Electrical Connection; Power Supply Failure - Grundfos SB Serie Montage- Und Betriebsanleitung

3.6 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 cannot be
accidentally switched on.
- The pump must be earthed.
DANGER
Electric shock
Death or serious personal injury
- The protective earth of the socket outlet
must be connected to the protective
earth of the pump. The plug must
therefore have the same PE connection
system as that of the socket outlet. If
not, use a suitable adapter.
We recommend that you fit the permanent
installation with a residual-current circuit
breaker, RCCB, with a tripping current less
than 30 mA.
DANGER
Electric shock
Death or serious personal injury
- If the pump is used for cleaning or other
maintenance of swimming pools,
garden ponds or similar places, make
sure that the pump is supplied through a
residual-current circuit breaker, RCCB,
with a tripping current of 30 mA.
DANGER
Electric shock
Death or serious personal injury
- Connect pumps that are delivered
without cable and/or plugs to an
external main switch with a minimum
contact gap of 3 mm in all poles.
Make sure that there is at least 3 m free
cable above the liquid level.
Check that the supply voltage and frequency
correspond to the values stated on the pump
nameplate.
The electrical connection must be carried out by an
authorised electrician in accordance with local
regulations.
10
3.6.1 Thermal protection
The pump has a built-in thermal switch and requires
no additional motor protection. If the pump is running
without water, or if it is otherwise overloaded, the
built-in thermal switch will cut out. When the motor
has cooled to normal temperature, it will restart
automatically.
3.6.2 Connecting to external controller
SB
SB pumps must be connected to an external
controller. We recommend a Grundfos Pressure
Manager: net.grundfos.com/qr/i/97506325
SBA
SBA pumps have an integrated control unit.
SB HF
SB HF pumps must be connected to an external
controller. We recommend a Grundfos Pressure
Manager: net.grundfos.com/qr/i/97506325

3.6.3 Power supply failure

In case of a power supply failure, the pump restarts
automatically when power returns and runs for at
least 10 s.