(A) directly

(B) through a resistor

(D) Any of the above

Answer: (D) Any of the above

Explanation:

Without Earthing

With Earthing

Another name of neutral earthing is system earthing. In the neutral earthing system, the neutral of the system is connected to the ground

The advantages of neutral earthing are:

It can make a closed path

Elimination of arcing ground

The neutral of the power system may be connected to earth directly or through a resistor or reactor.

Solid grounding: In this type of neutral grounding, the neutral of the system is directly connected to the ground through a conductor of negligible resistance and reactance.

Resistance grounding: In this type of neutral grounding, the neutral of the system is connected to the ground through one or more resistance. Resistance grounding limits the fault currents. It protects the system from transient overvoltages

Reactance grounding: In this method, a reactance is inserted between the neutral and ground to limit the fault current. This method has high transient voltages appear under fault conditions

More MCQS

1. Under over excitation synchronous phase modifier works as

2. The neutral of the power system may be connected to earth

3. The time to open the circuit breaker contact is called as

4. A 100 Ah capacity battery should deliver a current of 10 A for approximately _____ hrs.

5. For 400KV line, The Spacing Between phase conductor is around

6. Shunt capacitors in a sub-station

7. An alternator is said to be over excited when it is operating at

8. In case of transformer Buchholz relay is used to protect from

9. Series capacitors are used to

10. Disadvantage of low power factor is

11. The colour of neutral three core flexible cable is