Abstract: An electric arc eliminating apparatus includes a power supply circuit, a voltage dividing circuit, a contacting unit, a triggering unit, a voltage control switch, an interface and a connector. When the connector is inserted into the interface but not completely connected with the interface, the contacting unit is in an open state, the power supply circuit cannot output electrical power to the connector via the interface. When the connector is inserted into and completely connected with the interface, the contacting unit is in a closed state, a voltage of the power supply circuit is divided by the voltage dividing circuit, the voltage control switch is turned on, the power supply circuit provides electrical power to the connector via the interface.

Abstract: An electric arc eliminating apparatus includes a switch member, an interface, a power supply circuit and a connector. The switch member includes a contacting unit and a triggering unit. The power supply circuit is electrically coupled to the interface via the contacting unit. When the connector is inserted into the interface but does not completely connect with the interface, the contacting unit is in an open state, and the power supply circuit cannot output electrical power to the connector via the interface. When the connector is inserted into the interface and completely connected with the interface, the connector resists against the triggering unit and moves the triggering unit toward the contacting unit, the contacting unit is in a closed state, and the power supply circuit provides electrical power to the connector via the interface.

Abstract: A system for controlling a plurality of power supply units to provide power to a server, includes a priority level definition module and a control module. The priority level definition module defines priority level for each one of the plurality of power supply units. The control module prior power on part of plurality of power supply units, which have high level priority, to provide power to the server.

Abstract: A testing system for a DC-to-DC buck converter circuit includes a multi-meter connected to the DC-to-DC buck converter circuit, an oscilloscope, and a control device. The control device is connected to the multi-meter and the oscilloscope and is configured to adjust the multi-meter and the oscilloscope, and gather data and waves measured by the multi-meter and the oscilloscope. The control device generates a test report according to the data and waves measured by the multi-meter and the oscilloscope. The present disclosure further discloses a testing method based upon the above testing system.