Answer Posted / vanraj

For surge arrester (lighting arrester) class defines the
capacity of energy can dissipate by SA.

Class in generally not defined by B & C but it defined a
class 2 , Class 3 , Class 4 & class 5 for sub stations.

For 145 kv (110,132 kv ) class 2
For 400 kv ( 400 kv) class 3
For 540 kv (generally not use in india) class 4
For 765 kv Class 5

How do we arrive at selecting reactive capacitance value as 30% of h.p rating of motor?

1838

---

In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.

2113

---

How convergengr of nr method is not dependent on selection of slack bus and how gauss siedel method depends?

1801

---

What is meant by system?

1064

---

Is there a diode made that works with AC 120 volt 20 amp? If so can it completely stop all current flow in 1 direction at all times?

6710

---

what is the difference between active power and reactive power and apparant power in practical as well as theoritical

1926

---

What does bode plots shows?

1156

---

how do prepare ongc exam.how is it question model.i am electrical. which part covering in electrical.tell me

2261

---

We have given to 3phase supply to ups system & how can coming netural

2145

---

why we testing the core balance of the transformer before comissioning?

2165

---

how to decide the panel size like MDB ,SMDB PANEL SIZES

7361

---

clarify types of motor operated valves and advantages

1899

---

how to control dc motor?

1909

---

what is the usage of microcontroller in the panel board?

2081

---

what is the difference between an alternator and a synchronous motor

2019

---