Adjustment Of The Motor Protection; Operation With Frequency Converter; Commissioning; Personnel Qualifications - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

6.5.6 Adjustment of the motor protec-
tion
6.5.6.1 Direct start-up
6.5.6.2 Star-delta activation
6.5.6.3 Soft starter
6.5.7 Operation with frequency con-
verter
7

Commissioning

7.1

Personnel qualifications

7.2

Operator's obligations

7.3 Direction of rotation check
(three-phase motors only)
Installation and operating instructions Wilo-Rexa PRO
Commissioning
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!
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!
WARNING
Foot injuries due to a lack of protective equipment!
During work there is a risk of (serious) injury. Wear safety shoes!
▪ Electrical work: A qualified electrician must carry out the electrical work.
▪ Operation/control: Operating personnel must be trained in the operating principle of the
complete system.
▪ Provision of the 'Installation and operating instructions' at the pump or at a place designated
for these.
▪ Provision of the 'Installation and operating instructions' in the language of the personnel.
▪ Ensure that all personnel have read and understood the 'Installation and operating instruc-
tions'.
▪ All system safety devices and emergency cut-outs are active and have been checked to en-
sure that they work properly.
▪ The pump is suitable for use under the specified operating conditions.
At the factory the pump is checked and set to the correct direction of rotation for a clock-
wise rotating field. The connection is made according to the information in the "Electrical
connection" section.
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