Wilo Rexa FIT Serie Notice De Montage Et De Mise En Service page 46

en
Blue (bu) N
Green/yellow (gn-ye) Earth
The single-phase current version is equipped with a
shockproof plug. The connection to the mains is estab-
lished by inserting the plug into a socket. The plug is not
overflow-proof. Install the socket so that it is over-
flow-proof! Observe the information on the protection
class (IP) of the plug.
DANGER! If the pump is connected directly to the
switchgear, dismantle the plug and arrange for the
electrical connection to be carried out by a qualified
electrician!
6.5.4 Three-phase current motor connection
PE L1
M 3~
Fig. 8: Connection diagram three-phase current motor
Wire number Designation
1 20
2 21
3 U
4 V
5 W
Green/yellow (gn-ye) Earth
For three-phase current motors, a clockwise rotating
field must be available. The three-phase current version
is equipped with a CEE plug or with a bare cable end:
▪ If a CEE plug is supplied, connection to the mains is es-
tablished by inserting the plug into a socket. The plug is
not overflow-proof. Install the socket so that it is over-
flow-proof! Observe the information on the protection
class (IP) of the plug.
▪ If there is a bare cable-end, the pump must be connec-
ted directly to the switchgear. DANGER! If the pump is
connected directly to the switchgear, arrange for the
electrical connection to be carried out by a qualified
electrician!
46
L2 L3 20 21
Terminal
WSK
WSK
L1
L2
L3
PE
Installation and electrical connection
6.5.5 Monitoring device connection
All monitoring device must be connected!
6.5.5.1 Monitoring of motor winding
Single-phase current motor
Thermal motor monitoring is self-switching for single-
phase current motors. The monitoring function is always
active and does not need to be connected separately.
Three-phase current motor with bimetallic strip
Bimetallic strips are directly connected to the switchgear
or via an evaluation relay.
Connection values: max. 250 V (AC), 2.5 A, cos φ = 1
When the threshold is reached, deactivation must take
place.
In the version with an attached plug, the thermal motor
monitoring is pre-wired and set to the correct value in
the plug.
6.5.5.2 Sealing chamber monitoring (external electrode)
Connect the external electrode via an evaluation relay.
Relay "NIV 101/A" is recommended for this. The
threshold is 30 kOhm.
Once the threshold is reached, a warning must be out-
put or the unit must be switched off.
CAUTION
Connection of the sealing chamber control
If on reaching the threshold, there is only a warning,
the pump could be irreparably damaged by the water
ingress. Deactivation of the pump is always recom-
mended!
6.5.6 Motor protection adjustment
Motor protection must be set depending on the selected
activation type.
6.5.6.1 Direct activation
At full load, set the motor protection switch to the rated
current (see rating plate). At partial load, it is recommen-
ded to set the motor protection switch 5 % above the
current measured at the duty point.
6.5.6.2 Soft starter
At full load, set the motor protection switch to the rated
current (see rating plate). At partial load, it is recommen-
ded to set the motor protection switch 5 % above the
current measured at the duty point. The following points
must also be observed:
▪ Power consumption must always be below the rated cur-
rent.
▪ Complete starting and stopping within 30 s.
WILO SE 2019-02