Patent Number: 7,612,975

Title: Lightning protection

Abstract: A power supply line for powering electronic equipment from a power supply remote from the electronic equipment, having a balanced differential power transmission path 31 connecting the power supply 32 to the electronic equipment 13 and at least one isolating transformer 33, 34 in the power supply line, for providing isolation from ground potential rise associated with lightning surge currents. The invention has particular application to a wireless communications tower having the isolated power supply line for powering masthead electronic equipment 13, and an isolated communications link 21 between the masthead electronic equipment and a network terminal 22.

Inventors: Abraham; Ian (Bishops Stortford, GB), Edwards; Keith (Hutton, GB), Watkins; Mark (Great Dunmow, GB)

Assignee: Nortel Networks Limited

International Classification: H02H 3/22 (20060101)

Expiration Date: 1/03/02017