Answer / niraj

A surge protector (or surge suppressor) is an appliance designed to protect electrical devices from voltage spikes. A surge protector attempts to limit the voltage supplied to an electric device by either blocking or by shorting to ground any unwanted voltages above a safe threshold. This article primarily discusses specifications and components relevant to the type of protector that diverts (shorts) a voltage spike to ground; however, there is some coverage of other methods.

Answer / imran

SURGE protection are mostly used on discharge line of
compressor cause it's very heavy pressure it can cause
damage compressure & it's condition can may be create disaster

Answer / tukmol

surge protection such as check valves, pilot actuated surge
valves, vibration absorbing spings are used to protect and
prolong the life rating of the pipe lines usualy main pipe
lines, discharge, elbow connections and before valves.

Answer / guest

in hydro power plant....

the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove

0 Answers  

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how can calibrate transmitter online

2 Answers  

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when we calibrate the DP transmitter at that time which matrial we used in pressure pump?

4 Answers  

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if found error in magnetic flow meter?how can we adjust?

2 Answers   ANI Instruments, Techint,

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TCD Principle

1 Answers  

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how many types 0f thermocouples?

6 Answers   HZL,

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What is instrumentation control?

0 Answers  

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In control valve , Failure position : Close If it is Fail close(FC) during failure of AIR.. what will be the initial/ normal position of control valve is it normally open or close? please some one explain soon..

2 Answers  

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We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.

0 Answers   OPaL,

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Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...

0 Answers  

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How the flow can be measured by using DP Transmitter?

3 Answers  

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Explain PID controller tuning & any one method used for it.

1 Answers   L&T, Oil India,

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