Answer Posted / pawan

There are three parts in AC drive
1. Rectifier ckt
2. Regulator
3. Invertor ckt (IGBT used)
Using AC drive we can change the frequency of motor by
varying the frequency of input/supply voltage.

where cascade loop use ?

1718

---

I want measure the volumetric flow of gas in waste heat recovery Boiler?Tell me how and which type of instruments required. Plz mail me:naba02222@gmail.com Sam please post the answer .

1971

---

Which type of pressure can be measured by primary elements?

1049

---

How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.

2147

---

What do you know about gail?

2475

---

how to change measuring units from mmwc to cubm/h in rosemount air flow transmitter with hart communicator fluke 744

2397

---

selection criteria of control valve? and selection criteria of actuator explain in brief?

4080

---

In my company plc based winders are operated. one day there was a data transmission failure alarm shown on pc. as per sir instruction we have reset master plc but winders were not triped and alarm gone. so what master plc do?

1873

---

Why do you want to work here

2332

---

Draw bode plot of any transfer function. Why is plotting bode necessary?

2518

---

what is the difference between active & reactive power?

2200

---

Regarding , there is an air cooler which control the fans(50% of AV FANS) by temperature in outlet , and the louver of Air cooler is controlled by HIC from control system , So if on Air cooler we will consider 2 individual I/P converter or positioner?

1764

---

what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.

2781

---

Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com

2261

---

how can leve transmetter calibate in feild .and also put cv and flow plz .....

2247

---