scope:

General

This Standard applies to electromagnetic noise originating from alternating current, overhead electric power lines, and associated generating and distributing stations.

Equipment Covered

This Standard applies to lines and stations the construction of which was commenced after the date of publication of this Standard.

Voltage

This Standard applies to power lines and stations operating at voltages up to 800 kV phase to phase.

Frequency

The limits apply from 0.15 to 30 MHz.

Weather

The Standard applies during fair weather conditions, as defined in Clause 2. During periods of rain, snow, or fog, noise in excess of the limits stated in Clause 5 may occur.

Operating Conditions

The Standard applies during normal operating conditions of the power system. During infrequent, abnormal operating conditions outside of the control of the power utility, such as operation at unusually high voltages or use of temporary structures following damage to power line towers, noise in excess of the limits may occur.