Wilo -Flumen EXCEL-TRE 20 Installation And Operating Instructions Manual page 83

13.3.4.3 Frequency converter operation
13.3.5 Commissioning
13.3.6 Maintenance and repair
13.3.6.1 Repair of housing coating
13.3.6.2 Replacing the connection cable
13.3.6.3 Changing the mechanical seal
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
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Converter type: Pulse-width modulation
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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
rating plate
NOTICE! The maximum frequency may be below 50 Hz!
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Min. switching frequency: 4 kHz
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Max. overvoltage at the terminal board: 1350 V
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Output current at the frequency converter: max. 1.5 times rated current
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Max. overload time: 60 s
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Torque applications: quadratic pump curve or automatic energy optimisation pro-
cedure (e.g. VVC+)
Required speed/torque curves are available on request!
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Observe additional measures with regard to EMC regulations (choice of frequency
converter, filters, etc.).
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Do not exceed the rated current or rated speed of the motor.
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It must be possible to connect the motor's own temperature monitoring (bimetallic
strip or PTC sensor).
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If the temperature class is marked as T4/T3, temperature class T3 applies.
DANGER
Risk of explosion when using non-Ex-rated mixers!
Risk of fatal injury due to explosion! Only use mixers which have Ex labelling on the
rating plate within potentially explosive areas.
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The operator is responsible for defining the potentially explosive area.
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Only Ex-rated mixers may be used within potentially explosive areas.
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Mixers with an Ex rating must be labelled as such on the rating plate.
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Do not exceed the max. fluid temperature!
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According to DIN EN 50495, a safety device with SIL level 1 and hardware fault toler-
ance 0 must be provided for category 2.
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Carry out maintenance tasks according to the regulations.
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Only carry out maintenance tasks described in these installation and operating in-
structions.
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The spark-proof gaps must only be repaired according to the manufacturer's design
specifications. Carrying out repairs according to the values in tables 1 and 2 of DIN
EN 60079-1 is not permitted.
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Only use screws as stipulated by the manufacturer, which at a minimum correspond
to a strength class of 600 N/mm² (38.85 long tons-force/inch²).
The paint layer can become electrostatically charged in case of thicker
coats.DANGER! Risk of explosion! In explosive atmospheres, a discharge can cause
an explosion!
If the housing coating has to be repaired, the maximum coat thickness is 2 mm
(0.08 in)!
Changing the connection cable is strictly prohibited!
Changing the seal on the motor side is strictly prohibited!
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