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We have created
new technology. The
pump's motor receives the power gradually, from the start of
movement to its maximum speed in three seconds, bringing the pump out of the
stand still condition so the high peak current of normal start is
eliminated and mechanical stress greatly minimized.
Electricity
commissions around the world are restricting the start of motors to a
limited peak of current. Typically when power is switched ON to a motor a
high peak of current consumption occurs, this can reach over 100 Amps more
or less depending on the size of the motor. Some larger motors can peak to
over 500 Amps at the starting instance. This causes great disturbances to
the electricity supply.
Pumptron complies
with the regulations, but it wasn't the only reason for this development;
it was because of the many problems associated with the starting of
submersible pumps.
Lets analyse: When a
pump is standing still together with the water waiting to be pumped, there
is no movement, but suddenly power arrives, in full;
before movement begins, the motor generates a high peak of current as the
energy is not transformed immediately into motion, almost a short circuit,
this could cause the motor winding to leak to earth. Then movement begins
and in a fraction of a second it reaches maximum speed. The pump's
impellers that were standing immersed in the standing water suffer this
shock of energy that creates great stress. The axis that transmit the
force to the impellers also suffers the breaking effect of the water; some
twisting effect in the axis causes stress in the bearings. The motor's
rotor, gaining full speed in a fraction of a second, causes a counter
rotation of the entire motor and pump, creating physical stress in the
pipe.
In order to avoid
this from happening repeatedly, companies advise that the water flow be
adjusted restrictedly according to the bore water production, so the pump
runs continuously. This significantly increases power consumption; if the
amount of water produced by a bore in a day can be pumped out at full
thrust in four hours of pumping, running it continuously results in extra
twenty hours of unnecessary power consumption, therefore increasing the
power bill accordingly.
ALL OF THIS IS WHY
WE DEVELOPED PUMPTRON 1PH-SS - "SOFT START TECHNOLOGY"
Pumptron 1PH-SS
now available
Recommended for
Single Phase pumps from 10 Amps to 30 Amps
120 & 240 Volts
Three phase soft start units
availability to be advised. |
