HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.

0 Answers  

---

Is it possible to import & export power through the same power transformer? what will be the vector group normally for both different or same?

1 Answers  

---

What is the drawback of static coefficients?

0 Answers  

---

inductance and capacitance may result in periodic reversals of the direction of energy flow,how???

1 Answers  

---

if 15 kv is grounding directly what will happen?

5 Answers  

---

---

What is Creepage distance?

1 Answers  

---

Ammeter of 1 ohm resistance measure max 10 ohm to measure higher resistance from it

6 Answers   BARC,

---

why we store only dc in batteries ?

1 Answers  

---

List out the types and name of the motor under their application?

0 Answers  

---

which frequency is to be selected for measuring earth resistivity

1 Answers   MSETCL Maharashtra State Electricity Transmission Co Ltd,

---

what are the main problems that happen in an emergency light and how to fix them ?

2 Answers  

---

How many types of Transformers are there?

8 Answers  

---