en
Installation and operating instructions • Wilo-Flumen OPTI-TR 50-3 ... 120-1, Wilo-Flumen EXCEL-TRE 50-3 ... 90-2 • Ed.01/2022-07
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•
If people can come into contact with the device and conductive fluids, install a residual-
current device (RCD).
6.5.2
Maintenance tasks
•
Check the insulation resistance of the motor winding.
•
Check the resistance of the temperature sensors.
6.5.2.1 Checking the insulation resistance
of the motor winding
✓
Insulation tester 1000 V
1.
Check the insulation resistance.
⇒
Measured value at initial commissioning: ≥ 20 MΩ.
⇒
Measured value at interval measurement: ≥ 2 MΩ.
▶
Insulation resistance checked. If the measured values deviate from the specifica-
tions, consult the customer service.
6.5.2.2 Test the resistor of the temper-
ature sensor
✓
Ohmmeter available.
1.
Measure the resistance.
⇒
Measured value
Bimetallic strip
: 0 ohms (passage).
⇒
Measured value
3x PTC sensor
: between 60 and 300 ohm.
⇒
Measured value
4x PTC sensor
: between 80 and 400 ohm.
▶
Resistance checked. If the measured value deviates from the specification, consult
the customer service.
6.5.3
Connection of the three-phase AC
motor
•
Connection cable with bare cable ends.
•
The supplied connection diagram contains detailed information about the connection
cable:
–
Cable version
–
Wiring diagram
•
Connect the connection cable to the on-site control.
Wiring diagram of the direct starting power connection
U, V, W
Mains connection
PE (gn-ye)
Earth
Wiring diagram of the power connection for star-delta starting
U1, V1, W1
Mains connection (start of winding)
U2, V2, W2
Mains connection (end of winding)
PE (gn-ye)
Earth
6.5.4
Monitoring equipment connection
•
Refer to the attached connection diagram for more precise details regarding the version.
•
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.
Overview of possible monitoring devices for submersible mixers
without Ex rating
:
OPTI-TR 50-3 ...
EXCEL-TRE 50-3 ...
OPTI-TR 60-3 ...
EXCEL-TRE 60-3 ...
OPTI-TR 80-3 ...
OPTI-TR 90-2 ...
EXCEL-TRE 90-2 ...
OPTI-TR 120-1 ...
Motor compartment/sealing chamber
o
o
o
o
−
o
o
−
Pre-chamber (external pencil electrode)
o
o
o
o
o
o
o
o
Motor winding: Temperature limiter
•
•
•
•
•
•
•
•
Motor winding: Temperature controller and
limiter
o
o
o
o
o
o
o
o
Key
− = not possible, o = optional, • = standard
6.5.4.1 Motor compartment/sealing cham-
ber monitoring
Connect the electrodes via an evaluation relay. Relay “NIV 101/A” is recommended for this.
The threshold is 30 kOhm.
