i have 3x200KVA and 2 x 80KVA UPS with battery bank of
150AH 68Nos. and 100AH 204Nos., i need to install AC either
ductable or PAC type, so can you help me to calculate heat
load and capacity of the AC to install.
i have dry type transformers can you help me that how many
tests i can do to know the performence of transformer and
also please tell me about the BDV test and Insulation
resistance test in oil cooled transformers
why can we use cosine wave instead of sine in ac supply as
both have same rms vale and ripple factor
if we look on phasor of the transformer vaoltage is 180
oppsite at primary and the secondary so to improve a power
factor is secondary should kept negative to improve it
means is -.90 became +.90 at other side
why does a dc machine has high efficiency while working as a generator than as a motor ..
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula.
formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec.
Sp = RT( I x I x t) / K
Where Sp – is the cross sectional area of bus bar in millimeters.
I - is the value of AC fault current.
t - is the operating time of disconnecting device in seconds.
K – is the factor depending on the material of the conductor, insulation and initial and final temperature.
Value of ‘k’ for copper is 143.
what is the breaking capacity and making capacity of circuit
breaker and how
If ct ratio is 250/1 and mtr is of 5 amp, what will be mf?
i am 3 years diploma course pass out candidate.what type of
certificate can i got in marine service.
Why using synchronising methed in DG's sets?
how does commutator convert a.c to d.c?
difine electrical ballast in HPSVL
In constant power region of 3-phase IM torque-speed
characteristics, if frequency increases slip
A does not alter B decreases
C increases D none of above
what happen when increase or decrease size of
My question is abt backlog.I had dropped one subject in my
second year, and completed this subject in the 3rd attempt,
so how many backlogs i have got?1 or 3?plz sujjest the
answer as soon as possible
How to calculate flow of water delivered by pump when
pressure & size of pipe line is given