why threre are two parallel lines in transformer's symbol?

11 Answers   NTPC,

---

which %age if losses increases when frequency is increased to 25%

4 Answers   Maihar Cement, Siemens,

---

1.what is difference between ATS & STS main use. 2.what is difference between ACB& VCB With symobles,and main partes, manimum range. 3.How many types of relays and main function.

0 Answers   Visa,

---

if we convert Ampers into kva,which one formula use by us,pls tell me?

10 Answers   ABB,

---

I HAVE CONSUMER WHOSE POWER FACTOR IS 65% I WANT TO INCREASE IT TO 98%.HOW TO CARRY OUT?

7 Answers  

---

how  do you choose the cable size as per amps rating & the voltage drop for the same.

0 Answers   C&W,

---

whether fibre optic cable in high voltage earth conductor is used for protection circuits

0 Answers  

---

What are the Full Forms of TVM, MTL, CVT ?

0 Answers  

---

Why does The speed of motor used in elevator remain constant irrespective of load??

1 Answers  

---

why do we use LPF wattmeter not UPF in the experiment of no load and blocked rotor test of 3phase slipring induction motor?

3 Answers   Matrix,

---

Difference Between B Curve & C Curve in MCB.

3 Answers  

---

Difference between copper earthing & aluminium earthing?

2 Answers  

---