What is the permissible value of earth resistance!
- 11 Answers
- 34815 Views
- Torrent Power, I also Faced
- E-Mail Answers
Answer Posted / preethi
may be earth resistance value is considered as ideally zero.but it is mostly less than 1 ohm.
| Is This Answer Correct ? | 12 Yes | 5 No |
Post New Answer View All Answers
Do u know any one? how to find out in motor rated amps? formula?
In Electrical 'Single Line Diagram' cable nomenclature shows "2 X 1C X 630sq.mm to be provided for one incomer. The question is how many cable to be proved for one Incomer.
Why reactors use before incoming of ac vvfd drive?
how does a shunt reactor maintains the bus voltage???
What are dcs and plc?
i am studying in final year can i allowed for 23rd UES of Indian army
In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above
How many types of instrument cables are there?
If i have two 3000 kW motors and the whole facility requires a 10 MVA transformer. What would be better installing two 5 MVA transformers(one for 1 motor ) or just a single 10 MVA transformer for both of them. Give reasons for your answer.
advantage and disadvantage of team work?
When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
if in 3-phase system voltage=440V,frequency=60Hz, current=400A. then if it is single phase then current=? and if it is single phasing then current=?
what is the maximum temperature rating of a thhn insulated conductor?
what is reactive power?, why its measured in VA ? is it transient behavior of system?
What it the purpose of parallel phasing transfomers??
