Answer / abhilash

OCB is oil circuit Breaker in which oil is used as circuit breaker and VCB is vacuum circuit breaker in which vacuum or air gap is used for circuit breaker

Answer / aap

OCB is Oil Circuit Breaker which is not used now-a-days and VCB is Vacuum Circuit Breaker which is used widely these days.

Answer / pradip jagtap

ocb means oil circuit breker( oil used as extinguisher)
vcb means vaccume circuit breker(vaccme used as extinguisher)
ocb low capacity purpose
vcb high capacity purpose

whats the existence of reactive power and when it arises?

0 Answers   IIT,

---

Why short ckt does not happen when solenoid coil connected to supply. as its a wire only.

1 Answers   Siemens,

---

What are the fire Estingushers use in electrical fire?

3 Answers  

---

What are the characteristics of negative feedback?

0 Answers  

---

Enlists the applications of sampled data systems?

0 Answers  

---

---

Difference between transmission line and cable?when ever a large water channel has to crossed it is easier to use cable then transmission line why?

1 Answers  

---

what is the maintain in ACB,VCB,MCB,MCCB breakers?

4 Answers   CTS,

---

In case of 3Phase Supply, Voltage R-Earth/Neutral - 220 Y-Earth/Neutral - 220 Z-Earth/Neutral - 220 Total is -> 660Volts Then Why it is said that 3Phase supply is 440

6 Answers   Hindustan Unilever Limited,

---

we have consol make 3 phase servo stabilizer for cnc m/c. while installing the earth neutral voltage is 1.7 volts at stbilizer off condition and when stabilizer get on en voltage reaches 4.8 volts (new earthing is done and neutral is helthy condition all phase to neutral volts 440,442,441 v)why this happen.solution for cause.

3 Answers  

---

why we use 630mm single core cable for transformer secondary side and why two neutral cable

0 Answers   Technicare,

---

What is harmonics and how the 1st,2nd,3rd etc harmonic levels

2 Answers  

---

what are all the components required to assemble solar panel other than pv cell?

0 Answers  

---