Answer Posted / karthik

Relays are not used in Long transmission lines .. Only
circuit Breakers are used

Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?

1430

---

what is the reason for indication of light in the earth lamps of main switchboard.if there is an earth why does one lamp get dim and the other two bright.

2290

---

Define sensitivity?

1051

---

Difference of induction motor & servo motor ??

1785

---

How is efficiency of DG set calculated? At many places I found the efficiency to be mentioned in percentage. But at some other places I found kWH/ litres. I want to know how dimensionless percentage value is arrived at?

1870

---

what are the specifications we must look at to select a relay for any capacity motor?

1992

---

armature winding of dc machine produce alternating emf then it convert in to dc by using commutator.But only we consider armature resistance why don't we consider inductive reactane effect?

2019

---

difrent between vcb acb sf6 and mccb breakers

5341

---

How to calculate wire length,size & current? ( related to control panel)

2129

---

How can we calculate the motor frame sizes?

3364

---

How to check the LM324 Ic

8416

---

How we calculate the Multiplying Factor of Kwh meter for 3 phase alternator.

1834

---

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.

1699

---

How can i calculate the Breaking capacity of molded case circuit breaker, is the breaking capacity of CB for Diesel generator shall be less than grid supply's breaker ?

2175

---

how ups works ? various parts of ups and working principle

1904

---