High Voltage Disconnect Switch Type

According to the different installation methods, they can be divided into outdoor disconnectors and indoor high-voltage disconnectors [4]. Outdoor disconnectors are disconnectors that can withstand wind, rain, snow, dirt, condensation, ice and thick frost, and are suitable for installation on terraces. According to the different insulating support structures, they can be divided into single-column disconnectors, double-column disconnectors and three-column disconnectors. Among them, the single-column disconnector directly uses the vertical space under the overhead bus as the electrical insulation of the break. Therefore, it has the obvious advantages of saving floor space, reducing the number of lead wires, and the opening and closing status is particularly clear. In the case of ultra-high voltage transmission, the substation adopts a single-column disconnector, which can save floor space more significantly [4]. According to the different voltage levels, low-voltage disconnectors When electrical equipment is repaired [5], it is necessary to cut off the power supply, separate the maintenance part from the live part, and maintain an effective isolation distance. It is required that the break can withstand the overvoltage withstand level. Knife switches are switching devices used to isolate power supplies. Knife switches that isolate power supplies are also called isolating switches. Isolating knife switches are generally no-load on-off devices that can only connect or disconnect "negligible currents" (referring to busbars with voltage, capacitive currents of short cables, or currents of voltage transformers). Some knife switches also have certain on-off capabilities. When their on-off capabilities are adapted to the required on-off currents, they can connect or disconnect electrical equipment or a part of a complete set of equipment under non-fault conditions. Knife switches used to isolate power supplies must meet the isolation function, that is, the switch break is obvious and the break distance is qualified. Knife switches and fuses are connected in series to form a unit, which is called a knife switch fuse combination device; when the movable part (moving contact) of the knife switch is composed of a fuse-carrying fuse with a fuse, it is called a fuse-type knife switch. Knife switch fuse combinations and auxiliary components such as operating levers, springs, and arc knives can be combined into load switches. Load switches have the ability to connect or disconnect load currents under non-fault conditions and certain short-circuit protection functions.
High Voltage Disconnect Switch
GN series indoor high-voltage disconnector
High-voltage circuit breaker
GW series outdoor high-voltage disconnector
Common high-voltage disconnector models
CR center break disconnector (126kV~252kV)
DR double-sided disconnector (72.5kV~363kV)
KR double-column horizontal telescopic disconnector (126kV~550kV)
PR single-column double-arm vertical telescopic disconnector (126kV to 500kV)
SR horizontal rotation single-side break disconnector (40.5kV)
VR V-type center break disconnector (126kV)
YR single-column single-arm vertical telescopic disconnector (126kV~550kV)