Answer Posted / raveendra nath
PI value is the ratio of insulation resistance at 10
minutes to the 1 minute value...
PI = IR(10 min) / IR (1 min)
For good insulation, PI >= 2
PI more than 1.5 is acceptable...
PI less than <1 indicates Bad insulation
Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
What are the different types of LT Cables?
What is essential to prove safe isolation of electrical circuit?
WHAT IS THE FORMULA FOR CALCULATING CURRENT RATING(DIRECT IN GROUND OR AIR) OF ARMOURED(XLPE) CABLE OF 4C,16Sqmm?
lorteny method
Define early construction of human being
What is the maximum No. of out going mccbs permitted from an LV distribution paqnel? What is the ampere relation between incomer and out going switch gears/mccbs?
What is the function of probe in cro?
what is the role of energy meter in distribution system ?
The advantages of Magnetic flux leakage technique over Ultrasonic technique for non distructive testing of material.
we are having 15kw and 3kw motor both can run in same time , instead of using copper we are using ug aluminium cable , 35 sq.mm is suitable for its current carrying capacity..?
What is the test block protection relay if any body know plz explained
Explain Energy and Power signals?
What will be the diameter of pipe between conservation tank and transformer
hwat type of motor is used in thermal gas turbine hydro nuclear power plants and why
1.what is meaning of curve into a mcb. 2.what is basic reason changing of curve