what is the dedicated earthing

1 Answers   Reddy Labs,

---

if a number of plc s are there then how many modbus to be used

0 Answers  

---

is power factor correction related with vector group of transformer i.e:Dyn11?

1 Answers  

---

What is the similarity and what is the difference between relays and PLC?

3 Answers   NTPC,

---

Air circuit breaker safety

0 Answers  

---

1. what is the power factor of a purely inductive load? (i) Zero (ii) Lagging (iii)Leading (iv) Unity 2. which type of transformer connection is preferred in case of power supply transformer? (i) Star/Star (ii) Delta/Delta (iii) Star/Delta (iv) Zig Zag/Star

2 Answers  

---

how it can be decided what will be the rating of CT and PT to be used in LT or HT cables?

3 Answers  

---

How to find Cable size? Caterpillar generator produce (Two generators) 127*2=254 amp at 11 kv . What would be the cable size (XLPE) to supply 256 amp at 11 kv? Air or surrounding Temperature is 32 degree C. Cable will go under ground at 2.5 feet depth. Group Rating Factors is 3 cables. Clearance between cables is 7 cm. Soil Temperature (Ambient) 28o C Soil Thermal Resistivity is 1.2 K.m/W I would like to use 3 separate single core instead of using 3 core cable. Some says I should use three separate single core 120RM cables. Some says 70RM .some says 95. I m totally confused. Is there ant specific rule to determine cable size? What would be the LT cable size to flow 500 Amp current? Ifte My e mail address is ifte13@yahoo.com Anyone please send me the answer to my e mail address, i will be very glad.

1 Answers  

---

Why dose voltage rated at 11kva

1 Answers   TK Chemical Complex,

---

plz tel me syllabus and exam date 4 jr executive engg (electrical)

0 Answers   AAI Airports Authority Of India,

---

What are the specifications for getting approval of Substation?

0 Answers  

---

how to select cable size according to ampere.

1 Answers  

---