The temperature rise is not considered in OC & SC tests of Transformers..
But in Sumpner's test, temp. rise is considered..
Hence is called "Heat-run test"..
Also, the transformers draw only the power req. to supply core & Cu. losses of transformer..
Procedure for sumpners test is the single phase transformer. This is a back to back test.
On installed transformer a test is performed to check weather it has any oil leakage or not, the test is called pressure test, more precisely pressure leakage test.
this test helps in finding the core losses and copper losses in single test , it is also called as back to back test or heat run test .
A high pot test is a test of a wiring system for high potential (voltages). It's also called a megger test. This test verifies the integrity of a wire's insulation, and ensures that high voltages cannot escape through cracks in the insulation smaller than the human eye can see.
A test done on a transformer. The voltage at the power frequency is ramped up to verify the transformer is capable of handling the stresses due to switching and natural phenomena (lighting strikes).Withstand Voltage:The voltage which has to be applied to a test object under specified conditions in a "withstand test" is called the "withstand voltage".
Procedure for sumpners test is the single phase transformer. This is a back to back test.
sumpners test is performed to find core losses and copper losses.here we can find effieciency and regulation by actually simulating the loading conditions.hence the results obtained by this method are more accurate than oc and sc test where loading conditions are absent.we can perform heat run test which is an advantage of sumpners test as both losses occur simultaneously
Its a test conducted on two identical 1- phase transformers to determine the efficiency at different loads (without actually connecting any load).
OC and SC tests are used for predetermining the efficiency and % voltage regulation. It is more efficient test for a transformer than sumpner's test for 2 reasons. 1. two identical transformers are readily not available 2. two separate power supplies are required for the sumpner's test, whereas OC and SC are simple and best
It is called the star test. It will not be called the taks test anymore, but it will be called the star test.
A group of test tubes are called samples.
fabere test
it is called drug addict test
a pregnancy blood test is called Beta HCG
Bigger, fatter test tubes are usually called boiling tubes.
It is often called a tuberculin skin test, or a Mantoux test.
The test for hydrogen gas is called the "squeaky pop" test. This test involves igniting a sample of hydrogen gas, which produces a distinctive "squeaky pop" sound.