I'm planning to get some dimmer switches from overseas but am not sure if it's compatible with our circuits? My understanding is that ours should be compatible but just wanna be sure...

This is the specification of the dimmer

Specification Features

    * 220 - 240 V~, 50 Hz
    * Capacity
          o Single dimmer for 230 V and 12 loads (universal): 450 W/VA, min. 50 W/VA
          o Dual dimmer for 230 V and 12 loads (universal): 2x250 W/VA, min. 2x50 W/VA
    * CE approved
    * Universal dimmer with leading and trailing edge capability
    * Auto-reset thermal overload protection
    * Auto-reset short-circuit and over-current protection
    * Lightning strike surge protection
    * 10-year power-failure memory
    * Voltage regulation
    * Precise colour consistency

More info here... : http://www.lutron.com/techInfo/SpecSheets/...0Spec%20Eng.pdf