Grundfos SQF, Инструкция по установке и эксплуатации

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2. Lower the pump to the required depth and
complete the installation with a borehole seal.
3. Loosen the straining wire so that it becomes
unloaded and lock the straining wire to the
borehole seal with wire locks.
3.3 Electrical connection
DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply before you
start any work on the product.
‐
Make sure that the power supply can-
not be switched on accidentally.
DANGER
Electric shock
Death or serious personal injury
‐
The product must be earthed.
‐
Connect the product permanently to
the fixed wiring via an external main
switch with a minimum contact gap of 3
mm in all poles.
WARNING
Electric shock
Death or serious personal injury
‐
Do not lift the product by the power ca-
ble.
All electrical connections must be carried
out by a qualified electrician in accordance
with local regulations.
Check that the supply voltage and fre-
quency correspond to the values stated on
the nameplate.
If the power cable is damaged, it must be
replaced by the manufacturer, the manu-
facturer's service partner or a similarly
qualified person.
The cross-sectional area of the submersi-
ble drop cable must be large enough to
meet the voltage requirements.
Never connect the product to an external
frequency converter.
3.3.1 Residual-current circuit breakers
WARNING
Electric shock
Death or serious personal injury
‐
Use a suitable type of GFCI capable of
handling earth fault currents with DC
content (pulsating DC).
If the pump is connected to an electrical installation
where a ground fault circuit interrupter (GFCI) is used
for additional protection, this ground Fault Circuit
Interrupter shall be able to trip when ground fault
currents with DC content occur.
If national legislation requires a Residual Current
Device (RCD) or equivalent in the electrical
installation, this must be type B or better, due to the
nature of the constant DC leakage current.
The residual-current circuit breaker must be marked
like this:
TM066230
Take into account the total leakage current of all the
electrical equipment in the installation.
3.3.2 Wiring diagrams
N L
TM070523
Wiring diagrams for SQF
3.3.3 Motor protection
The product incorporates thermal protection against
slow overloading and blocking. No external motor
protection is required.
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English (GB)