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The water pump control system of fan |
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Used in the control system
for the fire control, the pollution discharge and the
domestic pump
[model meaning]
[Product
brief introduction]
the KWK series control cabinet, which has the protection
functions for under pressure, overflow and so on and
the function of manual, self-action, rotation of accidents,
showing the running states and the feedback of information,
is widely applied in the control system for kinds of
water pump and fan in the industry and mining, the enterprise,
the public building and so on. The system also may carry
the special design and production through the user's
actual situation to completely satisfy each kind of
request for the users. |
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Ordinary
control cabinet
[Control type and lectotype
plan]
A. The control of liquid level (expressed
with L): When the control of liquid level is running automatically,
the start and stop of the water pump are controlled by the
set-up on-off liquid level (common ball float establishment).
The control of liquid level is generally used in situation
of water supply to the basin or water tank.
B. The pressure control (expressed with P):
When the pressure control is running automatically, the start
and stop of the water pump are controlled by the set-up pressure
(common electric contact manometer establishment). The pressure
control is generally used in situation of water supply to
the pipe network directly, for example, the water supply for
life and kinds of constant voltage control system.
C. The temperature control (expressed with
T): When the temperature control is running automatically,
the start and stop of the water pump are controlled by the
set-up temperature (common temperature control device establishment).
The control is generally used in boiler system.
D. The time control (expressed with S): When
the time control is running automatically, the start and stop
of the water pump are controlled by the set-up time (common
time control device establishment). The control is generally
used in the situation of regular water supply, such as the
school and business building.
E. The control of air condition (expressed
with C): When the control of air condition is running automatically,
the start and stop of the water pump are controlled by the
linked signal of the air condition system.
F. The fire special-purpose control (expressed
with X): When the fire special-purpose control is running
automatically, the start and stop of the water pump are controlled
by the fire alarm of the fire control system.
G. The sewage pump control (expressed with
W): When the sewage pump control is running automatically,
the start and stop of the water pump are controlled by the
set-up liquid level of polluted water (common ball float establishment)
H. The manual control (expressed with M):
When the manual control is not running automatically, the
start and stop of the water pump are controlled by the manual
on-off button.
From the analysis above, we should choose the control mode
based on the suitable automatic running situation and functions
of the water pump.
[switching mode and lectotype
plan of main pump and stand-by pump]
A. The manual switchover (expressed with
H): The choice between the main pump and the stand-by pump
depends on the switchover button on the control panel. The
manual switchover is generally used in the situation of few
times of water pump starting and little time of running, for
example: situations of fire control, pollution discharge and
so on.
B. Fixed automatic switchover (expressed
with AS): The choice between the main pump and the stand-by
pump switches automatically depending on the fixed time.
That is to say if the fixed switching time is 8 hours, the
1# pump runs for 8 hours and switches to another pump automatically,
and the 2# pump switches again in the same way after 8 hours.
The automatic switchover is generally used in the places of
few times of water pump starting and long running time, such
as the conditioning circulation.
C. The automatic alternating switchover (expressed
with AC): The alternating switchover between the main pump
and the stand-by pump is when activating signal comes, the
1# pump starts, and the 1# pump stops as soon as the activating
signal disappears. But when the next activating signal comes,
the 2# pump starts. It is generally used in the situation
of frequent starting times and little running time, such as
the constant voltage system.
Synthesizing the analysis above, we choose switchover way
of the main pump and the stand-by pump according to the on-off
situation and the length of running time.
[The number and power of the
control water pump]
Choose the type according to the quantity and the power
of water pump which are actually chosen by users.
[characteristics of starting
way and lectotype plan]
A. The direct-on starting (direct-on starting
when there is no indication): It is generally worked with
the water pump below 15KW.
B. The starred and triangle reduced voltage
starter (expressed with Y): When the water pump starts, the
line is starred junction, and switches to the triangle running
while the running finishes. It is generally worked with the
18.5KW-37KW water pump, and the initial firing current of
is about 3.5 times larger than the nominal current.
C. the auto transfer reduced voltage starter
(expressed with Z): When the water pump starts, it reduces
the initial firing current, and the pump runs with total voltage
after the starting finished. It is generally worked with 45KW-75KW
water pump.
D. The soft start (expressed with R): when
the water pump starts, it smoothly starts depending on the
soft starter, and the pump runs with total voltage after the
starting finished. It is generally worked with the water pump
the power of is upper than 90KW.
Synthesizing the analysis above, we choose starting way
of the water pump according to the power range. |
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