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Traditionally dampers are used to control the quantity of air entering the boiler. If we use VFD for FD fan, we can control the quantity of air be changing speed of fan using VFD. This will save energy.
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What to do to reduce the noise generated because of VFD or Motor?
To reduce the noise generated because of VFD harmonics, line filters have to be used on the line side and load side of the VFD. The specific filters suppress the harmonic frequencies that the VFD generates when the SCR's are rapidly turning off and on.
Forced draft fan vs induced draft fan?
In a balanced draft boiler, you actually have both: forced draft (FD) fans supplying air to the furnace, and induced draft (ID) fans removing flue gas. Typically, the FD fans control airflow, while ID Fans control furnace pressure to slightly below atmospheric pressure. In general though, the choice between forced draft and induced draft is based on how "tight" the system is - if you have leaks, it is better to use ID, as FD will cause product loss.
How do you operate a vfd?
VFD is an adjustable speed drive that is used mostly in electro mechanical drive systems that control AC motor speed. VFD has come down on cost and the size which improved performance through advance in switching devices.
Why use VFD in motor control?
Type your answer here... I t saves lot of power for variable load drives,Like FD ,ID fans and Feed pumps .The centrifugal pump consumes almost constant power at the rated speed VFD helps to reduce the speed and Flow NAD HENCE POWER REDUCTION. It enables smooth start up of the pump and hence reduced maintenance cost of the Pipe lines. It improves the power factor and hence the GRID to supply less MVAR to the induction Motors. Less penalty to the power Boards.
What are the commands used in PC logo to make a square?
Type in pc logo software fd 40 rt 90 fd 40 rt 90 fd 40 rt 90 fd 40 done
Did VFD exist?
Yes because VFD means Volunteer Fire Department and there are many characters in it
How do you install a timer to a VFD?
You can either use the inbuild timer in VFD or go with secondary timer or a controller like PLC. You may use the below link to learn more on VFD www-dot-smeclabs-dot-com
What brands of VFD's are you familiar with?
NO
Is vfd real?
Yes
How do you make a star in LOGO?
to make a star on ms logo the commands should be: RT 20 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40
Command to make house in msw logo?
to house REPEAT 4 [fd 100 lt 90] fd 100 lt 90 REPEAT 3 [FD 100 RT 120] lt 90 fd 100 rt 90 fd 35 REPEAT 2 [FD 60 RT 90 FD 50 RT 90] fd -5 rt 90 REPEAT 2 [FD 40 RT 90 FD 25 RT 90] penup fd 60 pendown REPEAT 4 [FD 25 RT 90] end put that in Edall hope that helps by chloe who likes licking ou tpigs xxx
How do you make a star in ms logo?
to make a star on ms logo the commands should be: RT 20 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40 LT 70 FD 40 RT 140 FD 40
