
physical contact with the pump or
pumped media (liquid), e.g on con-
struction sites and farms, the
earthed (grounded) socket must
have an additional earth-(ground-)
fault protection device (GFI) con-
nected.
When pumping near a lake (jetties,
beaches, ponds, fountains etc) a
safety-distance of at least 20 m (65
ft) between the person and the
pump is applicable.
The pump must never be placed
directly into a swimming pool. If
used in connection with swimming
pools, special safety regulations
apply.
NOTE for Ex version page 3.
- All electrical work shall be carried out under the super-
vision of an authorized electrician.
- Local codes and regulations shall be complied with.
- Check on the data plate which voltage supply is valid
for your pump.
- Check that the main voltage and frequency agree with
the specifications on the pump data plate.
- If the pump can be connected to different voltages,
the connected voltage is specified by a yellow sticker.
- Connect the motor cable to the starter equipment as
illustrated in the wiring diagrams.
- When the pump is connected to the public mains it
may cause flicker of incandescent lamps when start-
ing. In this case the supply authority should be noti-
fied before installing the pump.
Conductors that are not in use must be isolated.
The cable should be replaced if the outer sheath is
damaged. Contact a Flygt service shop.
Make sure that the cable does not have any sharp
bends and is not pinched.
Under no circumstances may the starter equipment be
installed in the sump.
NOTE! For safety reasons, the earth conductor
should be approx. 50 mm (2.0") longer than the phase
conductors. If the motor cable is jerked loose by
mistake, the earth conductor should be the last
conductor to come loose from its terminal. This
applies to both ends of the cable.
Thermal contacts are incorporated in the stator. The
thermal contacts can be connected to max 250 V,
breaking current max 4 A. Flygt recommends that they
be connected to 24 V over separate fuses to protect
the other automatic equipment.
Make sure that the pump is correctly earthed (grounded).
When using a variable-frequency-drive (VFD) the
shielded cable (type NSSHÖU.../3E+St) should be
used in order to fulfil European CE requirements. Con-
tact your Flygt representative and ask your VFD-suppli-
er for electrical limitations.
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