Answer / banerjeenandan

As the Generator output frequency remains constant usually
50Hz, so we have to control the speed of the turbine in
constant speed. Govorner takes the signal from Magnetic
Pickup Unit (MPU) and operates the govorning valve so that
the turbine rotates in constant speed.

The magnetic pickup unit is mounted on turbine front, facing
the gears of the gear wheel. Generally there remains 2 or 3
nos of sensors which measure the speed simultaneously. As
the turbine rotor rotates, the number of gear teeth cutting
by the sensor increases. This is counted at the sensor
itself. According to this the sensor sends an mA signal to
the govorner. And thus with respect to this, the govorner
takes action to open or close the Govorning valve to
regulate the flow of steam entering into turbine.

Answer / pankaj rathi

Mr.Banerjee ur answers is correct but the mpu does not send the ma to governor . But it send the ac voltage to governor. 

I am using Capacitive type level transmitter for measuring oil level in a closed tank (lub oil tank). The txs range is 1500mm, and they do hunt regularly (for about 45mm), can anybody tell what could be the reason??? or any other type level tx that could be used to avoid this?

1 Answers  

---

Can anybody explain about wellhead control system.

1 Answers  

---

Hi buddies! i am facing a problem and if someone could help me it will be an immense pleasure to me. we have compect logix PLC 1769 2L AO module to Heat @ 52 to 56 Deg C .So if anyone can do please help me out with this problem.I'll be highly grateful.

1 Answers   Cadila,

---

i have height of stem drum level 1000mm.how i calculate the DP transmitter

2 Answers  

---

what is dead weight tester and where it is used?.

11 Answers   DuPont, Jain steels,

---

what is exat meaning of compentation in RTD ? what diffrent between 2 wire,2 wire and 4 wire RTDs?

2 Answers   Atul, Vardhman,

---

what is the meaning of Domain server?

2 Answers  

---

What is the diffrence between ff tx and non ff tx

0 Answers   Jindal, Rosemount,

---

I HAVE GOT TYPICAL PROBLEM WITH THE TEMP.INDICATION. THE PROBLEM IS THE K-TYPE T/COUPLE OUT PUT IS CONNECTED TO A INDICATOR.THE INDICATION FLUCTUATES SOME TIMES AND SOME TIME IT IS STABLE. WHEN I CHECKED OUT PUT OF T/COUPLE THE MV WILL NOT VARY. WHERE AS INDICATION FLUCTUATES. WHEN I GIVE MV SOURCE TO T/COUPLE EXTENSIONCABLE FROM THE FIELD IT INDICATION IS STABLE. WHEN GIVE MV SORCE TO INDICATOR ITS INDICATION IS STABLE. PLEASE CLARIFY.

5 Answers  

---

what is meant by nuclear collector?

0 Answers  

---

why r using 250 resistances

6 Answers   Sabic, Samsung,

---

How to calibrate DP tramitter in flow measurement application? consider my range of flow is 0 to 2000 kg/hr ? please give calculation of , How much pressure applied on low pressure side and high pressure side please give detail of calculation .... It so important for me please reply as soon as possible

1 Answers  

---