Answer Posted / naga muneendra reddy

UPS means Uninterrupted power supply.
it has a rectifier circuit, a battery bank and an inverter
circuit. battery bank is connected in parallel to the
circuit joining rectifier and inverter. normally battery
will be charging, when power fails, dc power from battery is
inverted to AC and supplied to the load.

Explain the iniluencc of short circuit ratio on the pert'orniancc of synchronous machine.

1705

---

what does a string of resistors in a series will do?

741

---

design of IGBT firing circuit for 11KV

2096

---

Working of microwave oven?

1791

---

Why have to use copper cable for local isolator to motor ?

1654

---

---

If the line voltage is reduced to 75% of its rated value then by what percentage current will reduce ?? 75% 25% 50% no change and why ?

1740

---

what is size of 3phase 4wire cable to be used for 11 ton ductable A.C and how to calculate cable size for different load

3589

---

Why is water motor not taking the pressure? what is the problem?

1109

---

What is inverse definite minimum time lag relay? Where is it use?

2292

---

we have a 2.5hp Starite electric motor water pump,the elec motor burned out,we need to replace starting capacitor(old capacitor specs erased),what microfarad rating capacitor do we need? 110-125V

1350

---

what happend to DC shunt motor if its field winding insulation becomes slightly weak? will that motor can run on full load or not explain in detail. thanks

1157

---

What is the function of NGR for the parallel operation of alternator? whats happen when different rating of alternator are running with parallel?

2485

---

is there any device that works properly accept relay, it may be fuse but if i want fuse of 33kv 300 amp it is avaliable, pls give me details

1565

---

I need bhel previous year quetion papers for electrical engineering department.I searched but i could not find out

1639

---

What is real time power factor control panel(RTPFC)?

3820

---