Yce Tan's birth name is Rycelonia Tan.
Chinkee Tan's birth name is Ferdinand Tan.
Teck Tan's birth name is Tan Chor Teck.
Guinness over Bass
Mika Tan :)
6
tan delta test means we test the healthiness dielectric strength of bushing present condition,at this same time we maser capacitance also .conductor surrounding oil impregnated paper is there it is terminated at test point,it is equivalent to capacitance .Healthy capacitor current and by 90 degrees.during deterioration time some resistance added,resultant is leakage current,it is checked by we conducting tan delta.this resultant values compared to manufacturer reports and factory test reports.tan delta value always in percentage.Allowable value for tan delta test is 0.8 %tan delta also called loss angle.test details : we are using megger kit,it is combination of control unit and transformer unit.we are applying 2kv 5kv 10kvour kit capacity is 12kv. you have one dought here ,Wye we are applying higher voltages for higher transformers bushings,you remember one thing here we increase voltage ,will not increaseloss factor (tan delta)
Tan Delta is a condition monitoring test. Value of Tan Delta very much depends upon the temperature and recommended values at 20Deg.C is 1. Values at other temperatures can be determined by using correction factor given in IEC76
In a pure capacitor current leads the voltage by 90 degrees. when a resistor is introduced in between the current leads an angle less than 90 degrees. Similarly in a Dielectric material when a cavity or deterioration starts , the life of the material starts deteriorating , as there is a resistance getting added and hence leakage current increases In tan Delta we find the difference in the angle and periodically note down the pace at which deterioration takes place.
a Doble test, often called a power-factor test is the most effective known field test procedure for the early detection of bushing contamination and deterioration. This test also provides measurement of ac test current which is directly proportional to bushing capacitance
Less than 65 ohms
burn rubber out and cut shell out of the arm bushing holefreeze new bushing in freezergrease hole welltap or press new bushing into arm bushing hole
Seng-Chuan Tan has written: 'Stress concentrations in laminated composites' -- subject(s): Testing, Composite materials, Laminated materials, Stress concentration
Tan Delta is also known as the 'loss angle' or 'dissipation factor'. It is used to test the level of degradation in insulation materials of electrical machines and power cables. The winding insulation of an electrical machine, or a cable free from defects, will act as a perfect capacitor, that is, it will only store energy and not dissipate it. In an ideal capacitor, the voltage and current are out of phase by 90 degrees and the current flowing through the insulation is purely capacitive Ic. However, dielectric losses within the insulation due to deterioration or other factors, will result in the reduction of the resistance in the insulation. This will in turn increase the resistive current Ir. The phase angle between the current and voltage is now less than 90 degrees, and the extent to which this is less than 90 degrees gives the level of degradation in the insulation. So this 'loss angle' is required to be measured. If the angle is Delta, then the tangent of Delta can be calculated by dividing is 'opposite over adjacent', which is Ir/Ic. There are various methods of how this is tested and industrial standards, such as the IEC provide acceptable values of Tan-delta for different types of insulation.
Chris Bushing was born on 1967-11-04.
The reason is that internal voids within the insulation will discharge as the voltage rises; once discharged, they will not do so again at some higher voltage. if all voids become discharged, theoretically the plot of tan delta versus voltage would level off to a horizontal line. In effect, tip-up becomes "negative".
You don't. That is a ripoff. Testing and replace out of range sensors is a more reasoable projct.