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NOTICE! For motors with an integrated capacitor,
short-circuit the windings prior to checking!
6.5.2.2 Test the resistor of the temperature sensor
Measure the resistor of the temperature sensors with
an ohmmeter. The bimetallic strips must have a meas-
ured value of 0 Ohm (passage).
6.5.3
Connection of the single-phase motor
PE
Fig. 8: Connection diagram single-phase motor
Wire colour
Terminal
Brown (bn)
L
Blue (bu)
N
Green/yellow (gn-
Earth
ye)
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
overflow-proof! Observe the information on the pro-
tection 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
Connection three-phase motor
PE
L1
L2
M 3~
Fig. 9: Connection diagram three-phase motor
Wire number
Designation
1
20
Installation and operating instructions Rocsan neo
Installation and electrical connection
N
L
C r
M 1~
L3
20
21
Terminal
WSK
2
21
3
U
4
V
5
W
Green/yellow (gn-
Earth
ye)
For three-phase current motors, a clockwise rotating
field must be available. The three-phase version is
equipped with a CEE plug or with a free 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
overflow-proof! Observe the information on the pro-
tection class (IP) of the plug.
▪ If there is a free 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!
6.5.5
Monitoring equipment connection
All monitoring equipment 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 al-
ways active and does not need to be connected separ-
ately.
Three-phase current motor with bimetallic strip
Bimetallic strips are connected in the switchgear itself
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.
6.5.6
Motor protection adjustment
Motor protection must be set depending on the selec-
ted 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 re-
commended 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 re-
commended to set the motor protection switch 5 %
en
WSK
L1
L2
L3
PE
45
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