Does this 3 prong 250V outlet in the Philippines have two hots and a neutral or hot/neutral/ground?
It looks like the Philippines uses a system similar to Europe, so it would be 1 hot ( 240V @60 Hz.), 1 neutral, and a ground.
Typical Worldwide Voltages
Japan, Taiwan, North America and some parts of northern South America.
100 - 120/240V  ± 5% @ 60 Hz.
Europe, Africa, Asia, Australia, New Zealand and most of South America
230V  ± 6% @ 50 Hz.
Here is a map of voltages and frequencies around the world from Wikipedia.