Why used in layer by layer charcoal and salt used in earth
pits.
Answer Posted / nimish
because charcoal is a good conductor of electricity and also
charcoal and salt helps to maintain the low resistance path
for fault current.
Is This Answer Correct ? | 27 Yes | 17 No |
Post New Answer View All Answers
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
What is the range of the stator resistance of 3 phase induction motor?
how does directional relay work incase of ac ?
What is electrical diversity factor in electrical installations?
How to calculate Air conditioning capacity for a telecom BTS shelter?
What are two contours of nichols chart?
In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?
how can we save enegry by using VFD for Resiprocating Air compressor which is having more unloading running hours
Define ohm’s law for a.c (alternating current)?
What are the different losses In a de mac1une'! t.xplam
in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.
to hook up ten 50 amp rv pedastels at a lenth of 600 feet from the service what size will my service need to be and the size of wire will I have to run to each pedastel in series??????
what percent do you derate your copper wire when you change from copper buss to copper wire
in the case of 6.6kv motor starter combination contain fuses on it VCB. but in 11KV motor starter combination Fuses are not using in it's VCB why?
write circuit diagram for a motor rotate in forward direction once it started and when pressed the same button it should rotate in anticlockwise.