Answer Posted / nageeb khalafalla mohammed

The AVR is (automatic voltage regulator)is an electronic circuit used to keep the generator voltage constant to the pre stetted value whatever the changes of the loads as the voltages tends to decrease with the increasing of the load so the AVR increases the exciting current and the opposite is done for increasing in the voltage . This is done by virtue of the thyristor in the AVR , the reference voltage circuit, the comparator circuit in the AVR .with the feedback circuit. the AVR senses the output voltage and increase or decrease the excitation accordingly to keep the voltage constant.

What is CCT (Correlated Color Temperature) ?

2008

---

Please explain me abt PQ diagaram in the power sector.

2472

---

What is kirchoff ’s current law (kcl)?

1138

---

why ss stablity limit is more transient stablity limit?

2235

---

how many electricity poles are there and what are the names and their sizes.

1969

---

PIU how does work?

2479

---

What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?

1990

---

what are the installation procedure of high voltage power transformer,CT,CB&PT?

2128

---

how to calculate compresor capacity?

2250

---

what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker

5482

---

What will be electrical cost per sqft for IT building (basebuild and fitout)and for residential township?

1989

---

Single line diagrams for star to delta and DOL starters.

2310

---

When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

1960

---

In 11/0.414 KV Parralel supply network with Bus tie closed what will be the fault level is it doubled or halved??

2122

---

How to use earthing on shipments.

1494

---