what is the clear formula to calculate cable size for a load

0 Answers   TCS,

---

Circuit diagram of tube light without starter using electrical choke

0 Answers  

---

transformer test

4 Answers  

---

when i am going to take trail on a 3ph sq.i/m motor 5.5kw, i observed that RPM of the motor is very low as compared to the rated RPM and also it rotates in clockwise in first ON command,and anticlock wise in second ON command. finally i observed that on phase is no available . but iam not clear about, why the motor is rotates in both directions without any phase interchanging.pls answer to my question.

1 Answers  

---

if 40 watt bulb has higher resistance then a 100watt bulb then according to joul farmula p=I^2R the 40 watt bulb more power consume then 100 watt bulb.

5 Answers  

---

---

why we use negative feedback in control system.

2 Answers  

---

What are the major types of Curent Transformers?

2 Answers  

---

when a machine act as genartor and as motor?

2 Answers  

---

what mean by power factor

2 Answers  

---

If there is no problem with the electronic circuit and regulator then why the motor start rotating at low value of regulator with full speed both at laod and no load??? and if my judgement of circuit is wrong then what is your openion?

1 Answers  

---

resistance of transformer oil=?

1 Answers   HCL,

---

For refrigerators the motor current is raised beyond its rating on both conditions when the voltage of the system is more(say 270v) than the rated voltage(220v) as well as when the voltage of system is less(say 160v) than normal voltageof 220v, why explain?

0 Answers   Electrical Tech, UPSE,

---