Looks like problem with your circuit breaker and/or wiring.... First of all, plug your AC to power socket (the 3 pin large socket). Check that which circuit breaker is installed in the control panel for this socket. It must be no less than 16 Amps (C-16). The wiring must be 7/0.036 or above.
Then check your AC amperage with digital clamp meter or energy-watt meter, from AC turn on to compressor starting (when AC gives a hard click sound, start mild buzzing, and subsequently throwing out cool air). Observe and record the amperage from start to end. It should be maximum 7-8 Amps. If lower than 7 but still tripping, its wiring or circuit breaker problem. If higher than that 8, consult some reliable AC technician.
