The invention ensures that a single and consistent reply is made to ARP request in a system of connected IP networks. A PIPID controller is designed to apply modulation index control signals to the generator side-converter since the modulation index of the generator side-converter has been determined to have the higher controllability to damp the oscillatory modes of the system when the STATCOM is located at the grid side converter. The cover is biased to maintain contact with the glass plate via the pad. Bind supporter plug-ins are assigned to selected ones of the program products and used for supporting the binding procedure by providing bind services to the setup infrastructure. The heat sink includes a thermally conductive body having a heat absorbing section which is inserted within the chip stack, and heat transfer and dissipating sections which are located outside of the chip stack. By disturbing the mechanically unreliable connection, the electrically intermittent connection can be caused to fail altogether and thereby reveal the defect as a test signal is carried through the printed circuit board.