Answer / aamirali

Neutral voltage is zero, when the fault occours it becomes
equal to phase voltage.

Answer / guru

The Voltage Unbalance in the 3 phases create a floating
voltage which reflects in the neutral.( Sometime it will be
equal to phase voltage itself). That is why neutral in the
secondary side of the transformer is always grounded and it
is not connected to the main earthing grid. By Making a
seperate earthing for neutral avoids the unnecessary earth
fault tripping in the circuit

Answer / raj kushwaha

If star connection than Neutral voltage is zero in normal
circuit. But if unbalance load than Neutral currant can not
be zero.

in conclusion why we select you?

1 Answers  

---

what is GRR(Grid Rotot resistance)?Why it is used beside of LRS?

9 Answers   ACC, L&T, Sri Biotech,

---

what is the difference between contactors & relay.

2 Answers  

---

What is “pu” in ee?

0 Answers  

---

How to test the thyresitor or SCR by multmeter?

5 Answers   ABB,

---

---

how the testing of CT OF 400/200/100 done in33/11 kv s/s

1 Answers   Reliance,

---

if an induction motor is operated at unity power factor what will happen? will motor run or not? kindly describe a logical answer?

2 Answers  

---

what is meant by motor startup supervision & motor load jam protection ?

0 Answers   ABB,

---

What is meant by power factor correction?

5 Answers   Aspire,

---

An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?

0 Answers   HAL,

---

1. which type of transformer connection is preferred in case of power supply transformers? (A) Star/Star (B) Delta/Delta (C) Star/Delta (D) Zig Zag/Star 2. In a power transformer usuall which winding is closer to the core? (A) Primary winding (B) Secondary winding (C) Low Voltage winding (D) High Voltage winding 3. The power factor of a purely inductive load is (A) Zero (B) Lagging (C) Leading (D) Unity.

9 Answers   CECRI_Central_Electrical_Research_Institute,

---

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above

0 Answers  

---