DISTRIBUTING BOARD CAPABLE OF ADJUSTING POWER FACTOR AUTOMATICALLY

摘要

The present invention provides a distribution board with an automatic power factor adjusting function capable of preventing contact point damage due to the arc generation of a main electron contactor. The distribution board with the automatic power factor adjusting function is strong on a surge using an electron contactor and passes through a resistance element in the beginning of power factor control. The distribution board with the automatic power factor adjusting function according to the present invention comprises; a phase detection unit which detects one phase among three phases and outputs it with a square wave of power frequency; a phase setting unit which sets an intermediate phase of residual two phases which are not detected by the phase detection unit and outputs it with the square wave of the power frequency; a dividing unit which receives an output of the phase setting unit and divides the output into a frequency of a predetermined square wave shape and outputs it; a power factor adjusting control signal generating unit which outputs a power factor adjusting control signal by up-counting or down-counting the output of the phase detection unit; a power factor adjusting switching unit including multiple switching elements which are switched by the power factor adjusting control signal; and a power factor adjusting unit which intermits a part or all of multiple capacitors having a different capacity to common power according to the switching of the power factor adjusting switch.