Revised planning guidelines on wind farms will result in distances between pylons and dwellings of between 550m and 1km.

RTÉ's Prime Time has learned that the distances will be determined based on land use, topography, pylon height and the distance from towns and villages.

Provisions will also be made for more intensive use of certain sites.

The current planning guidelines have been in place since 2006.

More than 7,000 submissions were received in response to a draft set of guidelines published last year.

This has contributed to a delay in publishing the updated guidelines.

It is understood the Department of Energy has concerns that the proposals as they now stand could actually lead to a decrease in current wind power output.

If that happens, Ireland could face the prospect of fines of upwards of €600m from the EU for failing to reach agreed renewable energy targets.