7.2KV 3150A High Current Medium Voltage Electrical Switchgear

Standards compliant:

GB3906-2006 "3.6~40.5kV AC metal-enclosed switchgear and control equipment"

GB11022-89 "General Technical Conditions for High Voltage Switchgear"

IEC298(1990) "AC metal-enclosed switchgear and control equipment with rated voltages above 1kV and 50kV and below"

DL404-97 "Technical Conditions for Ordering Indoor AC High Voltage Switchgear"

Normal usage environment

◆ Surrounding air temperature: maximum temperature level +40 ℃, minimum temperature -15 ℃;

◆ Loved one humidity: Daily standard relative moisture: ≤ 95%, everyday typical water vapor pressure does not go beyond 2.2 KPa; Monthly average loved one humidity ≤ 90%; The month-to-month average water vapor pressure does not exceed 1.8 KPa; Elevation: ≤ 1000m;

◆ Quake strength: not going beyond level 8;

◆ The bordering air should not be considerably contaminated by destructive or combustible gases, water vapor, and so on;

◆ No locations with serious vibration;

◆ When utilizing beyond the normal conditions specified in GB3906, the individual and our firm will discuss

Functions and features of 7.2KV 3150A High Current Medium Voltage Electrical Switchgear

The 7.2KV 3150A High Current Medium Voltage Electrical Switchgear is crafted in accordance with the armored metal-enclosed switchgear specified in GB3906-91. It consists of two main parts: the cabinet and the central pull-out portion (also known as the handcart). The cabinet is divided into four distinct compartments. The enclosure protection level is IP4X, while the level is IP2X when the doors of each small compartment and the circuit breaker room are open. The switchgear features overhead incoming and outgoing lines, cable incoming and outgoing lines, and various functional solutions. Once arranged and combined, it forms a comprehensive power distribution system device. The switchgear can be installed, debugged, and maintained from the front, allowing for back-to-back, double, and wall installations, which enhances safety, flexibility, and space-saving.

Main technical parameters of 7.2KV 3150A High Current Medium Voltage Electrical Switchgear

Main technical parameters of vacuum switchgear

If the starting current of the 3-10KV motor controlled by the circuit breaker is below 600A, it is necessary to include a metal zinc oxide lightning arrester. The user and our company will discuss the exact specifications, ensuring that when the circuit breaker is utilized to disconnect the capacitor bank, the rated current of the capacitor does not surpass 80% of the rated current of the circuit breaker.

Technical parameters of operating mechanism

The 7.2KV 3150A High Current Medium Voltage Electrical Switchgear is created according to the armored metal confined switchgear in GB3906-91. The whole is composed of two mainparts: a cabinet and a main with drawable extra part (i.e. a handcart) (see Figure 1). The cabinet is divided right into four separate areas, with an unit protection level of IP4X. When the doors of each area and circuit breaker room are opened, the defense degree is IP2X. Geared up with above incoming and outward bound lines, cable incoming and outward bound lines, and other functional systems, set up and combined to form a complete collection of power distribution system gadgets. This switchgear can be set up, debugged, and preserved from the front, so it can be back-to-back, prepared in a dual arrangement, and set up versus the wall, improving the safety and security, versatility, and reducing the impact of the switchgear.

◆ Shell and others

The major structure of the switchgear is made of aluminum zinc thin steel plate, processed by CNC maker device, and adopts several folding process, which not only has the advantages of high accuracy, solid corrosion resistance and oxidation resistance, but additionally makes the cabinet lighter in weight, greater in mechanical strength, and extra cosmetically pleasing in look compared to other similar tools cabinets because of the use of multiple folding process. The cupboard adopts a constructed structure, attached by rivet nuts and high-strength bolts, which shortens the handling cycle, enhances the universality of components, inhabits less space, and is convenient for organizing production.

◆ Handcarf

The handcart frame is put together from thin steel plates processed by CNC equipment devices. The handcart and closet are shielded and collaborated, and the interlocking device is secure, trusted, and adaptable. According to their usage, handcart can be separated right into circuit breaker handcart, voltage transformer handcart, metering handcart, seclusion handcart, and various other kinds of handcart. According to component and block type variations, handcart of the very same spec can be freely exchanged 100%. The handcart has a disconnection placement, a screening placement, and a functioning position inside the cupboard. Each setting is geared up with a positioning gadget to guarantee reputable. interlocking. The procedure needs to be accomplished according to the interlacing security actions operation procedure. All handcart utilizes nuts and screws to move and exit, and its operation is light and flexible, ideal for working personnel to run. When the handcart needs to be moved far from the cabinet, a dedicated transfer vehicle can be quickly taken out for different evaluations and maintenance, And it embraces a mid placed style, with a little quantity for inspection, maintenance, and ease.

◆ Area

The primary electrical components of the switchgear have independent compartments, namely: circuit breaker handcart room, busbar area, cable room, relay instrument area. The protection level in between each compartment gets to lP2x; Except for the relay, all other 3 styles have their very own stress alleviation channels. Due to making use of a central design, the cable television room area is significantly boosted, allowing the devices to attach several cable televisions.

◆ Circuit breaker Area

Tracks are installed on both sides of the area for handcart 5 to relocate and slide from the disconnected position and examination placement to the working position inside the cupboard. The dividers 3 (valve) of the fixed call box 16 is mounted behind the rear wall surface of the handcart area. When the handcart relocates from the separated setting examination setting to the functioning position, the flaps on the top and reduced fixed contact boxes are linked with the handcart and instantly open. When relocating the contrary instructions, the flaps instantly close till the handcart go back to a particular setting and totally covers the fixed contact box, developing effective seclusion. Due to the different procedure of the upper and lower valves, throughout upkeep, the shutoff on the live side can be locked to ensure that upkeep personnel do not touch the online body. When the breaker room door is shut, the handcart can likewise be operated.

Through the observation window of the center door, the setting of the handcart being taken care of and closed in the area can be observed, and the power storage space condition can be shown.

◆ Busbar Compartment

The primary busbar 18 is a single device spliced and connected to every other, dealt with by the main busbar 20 and the static get in touch with box. The main busbar and linking busbar are copper bars with rectangular cross-sections, made use of for high currents. When composite, double busbars are made use of to assemble them. The branch busbar is linked to the static call box 16 and the primary busbar via screws and does not need any other support. For unique demands, the busbar can be covered with warm shrink tubes, insulation sleeves with linking screws, and finish caps. Adjacent closet busbars are repaired with sleeve 19, to make sure that the air barrier retained between the linking busbars can avoid melting in case of inner fault arcs. Sleeve 19 can effectively restrict crashes to this cabinet and not spread to various other closets.

Overall dimensions

Installation of switchgear

Schematic diagram of switchgear structure

◆ The following representation shows the structural parts of the switchgear. All metal modular setting up structure, the cupboard body is made of imported light weight aluminum zinc layered plate with solid anti-corrosion ability, without surface therapy. It is refined by CNC high-precision equipment and embraces advanced numerous folding process. The connection is gotten in touch with rivet nuts and high-strength screws, with high precision, light weight, and excellent stamina.

◆ The switchgear can be outfitted with our company's VS1 series, VD4 collection, ZN65 series and other vacuum circuit breakers, with vast applicability and solid interchangeability. The handcart is furnished with a working position, a testing placement, and positioning and display devices at each placement, making sure security and integrity.

◆ The cable television space can suit as much as 9 single core wires, and the equipment is outfitted with reputable mechanical and electrical interlocking gadgets, fully satisfying the "5 prevention" demands. Each area is geared up with stress relief channels to make sure individual safety throughout operation.