Answer / ganesan.n

Distance relay i snothing but a Impedance Relay!!!

This relay Trips when the impedance level gets increased/
decreased above/below the Reach.

[Reach - Predetermined Impedance Level]

Answer / kmani190

actually distace relay oprate based on impadence . need
brif explaination please .....

Answer / eniyavan

Distance Relay is also Called as Impedance Relay.

If Any Fault is Occur in Transmission Line(like phase to
Earth Fault & Phase to Phase Fault)This Relay Acts to trip
the Circit Breaker.It's Opearting for line Impedance Value
(Line Impedance=Zxkm).

Answer / arun

distance relay used in transmission lines
T=k1 i2+k2 v2+k3 v *i*cos(thita -del)+k4
this is universal torque equetion use for defining distance relay
there r 3 types of distance relay mho relay used for long transmission lines for which k1 =0
reactance relay used for short transmission line for which k2=0
impedance relay used for medium transmission lines for which k3 =0
when evar impedance seen by the relay is less than reach then these relays operates means Zseen is less than Zset

how to select the double earth conductor if 21A full load?

0 Answers   L&T,

---

How can we estimate Gen rotor current?

3 Answers  

---

how much current capacity 250 amp. mccb please tell me about whats are the reasons to trip 2 or 3 times in a night. and what are the steps to short out this problem

1 Answers   Havells,

---

in three pin plug point, whats the reason that one plug point is bigger in size

4 Answers  

---

we have total 1000hp motors we paid 7 laks rupees how to reduce power bill

4 Answers  

---

---

which calss ct's,pt', use protection,meatering and others

1 Answers  

---

how to calculate the earth mat design in 132 kv substation yard ????

0 Answers   Divis Laboratories, KSEB, SWPL,

---

state the working of discharge lamp?

0 Answers  

---

If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

---

How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f used in Canada is to be operated on 50 hz in Europe frequency then how will its KVA rating change? a-increase b-decrease c-remains same

1 Answers  

---

What is the "IS" for Rising Main?

1 Answers   APTransco, NTPC,

---

How much current in 100 kva Transformer HT & LT side

1 Answers  

---