Answer / jithin

VCB is designed for HT it has vaccum chamber that prevents arcing and it triping speed is higher
ACB is desined for LT the terminals are almost open to atmospere it can cause flashing if we use it on HT

Answer / karna

HT Line Means 6.6KV,11KV and 33KV. LT Line means 415V. So
the ACB are Manufacutered for LT side because , based on
shortcircuit KA busbar terminal are designed in ACB . In HT
line while switching On & OFF ARC will be more it will not
withstand in ACB . IF we use VCB in LT side , the VCB will
not helpfull at fault condition, because its upstream
breaker will trip or component will damage

Answer / maurilio

if you use a VCB in low tension it odes not make problems
but if a ACB or Air Circuit Breakers in HT you will see a
lot of ligthning and probably fire in the breaker
So it is no convenient to use a ACB on HT

Answer / sushil kumar

Vcb is ht supply use rating of high voltage but acb lt supply used this manufacture 440 voltage difference for relay siting vcb and acb vcb is use closed area but acb use open area

Answer / hardik

As per Karna ACB is not usfull in HT because of its limited
capacity but in casw of VCB apply in LT it can dafinatly
helping out after making its ragular reliese setting and
tripping in foulty condition is depend on relay... so VCB
we can use but drow back is VCB in LT system it is more
expancive then ACB thats it...

Answer / kishore

actually acb is made for LT bcz EVERYTHING HAVE A LIMIT,SIMILARLY IF WE USE VCB AT LT THEN NO PRBL BUT IT IS A GREAT ECONOMIC LOSSES FOR US OK.

What will be the change in its efficiency and other parameters of a ONAN transformer if it changed to ONAF transformer ?

3 Answers   Tesla,

Sir, I need a power supply at 380V. The supply I get in three phase is rated 415V. The total supply I have from the supply company is 70KW. Kindly inform if it is better to use a voltage stabiliser for this purpose or a transformer

3 Answers  

Give me the calculation steps to design an electromagnet to be work in 230V 50 Hz AC Supply. Also give force that is created by that electromagnet when it gets energized.

0 Answers   GE,

i am BSEE student, my project study is to synchronize the generator of an hospital, it have a one 313KVA standby-power diesel gen.,and three 100kva transformer.The generator system is operated manually and no ATS or UPS. one more new building is being build so the transformer will be upgrade to a higher vale. 1)how i can connect the new gen. to the old gen. and to the synchronize panel? 2)what is the new gen. to be buy?(rating, etc.) These is my title: To synchronize the generator system of the ____ Hospital. Anyone have a good title? Thanks.

1 Answers  

i want bhel placement paper for electrical if anybody having pl send to my id kavitha867@myway.com immediately

0 Answers   Bhel,

how to apply b license to c license in tneb

0 Answers   Billroth Hospitals,

Did RMU have ct and pt ?

0 Answers  

what is differential relay in power transformer??

8 Answers  

Explain about Leakage Test.

0 Answers  

What is the difference between amorphous core transformer and CRGO core transformer?.

0 Answers   DAE,

Car battery + terminal allways biger than - terminal! Why?

2 Answers  

how is the cable tray designed & how its total length is calculated for an Industrial plant Say for Ex. (500KW Motor Load)

0 Answers