Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

First, the installation of 10 kV high-voltage disconnect switches must meet the following requirements. The first step is to select an appropriate installation location, typically near the switchgear power supply in the power system to facilitate operation and maintenance. At the same time, sufficient space must be ensured at the installation site to accommodate equipment placement and wiring.Secondly, equipment safety must be fully considered—for example, lightning protection and explosion-proo

When performing switching operations, operating personnel must carefully verify that the circuit breaker is indeed in the open position. For three-pole interlocked isolating switches, all three phases must move simultaneously, with a maximum allowable vertical discrepancy of no more than 3 mm, before any opening or closing operation of the isolating switch is permitted.1. Key Points for Closing an Isolating SwitchFor manual operation, operating personnel should first remove the interlock pin bef

Overheating of Busbar Isolating Switches: Causes and Handling ProceduresOverheating of busbar isolating switches is a common electrical equipment defect. If not addressed promptly, the situation can severely deteriorate during a system short circuit—when high short-circuit current flows through the overheated point, potentially causing contact melting or even destruction of the switch.When overheating of a busbar isolating switch is detected, follow these steps for safe handling: Report the defe

Overview of Grounding SwitchesA grounding switch is a mechanical device specifically designed to safely connect a circuit to earth (ground). It is capable of withstanding fault currents for a certain period during short circuits or other abnormal conditions, while not carrying load current during normal operation. Therefore, grounding switches play a crucial role in power systems by ensuring the safety of personnel and equipment.Key FunctionsGrounding switches should be able to perform the follo

Valve Hall OverviewThe valve hall is a specialized building housing the valves of a High-Voltage Direct Current (HVDC) static inverter. These valves are typically composed of thyristors, and in older plants, they may consist of mercury-arc rectifiers. The valve hall is a crucial component of the HVDC system, ensuring its safe and efficient operation.Grounding SystemThe grounding of valve hall components is ensured by highly customized grounding switches. For this purpose, two different types of

This paper proposes and analyzes a two-stage dc-dc isolated converter for electric vehicle charging applications, where high efficiency over a wide range of battery voltages is required. The proposed conversion circuit comprises a first two-output isolation stage with CLLC resonant structure and a second two-input buck regulator. The transformer of the first stage is designed such that its two output voltages correspond, ideally, to the minimum and maximum expected voltage to be supplied to th