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Answer Posted / kannara
You can use magnet for test smoke detectors.hold a magnet near to the detector,the detector will activate with in seconds and give fire signal to main panel
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Can a generator runs after getting 1st stator earth fault.
I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.
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.
Why dry type cast resin transformers tap link blast in HV side while power shut down times on load?
why we use sinosidal voltage / current instead of others in system?
hi this is hema can anyone mail me previous years questions for the APPSC-A.E.E (in electrical stream.) ......thank u.
What is the angle of inclination for the oil connection from transformer conservator to Bucholz relay and why?
An ISP is granted a block of addresses starting with 150.80.0.0/16. The ISP wants to distribute these blocks to 2600 customers as follows. a) 200 medium size businesses; each needs 16 addresses b) 400 small businesses; each needs 8 addresses c) 2000 households; each needs 4 addresses Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.
how do u gauge the size of the cable ?for eg. consider a 300 sqmm L.T Cable.How do u determine the size of the cable seeing it pratically?
What is the reason behind current flow(20 A) in amain earth cable of an SMDB? Is cuurent flow(45A etc) through a neutral cable acceptable?
Why we use duplex coil and hook switch in telephone system?
how to estimate wiring ins roughing ins. and boxes
Why an ac systems are preferred over dc systems?
what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW
what is mean by transition resistance of transformer?
