Answer / jawwad siddique

A surge capacitor is used to mitigate (minimize) voltage
surges. Capacitor impedance can be modeled as 1/jwC, j = i =
imaginary value used in vectors, w is the frequency, and C
is the capacitance. A fairly small capacitor on the input to
a power supplying circuit will have a large impedance, and
so will impact the circuit operation very little due to the
low power frequency. Surges are high frequency. When a surge
occurs, the capacitor impedance appears much smaller to the
high frequency surge, effectively shunting the surge energy
to ground; this minimizes the surge with respect to the
protected circuitry.

The transmission does not have options: a)Partition noise b) Flicker noise c) resistance d) Short noise and reason

0 Answers  

---

anyone please send transformer parameter design formulas & details of tap changer ? plz i have interview this week its more helpful for me ?

0 Answers  

---

For a 50MVA (138/69/13.8 KV) transformer, what would be the maximum demand in order not to exceed 80% of its operating capacity.

2 Answers  

---

What are the disadvantages if neutral current exists in grounded star transformer distribution system?

1 Answers  

---

Phase control and integral control are used for?

0 Answers   NPCIL,

---

Why we find the sensitivity for the CT's to check?

0 Answers  

---

why we use low kv lightining arrester in line for example 9 kv using in 11kv

1 Answers  

---

Difference between auxliary relay & pla relay

1 Answers   Reddy Labs,

---

As load in a transformer increases, mutual flux linkage in core= A increases B decreases C not change D first increase then decrease

2 Answers  

---

Why tripping not occur when the transmission lines (11KV & above) breaks? Doesn't we provide earthfault protection for it?

1 Answers  

---

what will hapen if we give ac supply to dc motor?

2 Answers  

---

what is the function of CRGO in a Transformer?

6 Answers  

---