Abstract: A server power supply includes a first voltage input line, a second voltage input line, a ground cable, a switch, and a voltage limiting device. The switch and the voltage limiting device are connected in series and located between the first voltage input line and the ground cable. When a voltage of the first voltage input line is greater than a conduction voltage, both the switch and the voltage limiting device are in an ON state, so that the server is protected from a relatively high voltage. When the voltage of the first voltage input line decreases and is less than the conduction voltage after the voltage of the first voltage input line is greater than the conduction voltage, the voltage limiting device is in an OFF state.

Abstract: The present disclosure relates to heat dissipation apparatuses. In an example, a node includes a structural module, a circuit board, a liquid pipe, and a liquid leakage monitoring apparatus. The circuit board is securely mounted on the structural module, and an electronic component including a chip is disposed on the circuit board. The liquid pipe is disposed on the circuit board, and is configured to dissipate heat for the electronic component on the circuit board. The liquid leakage monitoring apparatus includes a drainage pipe sleeved outside the liquid pipe. There is a specific gap between the drainage pipe and the liquid pipe. In response to at least that leakage occurs in the liquid pipe, leaked coolant flows in the drainage pipe.