What is the minimum ground clearance required for 11KV line passing along the street?
What is the minimum ground clearance required for 11KV line passing along the street?
Clearance above ground of the lowest conductor As per IE Rule 77
| Over head Line Across Street | |
|---|---|
| Low and Medium Voltage | 5.8 Meter |
| Over head Line Without Across or Along Street | |
| Low/Medium /HT line up to 11KV If Bare Conductor | 4.6 Meter |
| Low/Medium /HT line up to 11KV If Insulated Conductor | 4.0 Meter |
What should be the spacing between the two conductors if the working voltage is 11KV?
101 mm – Spacing between two conductors if working voltage is 11 kV.
Is safe distance from 400kV line during the hot line maintenance?
20 m
When a person who is grounded touches it a discharge current flows through the human being. In order to avoid this parking lots are located below the transmission lines the recommended clearance is 17 m for 345 kV and 20 m for 400 kV lines.
Which support for overhead transmission line has the least life?
Wooden poles: It is one of the cheapest types of line supports and used for lines where spans are short, and tension is low. It has very less life.
How far should you stay away from power lines?
1. Work at a safe distance. This is the most important rule: Work at a safe distance from all power lines. The Occupational Safety and Health Administration (OSHA) requires that equipment be kept at least 10 feet away from power lines with voltages up to 50kV.
How to prevent induced current in transmission lines?
The magnitude and the strength of the charge will be related to the mass of the ungrounded metal object and its orientation to the transmission line. Induced current can be prevented or corrected by grounding metal objects near the transmission line. Grounding chains can be installed on tractors.
How is the voltage stepped up in transmission lines?
The voltage is then stepped up by suitable 3-phase transformers for transmission purposes. Taking the generated voltage as 11 kV, the 3-phase transformers step it up to 132 kV as shown. Primary or high-voltage transmission is carried out at 132 kV *. The transmission voltage is, to a very large extent, determined by economic considerations.
What are the advantages and disadvantages of high voltage transmission lines?
The high voltage transmission has some advantages as compared to low voltage and high level of current transmission i.e. low power factor, corona loss, skin effect, l 2 R (Line losses), Heat etc. The only disadvantages of high power transmission is distance, insulation of the line and height of towers.
What is an A11 kV line?
A 11 kv line transmits power at 11 kv from the dispatch center to load centers. This is the optimum, lowest transmission power level. The link above will also go into the other power levels concerned.