Electrical Connection - Grundfos UNILIFT AP35B Installation And Operating Instructions Manual

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 installation must be fitted with a re-
sidual-current device (RCD) with a trip-
ping current less than 30 mA.
DANGER
Electric shock
Death or serious personal injury
‐
Make sure that the power supply plug
delivered with the product is in compli-
ance with local regulations.
‐
The plug must have the same protec-
tive earth (PE) connection system as
the power outlet. If not, use a suitable
adapter if allowed by local regulations.
DANGER
Electric shock
Death or serious personal injury
‐
Power cables without a plug must be
connected to a supply disconnecting
device incorporated in the fixed wiring
according to the local wiring rules.
All electrical connections must be carried
out by a qualified person in accordance
with local regulations.
Depending on local regulations, a pump
with minimum 10 m of mains cable must
be used if the pump is used as a portable
pump for different applications.
Make sure that the product is suitable for the supply
voltage and frequency available at the installation
site. Voltage and frequency are marked on the pump
nameplate.
The pump must be connected to an external main
switch. If the pump is not installed close to the switch,
the switch must be of a lockable type.
Three-phase pumps must be connected to an
external motor-protective circuit breaker with
differential release. The rated current of the motor-
protective circuit breaker must correspond to the
electrical data marked on the pump nameplate.
If a level switch is connected to a three-phase pump,
the motor-protective circuit breaker must be
magnetically operated.
Single-phase pumps incorporate thermal overload
protection and require no additional motor protection.
If the motor is overloaded, it will stop auto-
matically. When the motor has cooled to
normal temperature, it restarts automati-
cally.
Wiring diagram
Pos. Description
1 Yellow and green
2 Grey
3 Brown
4 Black
N L
1 2
M
1~
Wiring diagram
Pos. Description
1 Yellow and green
2 Blue
3 Brown
-
3
9