Answer / thrimurthy

over current meance nothing but a current reaches above the
rated CT Ratio. and over load and fault occur in between 2
lines line to line short circuit it is over currein fault.

Earth fault means fault occur between line to ground is
called Earth fault. used in power system

Answer / k.prakashchandra

It is 2 OCR + EFR scheme for line protection.Usually OCR is
provided for R & B phases and EFR is connected between the
star point of CTs and star point formed by OCRs (R & B
phases) and direct lead from the third CT (Y phase). R &B
phase ct currents through the OCRs, and Y phase ct current
directly form the second star point.

what does the word synchronous mean in 'synchronous machine'

3 Answers  

---

WHAT IS THE MEANING OF 'UPF'&'LPF'.... HOW CAN WE DEFINE IT? WHAT IS THE VALUE/RANGE OF EARTH WIRE RESISTANCE USED PARTICULARLY IN HOME....

2 Answers  

---

What is the basis for framing the rules of block diagram reduction technique?

0 Answers  

---

how we calculate capacitor bank mvar for 11 kv distribution networ , and i need releation between capacitor bank with voltage, frequency, current, pf

2 Answers  

---

best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?

0 Answers  

---

Pure inductive ckt takes power from AC when 1. Applied voltage and Current increases 2. applied voltage and current decreses 3. voltage decreases and current decreases please justify

2 Answers  

---

what is the diffrence between current transformer and voltage trasformer

3 Answers  

---

what is the full form of ka (100A mccb KA)

1 Answers  

---

what is the min and max dc voltage for a dc system (110vdc)

1 Answers   ASD Lab,

---

1.differance between onload ups and off line ups.

1 Answers   CTS,

---

why a bulb glow when connected with two end phase and neutral respectively.

1 Answers   ACME,

---

What will be the excat cable specification in Sq MM...please find the details below.... Induction Motor HP:55 Amps:70(starting Amps),45(Running Amps). Volts:415

1 Answers  

---