Answer / jayamohanan

YOU HAVE TO CHECK THE OVER VOLTAGE SETTING OF THE VFD,THAT SHOULD BE ABOUT 420 TO 430 FOR THREE PHASE MOTORS AND 240-250 FOR SINGLE PHASE.

Answer / u.prabhagaran

motor or high capacity.

Answer / mithilesh k umar

it's reason related to load on motor.it takes more current
dabove the range.
ie bearing problem.

Answer / guest

over load

Distributed control system

1 Answers   CCIE,

---

cheapest instru-- PMMC, EDM, rectifier, thermocouple.

3 Answers   ONGC,

---

We are using Rosemount 5400 series Radar Level Transmitters in all types of Sump Applications having oily water hdrocarbon petrochemical nature. What we are facing the problem frequently is that always getting reading frezzed at some value. If we do power recycling , sometimes it is working . then making same freezing problem. If anybody faced before such type of problem and also having solution , Please give the answer.

0 Answers   Sabic,

---

List three types Level Gauges with their working principles

0 Answers   ABB,

---

A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?

0 Answers  

---

---

why we are using magnet for calibration of gas detector?

0 Answers   NSH,

---

How to find the range of DP cell Transmitter for measurement of level in closed vessel.

3 Answers   Rosemount,

---

if i want to make a zero trim for mass flow meter the pipe line should be empty or i need to make it full? i really need the answer pls help me

2 Answers  

---

any body please send me the old question papers of ongc test.

0 Answers   NTPC,

---

During valve sizing from all calculation you got flow coefficient CV 12,than what it means? like for selecting pressure transmitter if your MAWP is 12 bar than you select a capsule of max. 20 bar which cover your mawp 12 in same way for selecting control valve If CV is 12 than how we use it in selecting valve??????

1 Answers  

---

in a power plant main steam flow is volumetric or mass flow? is it required compensation?

1 Answers   Wartsila,

---

䑰ҕ䔈ҕ䖠ҕ䘰ҕ䛀ҕ䝐ҕ䟐ҕ䢐ҕ䥐ҕŹ

0 Answers  

---