Wilo -Flumen OPTI-TR 22 Instrucciones De Instalación Y Funcionamiento página 45

13.3 Ex rating
13.3.1 Identification of Ex-rated mixers
13.3.2 Protection class
13.3.3 Intended use
Installation and operating instructions Wilo-Flumen OPTI-TR 20-1, 22, 28-1, 30-1, 40-1, Wilo-Flumen EXCEL-TRE 20, 30, 40
Appendix
frequencies less than the rated frequency (50 Hz or 60 Hz) is adjusted to the power require-
ment of the mixer. More recent frequency converters feature an automatic power optimiza-
tion function - this automation achieves the same effect. For the frequency converter set-
ting, refer to the installation and operating instructions of the frequency converter.
Motor monitoring faults may occur if the motor is operated with a frequency converter. The
following measures can reduce or avoid these faults:
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Keeping within the limit values stated in IEC 60034‑25 for overvoltage and rise speed. If
necessary, install output filters.
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Vary the pulse frequency of the frequency converter.
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In the event of a fault in the internal sealing chamber monitoring, use the external dou-
ble-rod electrode.
The following construction measures can help to reduce or prevent faults:
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Separate connection cables for the main and control cable (depending on the motor size).
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Keep an adequate distance between main and control cable during routing.
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Use shielded connection cables.
Summary
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Min./max. frequency during continuous duty:
–
Asynchronous motors: 30 Hz up to rated frequency (50 Hz or 60 Hz)
–
Permanent magnet motors: 30 Hz up to the stated maximum frequency as per the
rating plate
NOTICE! Higher frequencies are possible following consultation with customer ser-
vice!
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Observe additional measures with regard to EMC regulations (choice of frequency con-
verter, using filters, etc.).
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Do not exceed the rated current or rated speed of the motor.
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Connection for bimetallic strip or PTC sensor.
This section contains further information on the operation of the mixer in an explosive at-
mosphere. All personnel must read this section. This section applies only to Ex-rated mix-
ers!
For use in explosive atmospheres, the mixer must be marked as follows on the rating plate:
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"Ex" symbol for the relevant approval
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Ex classification
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Certification number (depending on the approval)
The certification number, if required by the approval, is printed on the rating plate.
The motor's design version corresponds to the following protection classes:
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Flameproof enclosure (ATEX)
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Explosionproof (FM)
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Flameproof enclosures (CSA-EX)
In order to limit the surface temperature, the motor must be equipped with at least one
temperature limiter (1‑circuit temperature monitoring). A temperature controller (2‑circuit
temperature monitoring) is possible.
ATEX approval
The mixers are suitable for operation in potentially explosive atmospheres:
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Device group: II
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Category: 2, zone 1 and zone 2
Mixers must not be used in zone 0!
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