hi this toufik here. i am doing my b.e.degree.now i am in
final year and supposed to do a project in this year so i
thinking to control the buchholz relay using software base
means checking the status of transformer oil using
microcontroler, plc or scada. so can i do so...??? alz
can we make a electric generator,which can not use any type
of fuel,air,solar,gas,thermal,coal,petrol,etc and able to
produce electrical energy (or self electricity generating
Define early construction of human being
Briefly define and explain the following different types of Pulse Amplitude Modulation (PAM) with some examples.
v) Quadrature Amplitude Modulation (QAM)
what is upper impedance and lower impedance of a distance relay
How can we calculate the KVA rating of a Distribution
transformer from its core details?
why chock were used in old tubelights but are not newest tubelights?
What will happen to the protection and metering, if the
polarity of a single or two PT/PTs in three phase system is
reversed? Please provide reference if any.
what are the range of memory address in plc for L&T lx7 4A
what is apparent poewr, reactive power, & active power?
We have drive feeding an output contactor for a 5000 hp
motor @ 5kV application.
The motor FLA is 629amps x 1.25% service factor = 786.25
The cable that we current have in place between the drive
and the output contactor is 350kcmil- MV-105 (parallel
cables). Per the NEC table 310.60 (C) (69). This show the
cable ampacity is at 615 amps per cable for a rating of
We have derated the cable for the cable tray and the
multiple cables application and our calculations show that
after the correction factor factor we are at 922amps.
1230 amps x .75% correction factor factor = 922.5 amps.
The customer is driving us to then use another safety
factor of .25% off of the already derated cable. Can you
please provide a longhand calculation for your solution on
what is the use of switch disconnector fuse
how snubber circuit works to protect switching devices?
with 3 phase board on a 63 amp rcd is it ok to have 6
electrical showers 2 on each phase and what problems could
armature winding of dc machine produce alternating emf then it
convert in to dc by using commutator.But only we consider
armature resistance why don't we consider inductive reactane
what is per unit calculation?looking for simple and strong
explanation thk u