SVG Isolating Switch: What is the function of an isolating switch?

The isolating switch, also known as the knife switch, is a switching device that plays an isolating role in the circuit. Usually refers to high voltage isolation, which has a great impact on the design, establishment and safe operation of substations and power plants, as well as our daily lives. SVG Isolating Switch Manufacturer: What is the function of the isolating switch?

SVG Isolating Switch Manufacturer: What is the function of the isolating switch?

The isolating switch has the following functions:

1. Change the operating mode of the system. In a dual bus circuit, it can change its circuit by switching the circuit from one bus to another.

2. Ensure the safety of maintenance personnel and equipment. Under normal circumstances, when servicing equipment, it is necessary to use the disconnection point of the isolation switch to isolate the live and non-live parts.

3. Perform small current circuit and bypass current operations. At the time, this function could only be performed with careful technical calculations.

4. SVG isolation switch manufacturer: opens and closes low current circuits and bypass (loop) currents. Such as the charging current of bushings, busbars, joints, short cables, the capacitance current of switching voltage equalizing capacitors, etc.

5. Break the no-load excitation current of a transformer of a certain capacity. This function should be used according to different types and structures.
In addition, the isolating switch can also independently control the following equipment: absorb the capacitive current of the no-load bus; close the running voltage transformer and arrester; close the no-load transformer, the excitation current is less than 5A; when the capacitive current is less than 5A, close the empty After understanding its functions.

SVG isolating switch manufacturer: What are the noteworthy aspects of isolating switches?

1. The isolating switch has no arc extinguishing capability. Generally speaking, when an isolating switch is used at all voltage levels, it does not have the interrupting capability to isolate a line or equipment from the power supply. Therefore, in this case, you can only use other equipment to cut off the line before proceeding. Of course, with the development of science and technology, when buying an isolating switch, it is usually equipped with an interlocking device to prevent misoperation when the switch is under load. In case of failure, it can be used to avoid unnecessary losses.

2. SVG isolating switch manufacturer: The isolating switch has an obvious breakpoint. Once this disconnection point is used to cut off a load or short-circuit current under high voltage, a strong arc will be generated that is difficult to extinguish by itself. In severe cases, it will turn into a light arc, and in severe cases, it will burn the equipment and endanger personal safety. Therefore, it cannot be used to cut off loads or short-circuit currents.

To sum up, do you know the function of the isolating switch? When using the isolating switch, you must keep the relevant precautions in mind to avoid unnecessary accidents.