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. 

what can of fault ofently come in vibration mesurement?

1 Answers  

---

Explain the functions of the CPU of a PLC.

1 Answers  

---

, Instrument Index, P&ID review, I/O schedule, datasheet, DCS / Analyzers specifications, loop diagrams, hook-up drawings.

1 Answers  

---

Make a ladder diagram on LSL valve will close, on PSL valve will open and start the motor

1 Answers   CCIE,

---

How to Calibrate Coriolis Flow transmitter in field

1 Answers  

---

Conversions

1 Answers   CCIE, Nestle,

---

Why Differential pressure transmitter is located below the tappings points for steam & condensible vapor flow measurement application?

2 Answers  

---

What is the out put of pressure switch & electronic pressure transmitter.

5 Answers   ADMA OPCO, Al-Barrak,

---

What is difference between sensors and transducers?

2 Answers  

---

I want to know if flowrate increases in 16' pipe line what will happen to upstream pressure and why?

1 Answers  

---

Describe how to calibrate various types of instruments and transmitters using ISA industrial consensus standard techniques.

4 Answers   Reliance,

---

Wht should be the ratio of natural frequency (Fn) to wake frequency (Fw) and wht if goes above the rato limit?

2 Answers  

---