Do you know how to measure the earth resistance?
- 7 Answers
- 13382 Views
- Manhattan, I also Faced
- E-Mail Answers
Answer Posted / ashok mishra
by earth tester
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these
Hello sir i m student of gtu .what is idp.
how to calculate single phase motor efficiency ?
what is RNG in the DG synchronizing by PLC?
What do you mean by the zone of protection?
Fantio of tranformer
what are the range of memory address in plc for L&T lx7 4A
dg started in plc mode and load taken later one battery terminal connection will be disconnected by loose connection what will happen for dg and shall we connect battery terminals while dg in load time?
What should be the length of transmission line so that we can see/obtain the full sine wave of voltage??
What are the commonly used schemes for the bus zone protection?
what is effect of 5amp fuse on 2mva pry protection of transformer
List examples of current sources?
1. Can a 12v DC choke operate a 60v/12w PL lamp ? 2. Can a 230v ballast fire / operate a 60v/12w PL lamps.
what reactive how to maintain
