Three-Phase Motor Connection; Operation With Frequency Converter; Commissioning; Personnel Qualifications - Wilo EMU FA Instrucciones De Instalación Y Funcionamiento

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6.5.4

Three-phase motor connection

PE U V
M 3~
Fig. 8: Connection diagram three-phase cur-
rent motor
6.5.5 Monitoring device connection
6.5.5.1 Sealing chamber monitoring (ex-
ternal electrode)
6.5.6 Motor protection adjustment
6.5.6.1 Direct activation
6.5.7 Operation with frequency con-
verter
7

Commissioning

7.1

Personnel qualifications

7.2

Operator responsibilities

52
Commissioning
W
Wire colour
Brown (bn)
Black (bk)
Grey (gy)
Green/yellow (gn-ye)
The three-phase current version is supplied with bare cable ends. Connection to the
mains is established by connecting the power supply cables in the switchgear. Refer to
the attached connection diagram for more precise details regarding the connection.
Electrical connection must always be carried out by a qualified electrician!
NOTICE! The individual wires are designated according to the connection diagram.
Do not cut the wires! There is no additional assignment between the wiring diagram
and connection diagram.
All monitoring device must be connected!
Connect the external electrode via an evaluation relay. Relay "NIV 101/A" is recommen-
ded for this. The threshold is 30 kOhm.
When the threshold is reached, a warning must be given 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 recommended!
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 5 % above the cur-
rent measured at the duty point.
Operation on the frequency converter is not permitted.
WARNING
Foot injuries due to a lack of protective equipment!
Danger of (serious) injuries during work. Wear safety shoes!
▪ Electrical work: A qualified electrician must carry out the electrical work.
▪ Operation/control: Operating personnel must be instructed in the functioning of the
complete system.
▪ Providing installation and operating instructions by the pump or at a place specially re-
served for it.
▪ Making the installation and operating instructions available in the language of the per-
sonnel.
▪ Making sure that the installation and operating instructions are read and understood by
all personnel.
▪ All safety devices and emergency cut-outs on the system-side must be active and
checked to ensure that they work properly.
▪ The pump is suitable for use under the specified operating conditions.
Designation
U
V
W
Earth
Terminal
L1
L2
L3
PE
WILO SE 2018-02