Answer Posted / rawat

In AC VVVF drive we control the motor by changing its
frequency through drive. But in case of Dc drive there is
armature voltage and field voltage which are controlled by
scr's.
So there is no frequeny in case of dc drive as here dc is
not changing into ac.

If more than rated DC voltage appears across trip coil of the breaker, what will happen? e.g. in 110V DC circuit system, if voltage across battery terminal showing 121 V

1659

---

what is sustainable current of any conductors . a bare busbar or pvc cable has different sustainable current .

1785

---

what is the criteria for selection of conductor used for ehv ac electrical dischrge

2100

---

plz send me Bhel, Mahagenco, sbi previous exam paper for electrical engineer on my email-id kambali_smita@yahoo.co.in

2409

---

What is the general power factor & min. power rating of TV,LCD type TV, CRt type TV, Scanner, printer?

2070

---

What is the one main difference between ups & inverter ? And electrical engineering & electronics engineering ?

1141

---

. What is Electrical Life & Mechanical Life of Circuit Breaker? 2. What is Electrial Life & Mechanical Life of Magnetic Contactor? 3. What is RCD, RCCB & RCBO? 4. What is the Between defferance of RCD, RCCB & RCBO?

3349

---

what are the principles of a booster converter?

2067

---

What is the formula for selecting the cabels according to load? How to calculate what sq.mm cabel to be used?

1492

---

which book to refer in electrical engineering for iocl exam & which book for general english.

2245

---

How many gap between finger contact in a.c.b. and v.cb.?

1287

---

why did youi choose this career?

2220

---

can we do the star delta connection of capacitor for 3- phase motor starter.

2033

---

Define noise?

1171

---

What is a advantage of Self Reset Lockout ? On Fault breaker get trip & fault no longer exist then self reset lockout how inform us?

1875

---