XGN15-24 AC high-voltage SF6 ring main unit

The XGN15-24 AC high-voltage SF6 ring main unit is a new-generation high-voltage product developed by Daya Electric Group using advanced overseas technology to meet domestic electrical and urban-grid upgrading requirements.

After rigorous type testing and extended trial operation, all technical performance indicators meet national standards. The main switch, operating mechanism and components use Daya Electric Group's own FLN36-24 SF6 switchgear, with manual and electric operating options.

The cabinets are made of aluminum and zinc sheeting, which is processed by the numerical control machine bed and has reliable mechanical locking and error-proofing functions. This product has significant characteristics such as small size, light weight, outer beauty, simplicity of operation, long life, high parameters, pollution-free and low maintenance.

Extensive use is made of industrial and mining enterprises, high-rise buildings, residential subdivisions, schools, etc. for power supply and terminal distribution of the 24KV electrical distribution system.

The circuit cabinet contains a mix of sulphur hexafluoride load switches or sulphur hexafluoride load switches and smelting machines that can switch and cut the loads, switch the assigned short circuit current, break the empty circuit current of transformers, and when combined with a breaker, can break 31.5 KA short circuit currents once, to control and protect the power system.

Altitude: no more than 2500m.

Ambient temperature: upper limit + 40°C, lower limit - 5°C.

Relative humidity: The daily average is not more than 85% (+25°C).

Seismic intensity: No sites with severe vibrations and bumps or vertical tilts of up to 5 degrees.

Environmental conditions: No explosive hazard sites.

Note: If the normal conditions of use are exceeded, the user may determine in consultation with the manufacturer.

Note: the XGN15-24 modular SF6 ring main unit consists of 4 parts: ① busbar compartment; ② main switch; ③ cable compartment; ④ operating mechanism, interlocks and low-voltage controls.

Main room 1: The main room is placed on top of the cabinet. The main parent lines are connected in the main room and pass through the entire switchboard.

2 Load switches: The switch room contains a sulphur hexafluoride load switch (FLN 36 or FLN 56), the shell of the load switch is filled with epoxy resin, the gas filled with sulphur hexafluoride (SF6) is an insulation medium with an observation hole in the shell. The switch room may, at the request of the customer, install a gas density sheet for SF6 or a gas density unit with an alarm contact.

Cable Room 3: The load switchboard has a large cable room, mainly for cable connections, allowing single or triple-chip cables to be connected using the simplest non-shield cable head, while at the same time sufficient space can also accommodate elements such as mine escapers, current sensors, lower ground switches, etc. The cabinet doors are designed to have observation windows and security locks. Cable floor panels are equipped with seals and appropriate cable clips with support frames. Cable floors and door frames can be removed to facilitate cable installation.

④ Operating mechanism, interlocks and low-voltage control compartment: the interlocked low-voltage compartment also acts as the control panel. It contains a spring operating mechanism with position indicator and mechanical interlocks. Auxiliary contacts, trip coils, emergency trip mechanisms, capacitive voltage indicators, key locks and motor operators can also be fitted. The complete upper unit is replaceable.

The XGN15-24 Modular Ring Switchboard, produced by this company, is made of aluminum and zinc plates, which are processed through a number of control machine beds, and are more beautiful than the shape of traditional business products. They are stronger and more stable, owing to the small size of the SF6 ring cabinet (500 mmx high by 2000 x 1200 mm deep), the simpleness of the structure, the absence of maintenance and the advantages of fair prices, among others, which are highly favoured by the market. The company ' s products have been extensively applied and operate safely in Jiangsu.

1. Main circuit programme numbering, use, single-line system charting, organization charting and flat layout of the distribution room, etc.

2. Accompanying circuit wiring, endline organization.

3. The type, specification, quantity of electrical components within the switch equipment.

4. Requirements for the control, measurement and protection of switches and other locking and automatic devices.

5. If a busbar bridge connection is required between switchgear units or for an incoming panel, specify the busbar bridge's rated current-carrying capacity, span, height above ground and any other specific requirements.

6. Where annexes and spare parts are required, categories and quantities should be presented.

7. Switching equipment is used under special environmental conditions and shall be specified at the time of ordering.