Answer / prakash

If your concerns with domestic water pump dry run control,
then you can use a floating switch at level point that can
be connected to series with DOL starter if already installed.

Answer / jimmy

Just put level switch NC contact in series with overload
contacts in the Starter Circuit.

Answer / kamal

By using under current relay , setting is no load current,
below this level it trip.

Answer / parth belani

We can protect a pump from no load running by using a
minimum recirculation line. This line connects outlet with
the main tank or the inlet. so there will always be some
minimum flow through the pump.

Answer / raghu

Use a dryrun protection

Answer / sandip paithankar

put a moisture sensor in land which need to wet on starting and ending point of it.then give to transistor then micro controller do if else program and understand the condition of land it may wet or dry.then give command to relay to operate the water pump    

Answer / ks

by using the level transmitter and with out plc with some
no nc additional elements in the contactor it is possible
to control.

Answer / subrat.das1985

i think we can over come from this problem by using proximity sensor.or by using timer .

Answer / mkk

by using level transmitter. and use it in plc to switch off
the pump when level remains 20 %.

which %age if losses increases when frequency is increased to 25%

4 Answers   Maihar Cement, Siemens,

Why in metering Ct for ammeters ct secondary side is grounded for each Ct but not in case of CBCT (Core balance current transformer)..kindly some1 highlights the reason..is it because net flux is zero?

0 Answers  

Why two nos. un-tensioned wires are placed inside the PSC poles used by powergrid in RGGVY works.

2 Answers   Bhel, Power Grid,

how we can save electrical energy in industries,please give some inputs

3 Answers  

Why star delta starter is preferred with induction motor?

0 Answers  

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0 Answers  

after parallaing two generators current is shooting up in both the generators.for ex: load is 400 kw..after paralling and load sharing current in running gen is approx 900 amps and incoming is 750 amps which is too high when trying toshift the load current in incoming gen is coming more than 1300 amps and both getting tripped and making blackout..

3 Answers  

Why you want to join non technical field when you are an engineer?

0 Answers  

what is skin effect? why is it absentin dc system

22 Answers  

How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

0 Answers  

where the protection CT in neutral of transformer be located, before bifurcation or after bifurcation and why.

2 Answers  

when we use neutral line as grounding.

1 Answers