Answer / yusuf.mavin

When a large current flows through the primary of a current
transformer it is stepped down and a low current flows
throughs the secondary of the c.t. however when there are
faulty currents flowing the secondary cannot bear hevy
currents so the core of the c.t gets saturated i.e. it does
not respond any further to higher currents. All the
electrons of the core are alligned and there are no more
electrons to works further this phenomenon is called
saturation. This can be avoided by applying multiple cores
to the c.t. which act as protective cores and prevent the
main secondary from burning.

What is the working principle of ceiling fan?

6 Answers   Indian Navy,

---

what is Fault level? why it is calculated? how will u decide same for our plant?

0 Answers  

---

300m long and 30kw inductive loade 3phase supply how many size cable required

0 Answers  

---

why we use two slope(differential & restraining) in differential relay.but in busbar protection differential we are using only one slope?please explain

0 Answers   ISRO,

---

CONSIDER A 415V/200V STEP DOWN TRANSFORMER.CAN WE USE USE IT AS STEP UP TRANSFORMER BY GIVING 200V IN SECONDARY AND TAKING OUTPUT FROM PRIMARY?

22 Answers   L&T,

---

---

why told ' x ' mer to transformer

1 Answers   Electrotherm,

---

Dear sirs, pls check this 4-20ma to RS485 module datasheet,pls guve me some suggestions. http://www.szsunyuan.com/sy/pro_more.asp?Productid=539 Thanks. E-mail:yunianjiang99@gmail.com

0 Answers  

---

what is the maximum demand how it is defined

1 Answers  

---

what is green house effect?

4 Answers  

---

WHAT DO U MEAN BY THERMAL OVER LOAD RELAY& WHERE THEY ARE BUSED

4 Answers   L&T,

---

Why we use stones in switchyard?

3 Answers   Havells, L&T,

---

For these 2 devices what their power ratings are ? 1) single phase : AC 220V & starting amps 3Amps (i.e. starting torque) and the stabilized amps 2A ... For deep freezer 2) single phase : AC 220V & starting amps 2.7Amps (i.e. including the starting torque of a CRT monitor) and the stabilized amps 1 Amps thanks

1 Answers  

---