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## What is the minimum distance while working close to 11 KV or 440 V overhead lines?

Clearance from Buildings to low, medium and high voltage lines

Voltage | Description | Distance |
---|---|---|

11 KV to 33 KV | Line passes above or adjacent to any building or part of a building | 3.7 Meter |

Above 33 KV | Line passes above or adjacent to any building or part of a building | 3.7+(0.3 for every additional 33 KV ) |

## What distance is safe for 11 kv power lines?

As per the Indian Electricity Act, buildings should maintain a horizontal distance of 1.2 metres from 11kV lines and 4 metres from 66kV lines.

## What is the phase voltage on a 400 volt 3 phase?

Line voltage in a wye system is always the phase voltage multiplied by the square-root of “3” (1.732) and reflects the vector sum of two individual phase voltages present in a three phase system. Thusly, if the line voltage is “400V”, then the phase voltage is 400V divided by the square-root of “3” (1.732), which is 230V.

## What is the phase voltage on a 400V Wye?

“400V” on a 400V 3-Phase wye-connected power supply indicates its line voltage. Line voltage in a wye system is always the phase voltage multiplied by the square-root of “3” (1.732) and reflects the vector sum of two individual phase voltages present in a three phase system.

## What was the minimum phase to phase clearance specified?

• In the same time frame, IEC was considering minimum phase-phase and phase-ground clearances, based on either lightning or switching impulse voltage, for inclusion in IEC Publication 76-3 [5]. At that time, IEC was experimenting with two methods, the first based on BIL and the second on BSL.

## How much phase clearance is needed for 1123 kV?

It is interesting to note that 154 and 311 inches of phase-phase clearance are necessary for 1123 and 1706 kV switching impulse, respectively. Note that the position of the axes has been reversed in this figure. Figure 2. Phase-Phase Clearances in IEC and IEEE Standards