Answer / alpglk

Typical Operating times for HV/EHV/UHV Circuit Breakers

Tripping/Opening: 25-40ms
Closing: 80-140ms

Answer / sreekanth bammidi

Generally the operating time of the circuit breakers
depends on the designer. The opening time of the breaker
should be less than the closing of the breaker. Opening
time should be less than or equal to 20msec (preferrable).
Closing time depends but preferrably less than 90msec.

Answer / arun

Circuit breaker closing tome 60 msec
triping time lessthan 40msec

Answer / vijay mali

Generally the operating time of the circuit breakers
depends on the designer. The opening time of the breaker
should be less than the closing of the breaker. Opening
time should be less than or equal to 20msec (preferrable).
Closing time depends but preferrably less than 90msec

Answer / rajesh kumar

circuit breaker closing time 40msec.
circuit breaker tripping time less than 20 msec.

Give details on how you intend to handle a challenging position you are posted to manage unexpectedly as a company staff?

0 Answers  

---

If age of Raju is 20% less than Sanju,then age of Sanju is how many % more than Raju

2 Answers   Tech Mahindra,

---

what is the working principle of ceiling fan and table fan?

10 Answers   ABC, Tata Steel Limited,

---

IN THE CASE OF AN ELCB, IF THERE IS ANY UNSTABILITY BETWEEN PHASE AND NEUTRAL IT MAY TRIP. BUT MY QUESTION IS WHEN A LOAD IS CONNECTED IN BETWEEN P AND N, THE LOAD CONSUMES SOME POWER AND THERE IS A DIFFERENCE IN NEUTRAL WITH RESPECT TO THE PHASE. THUS ACCORDING TO ME, THE ELCB WILL AUTOMATICALLY OPERATES WHEN EVER THE LOAD CONSUMES-- I KNOW IT IS WRONG. BUT THE SOLUTION IS?????????

1 Answers   KSEB,

---

What core magnetic balance test of transformer? How to do this test in a three phase Star delta (star-LV, Delta-HV) transformer? How to measure and where to measure? thanks and regards Austin

22 Answers   Neutech, Power Grid, TSSPDCL,

---

---

State the function of control rods used in nuclear reactor

1 Answers  

---

Q: How to calculate Transformer losses , tell us by Formula.

0 Answers  

---

when is safety goggles use mandatory?

3 Answers  

---

L&T ACB C-POWER OF 800A FAULS TRIPING AT THE TIME OF 110KW MOTOR STARTS WITH EARTH FAULT RELEASE

1 Answers   Ambuja,

---

whycircuit breaker is not connected at the generator end where the capacity of the generator is more say 60MW, 100MW etc.

2 Answers   Adani, Adani Power,

---

what is ment by doublefield revolving theory?

2 Answers  

---

What does OHB stand for in specifications for circuit breakers, especially found in SF6 circuit breaker?

1 Answers  

---