After 36 domestic and international flights were delayed between Sunday night and Monday morning due to two consecutive red lightning alerts, the Manila International Airport Authority (Miaa) assured passengers that the Ninoy Aquino International Airport (Naia) was equipped with lightning
arresters.
Ninoy Aquino International Airport (NAIA) terminals have twenty (20) lightning
arresters which were upgraded in 2016 to ensure better protection coverage.
MIAA General Manager Ed Monreal cited that there are 20 lightning
arresters to ensure better protection coverage.
In practical terms, the lack of a spark
arrester is not likely to be a safety problem if you are only burning gas.
A surge
arrester is considered to be explosion-proof if fragments of a structure that fell to the ground after the destruction of the SA are left in a circle with a diameter of not more than D = 1.2 x (2 x [H.sub.sa] + [D.sub.sa]), where [H.sub.sa], [D.sub.sa] are the height and diameter of the Sa, respectively; for devices of small height, it is assumed that D = 1.8 m.
SPDs are selected from manufacturer's catalogue with maximum continuous operating voltage 275V, and protection voltage 1250V for
arrester and 800V for suppressor, which are lower than equipment withstand voltage of observed overvoltage category I [4].
A surge
arrester is installed near the cable junction.
Although the IEEE model provided an accurate approximation of the surge
arrester behavior, its main draw-back was the complexity of using this model to approximate the surge
arrester characteristic using data provided by the manufacturer.
What exactly a "gas and dust
arrester" is was left unclear, as was the definition of pollution-causing "units." KCNA added that the Environmental Protection Institute of the Ministry of Land and Environment Conservation has increased research on "pollution-free vegetable products."
Robertson said the problem was caused by a faulty lightning
arrester, a device designed to shut down the substation in the event of a lightning strike.