Isolating Switches According To Voltage Levels

Low voltage isolation switch
When repairing electrical equipment [5], it is necessary to cut off the power supply, separate the repaired part from the live part, and maintain an effective isolation distance. It is required to withstand overvoltage withstand voltage levels between its breaking points. Knife switch is a switching device that serves as an isolation power source. The knife switch that isolates the power supply is also known as an isolation switch. Isolation knife switches generally belong to no-load on-off appliances and can only connect or disconnect "negligible current" (referring to the capacitive current of voltage buses, short cables, or voltage transformers). Some knife switches also have a certain breaking capacity, which can be used to connect or disconnect a part of electrical equipment or a complete set of equipment under non fault conditions when its breaking capacity is suitable for the required breaking current. The knife switch used as an isolation power supply must meet the isolation function, that is, the switch fracture is obvious and the fracture distance is qualified. The knife switch and fuse are combined in series to form a unit, which is called a knife switch fuse combination appliance; When the movable part (moving contact) of a knife switch is composed of a fuse carrier with a fuse link, it is called a fuse type knife switch. Knife switch fuse combination and additional auxiliary components such as operating lever, spring, and arc knife can be combined to form a load switch. The load switch has the ability to make or break load current under non fault conditions and has a certain short-circuit protection function.
High voltage isolation switch
GN series indoor high-voltage isolation switch
High voltage circuit breaker
GW series outdoor high-voltage isolation switch
Common high-voltage isolation switch models
CR center break isolation switch (126kV~252kV)
DR double-sided isolation switch (72.5kV~363kV)
KR double column horizontal telescopic isolation switch (126kV~550kV)
PR single column double arm vertical telescopic isolation switch (126kV to 500kV)
SR horizontal rotating single side break type isolation switch (40.5kV)
VR V-type center break isolation switch (126kV)
YR single column and single arm vertical telescopic isolation switch (126kV~550kV)