Answer / vinoth_sundar

VCB is vaccum circuit breaker which is used in HT lines.
MCCB is mould case circuit breaker which is used in LT lines
upto 1000V

Answer / guest

vcb is placed on hts lines and mccb is placed on lts lines

Answer / rajan.s

vcb in HT BANEL 33KV mccb lt RANGE 25A TO 1600A

Answer / vinayak

I think the vcb's are used for HT
lines(above 33kv) and mcb's &
mccb's are used on LT lines upto
33kv.

Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?

3 Answers   Meralco,

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hello!my name is sheikh iam preparing for indian engineering servieces,please send me the old question papers..to sheikhshaazforjobs@gmail.com

0 Answers   APCPDCL, apspdcl,

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I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

0 Answers   Siemens,

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What is the difference between class0.1 and class 0.1s accuracy of current transformers

2 Answers  

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WHY MOSTLY Rph IS USED FOR CONTROL CIRCUITS AUX. SUPPLY ?

0 Answers   UltraTech,

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HAI SENT HPCL APTITUDE QUESTION PAPER, MY EMAIL ID IS angus_eee04@rediffmail.com,angus_eee04@yahoo.com

0 Answers  

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Diagram on interconnectivity of 11kv transformer with RMU (i.e, one incoming and two outgoing or two incoming and one outgoing)

0 Answers  

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what is surge impedance loading and it's significant in power system?

2 Answers  

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High speed earth switch operation with diagram

0 Answers   KSEB, L&T, Sanden Vikas, Siemens,

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what is impedence of transformer? its formula

1 Answers  

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How is the AVR working?

1 Answers  

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why transformer is conneted to dc for polarity test.it doesnt work in dc?

1 Answers   ABB, KVPY,

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