What is the Polarisation index value ? (pi value)and
simple definition of polarisation index ?
- 15 Answers
- 75966 Views
- Essar, I also Faced
- E-Mail Answers
Answer Posted / rajendra
PI = Insulation resistane after 10min/Insulation resistane
after 1min.
or IR10/IR1 or IR+IL+IP/IR+IL
IR Conduction current
IL Surface leakage current
IP Porising current of water molecule presnt in the
Insulating matrials(usually zero after 10min)
Above 2 is adequate to run the machine below 2 needs
improvement??
| Is This Answer Correct ? | 20 Yes | 4 No |
Post New Answer View All Answers
If Neutral Grounding Resistor (GR) failed/shorted. Is it repairable.
Why it need to form a capcitor when it not been in use from three or two year. Plz describe it technically.
How much kv gas generator is needed to run 2 hp and 1 hp airconditioners, plus a refrigerator and 4 Tvs
Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?
Why dry type cast resin transformers tap link blast in HV side while power shut down times on load?
why zero sequence impedance measurement is not applicable for single phase GT
difference between high and low impedance BUS BAR relay??
In synchronous motor, how the field current is related to armature current..i know its inversely proportional..but concept wise...i was nt clear....pls help me...
What is the actual calculation for transformer short circuit test?.
What is force on parallel conductors ?
PLEASE TELL ME ABOUT QUESTION PAPER OF UPCL ENTERENCE EXAM.
Electrical 'C' license full abbreviation , and full form
Readings of ER300P Trivector meter
the winding of Generator and Motor is star or in delta ? and why
what is solkor relay and which condition it will act?
