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6.5.4.6
Monitoring of motor bearing
6.5.4.7
Monitoring of vibration occurring
due to operation
6.5.4.8
Sealing chamber monitoring (ex-
ternal electrode)
6.5.5
Adjustment of the motor protec-
tion
6.5.5.1
Direct start-up
6.5.5.2
Star-delta activation
6.5.5.3
Soft starter
6.5.6
Operation with frequency con-
verter
36
Installation and electrical connection
Connect the Pt100 sensor via an evaluation relay. Relay "DGW 2.01G" is recommended for
this. The threshold is 100 °C (212 °F).
Wiring diagram
Pt100 sensor connection
T1, T2
When the threshold is reached, deactivation must take place!
Connect the vibration sensor via a suitable evaluation relay. For more precise details on con-
nection of the vibration sensor, see the installation and operating instructions of the evalu-
ation relay.
The limit values must be set during commissioning and recorded in the commissioning
log. When the threshold is reached, deactivation must take place!
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 output or the unit must be switched
off.
CAUTION
Connection of the sealing chamber control
If there is only a warning when the threshold is reached, the pump could be irreparably
damaged by water ingress. It is always recommended to switch off the pump!
Note the additional information in the chapter on potentially explosive areas found in
the appendix!
The motor protection must be set depending on the selected activation type.
At full load, set the motor protection switch to the rated current (see rating plate). At partial
load, it is recommended to set the motor protection switch to 5 % above the measured cur-
rent in the duty point.
The motor protection setting depends on the installation:
▪ Motor protection installed in the motor line: Set the motor protection to 0.58 x the rated
current.
▪ Motor protection installed in the power supply cable: Set the motor protection to the rated
current.
The maximum start-up time in star connection is 3 seconds.
At full load, set the motor protection switch to the rated current (see rating plate). At partial
load, it is recommended to set the motor protection switch to 5 % above the measured cur-
rent in the duty point. Furthermore, observe the following points:
▪ Current consumption must always be lower than the rated current.
▪ Complete starting and stopping within 30 s.
▪ To avoid power dissipation, bypass the electronic starter (soft start) once normal operation
is reached.
Operation on the frequency converter is permitted. Refer to the appendix for the relevant
requirements!
WILO SE 2019-01
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