What is the current application status and development trend of medium-voltage switchgear?
06/11/2025
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Application of Indoor Load Switches in Indoor Power Distribution Rooms
In indoor switchgear rooms, indoor load switches are key devices designed to meet the core requirements of "medium and low-voltage distribution, flexible control, and simplified protection." Their application centers on three primary scenarios: "circuit control, safety isolation, and fault coordination." The specific implementation methods and value are as follows:1.Power Control Unit for Terminal Loads: Load switches are commonly used in branch circuits of low-voltage distribution panels within
08/28/2025
Differences Between Load Switches and Disconnectors
What is a Load Switch?A load switch is a control device equipped with a simple arc-extinguishing mechanism, capable of opening and closing circuits under load. It can interrupt a certain level of load current and overload current, but cannot interrupt short-circuit current. Therefore, it must be used in series with a high-voltage fuse, which relies on the fuse to clear short-circuit currents.Functions of a Load Switch:Switching and Closing Function: Due to its certain arc-extinguishing capabilit
08/27/2025
Combined Application of Fuses
Medium-voltage current-limiting fuses are primarily used for protecting loads such as transformers and motors. A fuse is a device that, when the current exceeds a given value for a sufficiently long duration, interrupts the circuit in which it is inserted by melting one or more specially designed and proportioned components. Current-limiting fuses may have difficulty clearing intermediate current values (overloads between 6 to 10 times the rated current), so they are typically used in combinatio
08/27/2025
Operation and Use of Expulsion Type Isolators and Expulsion Type Fuses
High-voltage disconnect switches (or fuses) do not have arc-extinguishing capability, but they provide a clearly visible break point. Therefore, they are used solely as isolation components in a circuit. They are installed at the beginning of a circuit or in front of components requiring maintenance. When a circuit needs to be de-energized for maintenance, the power is first interrupted using a switching device, and then the disconnect switch is opened. This ensures a clearly visible break in th
08/26/2025
