Overview

The RM68-12 series solid insulated ring network switchgear is a fully insulated, fully sealed, and maintenance free solid insulated vacuum switchgear. All high- voltage live parts are molded using epoxy resin material with excellent insulation performance, which organically combines the vacuum arc extinguishing chamber, main electrical circuit, insulation support, etc. into a whole, and the functional units are connected through fully insulated solid busbar.Therefore, the entire switchgear is not affected by the external environment, which can ensure the reliability of equipmentoperation and the safety of operators.

This ring network cabinet has the characteristics of simple structure, flexible operation, reliable interlocking, and convenient installation. It is suitable for50Hz,12 kV power systems, and is widely used in industrial and civil cable ring networks and distribution network terminal projects. It is used for energy reception and distribution, especially suitable for urban residential distribution, small substations, switching stations, cable branch boxes, box substations, industrial and mining enterprises, shopping malls, airports, subways, wind power generation, etc Used in hospitals, sports venues, railways, tunnels, and other places. Due to its advantages of full insulation, sealing, and shielding, this product is particularly suitable for use in areas with harsh environments such as high altitude, high temperature, humid heat, severe cold, and severe pollution.

Product mix

• The RM68-12 switchgear mainly has three functional units, namely Vunit (circuit breaker unit), Cunit (load switch unit), and Funit (combined electrical unit). Whenthe system requires multiple units to be configured, they can be expanded on either side and arranged according to different design schemes to achieve differentconfiguration requirements.

• Each unit is structurally divided into three parts: instrument room, operating mechanism, and primary circuit. The instrument room can be equipped withmicrocomputer protection (intelligent controller) and other meters, and the operating mechanism is a dedicated spring operating mechanism, which can also beequipped with an electric operating mechanism; The primary circuit adopts APG automatic gel process to completely seal the bus, disconnector and arcextinguishing chamber in epoxy resin, and there are special joints connected with the bus.

• RM68-12 solid insulated switchgear has the advantages of compact structure, full insulation, long service life, maintenance free, small space occupation, safetyand reliability, and is not affected by the working environment. It is widely used in industrial and civil ring networks and terminal power supply. Especially suitablefor small secondary distribution stations, switching stations, industrial and mining enterprises, airports, railways, commercial areas, high-rise buildings, highways,subways,tunnels and other fields.

Product Features

• HLDG-12 solid insulated fully enclosed switchgear is produced using special epoxy resin as insulation material. This epoxy resin has excellent properties:

• Has excellent electrical insulation performance. Dielectric strength 20-30kV/mm, volume resistivity (pv) 1x1013-15 Ω.m;

• Heat resistance can reach over200°C, and it also has good insulation performance at high temperatures;

• Stable chemical properties, excellent alkali resistance, acid resistance,solventresistance, and good resistance to temperature aging and radiation aging;

• The thermal conductivity coefficient is 80x10-2-100x10-2W/mk, which is easy to dissipate heat;

• It has high adhesion to various substances, tight molecular structure, high mechanical strength,and good protection forswitchgear;

• The curing shrinkage rate is small, usually 1% -2%; The coefficient of linear expansion is also very small, usually 6x10/C. So the switch size is stable, the internalstress is small, and it will not crack.

New generation of high-tech products

• Environmental friendliness: Completely eliminate SF6gas insulation, without any pollution or harm to the environment and personnel.

• Compactness: Adopting fully insulated technology, the switchgear has a small volume. compact structure, and wide width X deep X The height is only420mmx730mmx1400mm.

• Insulation: the solid insulation adopts the automatic pressure gel technology, without bubbles, and the partial discharge is only 3pC. All live parts have undergone fullinsulation treatment, with excellent insulation performance to ensure the safety of personnel and equipment.

• Sealing: The sealing structure of the switch ensures that the product is moisture-proof, can be put into operation at any time, stain resistant, maintenance free. and canoperate normally even when immersed in water.

• Maintenance free: Adopting a high-performance and low wear vacuum arc extinguishing chamber, equipped with a reliable spring operating mechanism, ensuring that theequipment is completely maintenance free within 20 years.

• Corrosion resistance: Modular assembly of the cabinet body, using aluminum zinc coated plates and steel plate electrostatic spraying process to ensure equipment corrosionresistance.

• Safety: The protection level of the solid insulated switchgear shell reaches IP3X, the primary circuit and fuse cartridge reach IP67, and there is a complete mechanicalinterlocking device between the fuses, vacuum switches, isolation switches, and grounding switches inside the equipment to ensure the safety of operators and operation.

• Scalability: Solid insulated switchgear adopts a modular structure design, making it easy for users to combine and expand according to their respective power supply schemes.

• Quick installation: Adopting European style cable head insertion and extraction method for installation, convenient and fast.

• Convenient replacement of fuses: After unlocking the corresponding mechanical interlock through the operating mechanism, the fuse can be manually pulled out for quickand easy replacement.

• Flexible operation and control: In addition to normal manual operation, the main switch, isolation switch, and grounding switch can all be optionally equipped with electricoperation.Strong support for distribution network automation and intelligence.

• High degree of intelligence: optional with the intelligent controller developed by our company, it can remotely control, telemetry, and communicate with the switchgear andsubstation site, enabling decentralized control and convenient centralized control.

• Measurement function: capable of measuring circuit current, voltage, power, transformer operating temperature, and environmental temperature.

• Protection function: It can achieve various protection functions, such as overcurrent protection, quick break protection, zero sequence protection, directional groundingprotection, etc.

• Event recording function:With power failure memory function, it can record the time and type of events.

• Interlocking function: When the vacuum switch is in the closed state, the isolation switch cannot be operated; when the cabinet door is open, the grounding switch cannot beoperated, and the isolation switch cannot be closed; When the isolation switch is opened, the grounding switch can only be closed; When the grounding switch is opened, the isolation switch can only be closed.

Main technical parameters

Security and protection

• Visual fracture of isolation knife

In front of the cabinet, there is a visible window for the isolation fracture, which allows you to view the three working positions of isolation closing, isolation opening, andgrounding closing, making it convenient for on-site staff to inspect and determine the position of the isolation knife, making it very safe.

• Internal combustion arc design

Internal arcing pressure valve: When arcing occurs inside the product, the pressure will be released from the pressure relief valve and the arcing will be discharged into thecable trench to prevent accidental injury to the operator.

• Excellent environmental protection

It is designed with environmentally friendly materials, does not use SF6 gas as the arc extinguishing medium and insulation, and has no pollution to the environment.The primary circuit adopts the least contact design to ensure low energy consumption during operation.