Answer / sms

AS PER IS:6792 , Oil Electric break down voltage( BDV) at
room temp using 2.5 mm gap should be Min 30 KV .
Accordingly don't take risk and carry out oil filteration
as early as possible to avoid any break down.

Answer / k.prakashchandra

40 KV is the minimum value required. You need not panic.
Measure the BDV again after 15 days. If there is drop ,oil
filtering is to be done at the earliest

Derive the inductance of a coil in terms of its physical factors.

1 Answers  

---

arrange to send solved question and answer its easy to study and understand the thing, because of Exam is to be conducted shortly

1 Answers  

---

1.Why sinle phase motor is not self starting 2.working principle of alternator 4.list out electrical formula

2 Answers  

---

In a Tap changing transformer where is the tap connected , is it connected in the primary side or it is connected in secondary side

8 Answers   Indiabulls,

---

what is power frequency withstand and impulse withstand of a circuit breaker?

2 Answers   Power Grid,

---

is that any software calculator to calculate the size of cable

0 Answers   JSW,

---

explanation of mesh bus bars

0 Answers   Eskom,

---

What is zero of the system?

0 Answers  

---

If you have an earth with pilecap then your resistance is really low. why and how?

0 Answers  

---

Define protection core in CTs Ex. 5P10, 5P20 etc.

1 Answers   HPL,

---

now a shunt motor is practically a constant speed motor , then how does it meet the increase or decrease in the load ?

1 Answers  

---

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,

---