KSB Amarex N, Operating Manual

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6 Commissioning/Start-up/Shutdown
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Amarex N
6.2 Operating limits
DANGER
Non-compliance with operating limits
Damage to the pump set!
▷
Comply with the operating data indicated in the data sheet.
▷ Avoid operation against a closed shut-off element.
▷ Never operate an explosion-proof pump set at ambient and fluid temperatures
exceeding those specified in the data sheet or on the name plate.
▷
Never operate the pump set outside the limits specified below.
6.2.1 Frequency of starts
CAUTION
Excessive frequency of starts
Risk of damage to the motor!
▷ Never exceed the specified frequency of starts.
To prevent high temperature increases in the motor, do not exceed the following
number of start-ups per hour.
Table 14: Frequency of starts
Interval Maximum frequency of starts
[No. of starts]
per hour 30
per year 5000
These values apply to mains start-up (DOL, autotransformer, soft starter). Frequency
inverter operation is not limited by these values.
6.2.2 Supply voltage
DANGER
Non-compliance with permissible supply voltage tolerances
Explosion hazard!
▷ Never operate an explosion-proof pump (set) outside the specified range.
The maximum permissible deviation in supply voltage is ±10% of the rated voltage.
The voltage difference between the individual phases must not exceed 1%.
6.2.3 Frequency inverter operation
DANGER
Operation outside the permitted frequency range
Explosion hazard!
▷ Never operate explosion-proof pump sets outside the specified range.
Frequency inverter operation of the pump set is permitted in the following frequency
ranges:
▪
50 Hz:
30 to 50 Hz
▪
60 Hz:
30 to 60 Hz