Answer / sanjay

Arcing isdue to inductance only.

Answer / kaushik

arcing is due to both the passive element
when ever there is element which stored energy as electrical
voltage and we roughly try to connect the two terminal of
charged passive element like short circuit the terminal we
will have arc. as with neglible resistance the current is
very large and with lack of proper connection between two
terminal current tries escape through air from one terminal
to another causing arcing.

what is the working difference b/w softstarter and Variable frequency drive ?

6 Answers   Parle,

---

I have 2 Nos of 2500kVA 33/0.415V cast resin transformers. How to decide on ampere rating of HT Panel? Also advise me how many panel RMG i have to consider whether 4 panel ok?

1 Answers  

---

Why carbon brushes are used in motors?

6 Answers   BARC,

---

The Source internal resitanse Rs , When equal to Load resistance RL, the maximum transfered is of _____ % of input power?

2 Answers  

---

What kind of preventive maintenance are there for AC induction motor?

1 Answers   Gulf,

---

Difference between Earthing Truck & Earthing trolly for HT panel

0 Answers   Moolchand Medcity,

---

give single line diagram of D.O.L and star -Delta starter ?

8 Answers   ABS, Al-Shuaah, Alkali Metals, Cabin Crew, Cognizant, CRI, Gwalior Distilleries, Hotels, Logicon Engineers, Max India, Nicomet, Radisson Blu, RK Company, Siemens, SLCM, Solar, Steel Strips Wheels, Sugar Factory, TATA, TCS,

---

what are the advantage of UG cables over the over head lines

2 Answers   DVC,

---

Draw a block diagramof Three UPS systems connected in Parallel mode?

0 Answers   HSL,

---

if there is a voltage difference between neutral and earth when we operate any instrument for fraction of time then where is problem?

1 Answers  

---

what is power system transient condition

1 Answers  

---

What are the different modes of plc processor?

1 Answers  

---