Introduction and Function of High Voltage Switches

The opening and closing time and synchronicity of high-voltage switches are used to measure the mechanical performance of high-voltage circuit breakers. They are bridging devices between transformers and electrical equipment, playing an important role in opening and closing the entire circuit. Measuring the performance of high-voltage switches is also an important factor affecting system safety. Below, we will share the significance of measuring the opening and closing time and synchronicity of high-voltage switches using the GDKC series high-voltage switch dynamic characteristic tester.

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The significance of measuring the opening and closing time and synchronicity of high-voltage switches

Firstly, we recommend using measurement equipment from high-quality manufacturers to ensure the authenticity of measurement data. If the opening time is too long, it will inevitably prolong the time for the circuit breaker to cut off faults, causing oscillation overvoltage and posing a great threat to the safety of the power grid. If the closing time is too long and prolongs the reclosing time, it may cause accidents such as power grid collapse. Therefore, the opening and closing time is very critical and important to the power grid. The different periods of opening and closing can also bring great harm to the safe operation of the power grid. If the different periods are too long, the circuit breaker is equivalent to non full phase operation, and the unbalanced current generated will cause the relay protection device to malfunction. The closing time difference is too large, which may affect the normal neutral point of the power grid and may endanger overvoltage.

The different periods between the same pole and different fracture surfaces affect the safety of the circuit breaker itself. If the same level fracture surfaces are opened at different times and are too large, or even if the contacts are not separated, it may cause the recovery overvoltage borne by the contacts to exceed the allowable value when they are opened, and the arc cannot be extinguished, resulting in an explosion. If the same pole fracture surfaces are opened at different periods, it may cause the pre breakdown time generated when closing to be advanced, increase the closing burden of the structure, reduce the closing speed, and cause the static and moving contacts to melt and refuse to move.

The above is the function and harm of measuring the opening and closing time and synchronicity of high-voltage switches. In daily preventive testing projects, measuring each function as much as possible can effectively prevent accidents from occurring.