Answer / kumar.latif

To avoid excessive heating caused by high order harmonics
such as 3rd and 5th harmonics which cause increase in
hysterisis and eddy current losses in core. These harmoncis
are the result of magnetising current which is non
sinusoidal.

Answer / geno peter

well, it causes disturbances to the communication systems
nearby ie., electro magnetic waves . its causes unwanted
heating in the core

What is time response of the control system?

0 Answers  

---

In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

0 Answers   PPIL,

---

If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

1 Answers   Focus,

---

open circuit test when performed on double the voltage & double the freq, then what will happen with p.f and current magnitude?

1 Answers   Aarti Drugs,

---

a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5

0 Answers  

---

---

i need circuit star delta connection?

1 Answers   L&T,

---

Witch do depand of Power factor and theory of power factor?

0 Answers  

---

all interview questions with answers of ntpc (2000-2009

0 Answers   Hetero, NTPC,

---

what are fluorescent lamps (fluorescent fixtures) & what are incandescen lamps (incandescents fixtures) ? differences between these two ?

1 Answers  

---

What is control system?

0 Answers  

---

area control error

0 Answers  

---

Main Differance between Primary Distribution & Secondary Distribution Of Electricity....?

1 Answers  

---