My friend has
faced this
question! I
don't know
clearly. So
please anyone
give me the
correct and
short answer to
this question?
What is variable
frequency drive?
Types, what is
star to delta?
Why this
arrangement
necessary?
Answer Posted / hitesh kareliya
VFD Means Variable Frequency Drive,So that means we
controll the Pump's RPM via VFD in desired frequency.
Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
Calibration of controller (pneumatic)
Draw a P& ID showing – orifice flange, plate, dp transmitter, isolation & bypass valves and tubing.
1. For Steam drum level signal, why do we compensate with drum pressure signal? 2.For main steam Flow signal is comensated with main steam temperature signal and main steam pressure signal why?
Type of level transmitter commnly used in Procees area are the following. a.________________This type of level transmitter works as follows
What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?
Which products are available in the Mass Systemswitch and System Manager AC range?
what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ?
In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.
Explain the use of hair spring in the pressure gauge.
few questions on RS 232,1 question on relationship of impedance and turns ratio, many questions on flowmeters
Why trim span ? How?
What is the GK Value in Flowmeter?
What is the Working principle of Dozing valve?
what diffrence b/w plc s7200,300,400
What is Predictive Maintenance