A
A
B
B
Fig. 18: Minimum fluid level
NOTE
Compliance with dimension B does not guarantee trouble-free operation of the pump set.
Depending on the pump's duty point, higher fluid levels may be required. Observe the
NPSH values indicated in the characteristic curve (see hydraulic characteristic curves).
6.2.4 Density of the fluid handled
The power input of the pump increases in proportion to the density of the fluid
handled.
CAUTION
Excessive density of the fluid handled
Motor overload!
▷
Observe the information on fluid density indicated in the data sheet.
▷
Make sure the power reserve of the motor is sufficient.
6.2.5 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 supply voltage deviation is ±10%, for explosion-proof
pump sets ±5% of the rated voltage. The voltage difference between the individual
phases must not exceed 1%.
6.2.6 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 permissible in the frequency range
from 25 to 50 Hz.
6 Commissioning/Start-up/Shutdown
34 of 74
Amarex KRT
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 36 of 96
