Interested to Buy Any Domain ? << Click Here >> for more details...
Any one can explain if there is any harm from humming noise
heard from air circuit breaker : we have 415 switch board
having two incomers from transformers 3.3KV/415V , when bus
coupler closed, and open one ACB incomer to work in one of
the transformers, the current started hunting around 50
Amps, and heard humming noise from the air circuit breaker,
although the load current was only 1200 amps while the ACB
capacity is 2500 Amps, and the transformer 1600 KVA. The
same didn't happen when taken the other transformer offline.
Why this humming noise and current fluctuation? is there
any implication or danger, bearing in mind that we just
returned everything back to normal and stopped the
maintenance of the transformer. Shall we go ahead and
ignore this noise?
- 6 Answers
- 12623 Views
- I also Faced
- E-Mail Answers
Answer Posted / hussain
Thanks Vijendra Joglekar
The breaker has been serviced already and nothing wrong
found, the load is 1200 Amps, but the current fluctuation
is around 50 Amps (+&- 25Amps)when load increased, the
sound started at load above 800 Amps, while the breaker is
rated up to 2500 Amps.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).
what are the industrail measures to over ferranti effect? how would the ferranti effect the power system if those remedial mearsure arent taken? how often does this effect occurs in real power system?
what is the saturation point of crgo lamination.
What is the control action?
Explain about Dubai electrical sysaem? Explain about Dubai drinking water system? Explain about Dubai Burj tallest building Electrical,Water.etc.. maintenance system?
Dear all i am kumaravel. now in chennai. my work is control and relay panel auto cad designing.up to 11kv to 400kv then question is i am improving my knowledge. i want some books name and auther are available for this C&R panel related. plese any one help me
why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?
Given a collection of points P in the plane, a 1-set is a point in P that can be separated from the rest by a line; i.e. the point lies on one side of the line while the others lie on the other side. The number of 1-sets of P is denoted by n1(P). The maximum value of n1(P) over all configurations P of 19 points in the plane is 18
what is the string efficiency
Why 1/3 is used in symmetrical components?
Which test will be more severe for VCB?
WHY THE DIMENSION OF TWO SAME RATED MACHINE IS DIFFERENT ?
How to configure the drives in PLC, through Profibus commnication. And to how to address it?
How does zener phenomenon differ from avalanche breakdown?
why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?
