we hav seen in electric engine of trains only 1 wired slidng conecctn is there frm ovrhead line,howevr to complete a ckt in dc postv n negtv two conection has to b there...so where is tht negative is been connectd or where it is grounded...?

5 Answers   ABB,

---

What is the numerical quantity of sqcm?

0 Answers  

---

why transformer is rated in KVA ?

5 Answers  

---

CAN ANYBODY PL TELL ME WAT FACTORS CAN CAUSE UNDERVOLTAGE ON A BUS??? PL LIST ALL THE REASONS WITH SOME EXPLAINATION

3 Answers  

---

Compare OH Transmission & UG Transmission?

2 Answers  

---

---

why generation is done in delta nad transmission in star? brief

3 Answers  

---

how to calculate the ct burden?

1 Answers  

---

A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3

0 Answers  

---

what is the difference between earthed system and unearthed system.. where do we use unearthed system because in electrical catalogues always cable for earthed and unearthed system is given..pls elaborate

3 Answers  

---

Why HT cable have only 3 core ?

10 Answers   Jindal, McDermott,

---

why can't we increase the voltage by increasing the field voltage in order to get higher voltage.so that we can eliminate step up transformer

4 Answers   Bhel,

---

What the main causes of transient interruptions on Over-Head Distribution Lines?

0 Answers   Orion Laboratories,

---