7.2KV 2500A High Current 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 level: maximum temperature +40 ℃, minimum temperature level -15 ℃;

◆ Loved one moisture: Daily average relative moisture: ≤ 95%, day-to-day ordinary water vapor pressure does not surpass 2.2 KPa; Month-to-month typical relative humidity ≤ 90%; The month-to-month average water vapor stress does not surpass 1.8 KPa; Altitude: ≤ 1000m;

◆ Earthquake intensity: not going beyond degree 8;

◆ The surrounding air must not be substantially contaminated by corrosive or flammable gases, water vapor, and so on;

◆ No locations with severe vibration;

◆ When using beyond the normal problems specified in GB3906, the individual and our business shall negotiate

Functions and features of 7.2KV 2500A High Current Electrical Switchgear

The 7.2KV 2500A High Current Electrical Switchgear is crafted in accordance with the armored metal-enclosed switchgear standard GB3906-91, comprising two main components: the cabinet and the central pull-out part, also known as the handcart. The cabinet is partitioned into four distinct compartments, offering an enclosure protection level of IP4X. When the doors of each small compartment and the circuit breaker room are opened, the protection level is IP2X. Equipped with overhead incoming and outgoing lines, cable incoming and outgoing lines, and various functional solutions, this switchgear forms a comprehensive power distribution system device after arrangement and combination. Its front-mounted design enables installation, debugging, and maintenance from the front, allowing for back-to-back, double, or wall-mounted installation, which enhances safety, flexibility, and space efficiency.

Main technical parameters of 7.2KV 2500A High Current Electrical Switchgear

Main technical parameters of 7.2KV 2500A High Current Electrical Switchgear

If the starting current for the 3-10KV motor controlled by the circuit breaker is lower than 600A, it is necessary to include a metal zinc oxide lightning arrester. The user and our company will discuss the specific conditions. For disconnecting the capacitor bank using the circuit breaker, the rated current of the capacitor should not exceed 80% of the circuit breaker's rated current.

Technical parameters of operating mechanism

The 7.2KV 2500A High Current Electrical Switchgear is developed according to the armored steel confined switchgear in GB3906-91. The whole is composed of 2 mainparts: a cupboard and a main with drawable extra part (i.e. a handcart) (see Figure 1). The closet is divided right into four separate compartments, with an unit protection degree of IP4X. When the doors of each area and breaker area are opened, the defense level is IP2X. Equipped with overhead inbound and outbound lines, cable television inbound and outward bound lines, and various other practical schemes, organized and incorporated to develop a total collection of power circulation system devices. This switchgear can be mounted, debugged, and maintained from the front, so it can be back-to-back, prepared in a dual setup, and mounted against the wall, enhancing the security, flexibility, and decreasing the impact of the switchgear.

◆ Covering and others

The main framework of the switchgear is made from aluminum zinc thin steel plate, processed by CNC machine tool, and embraces multiple folding process, which not just has the advantages of high precision, solid rust resistance and oxidation resistance, but likewise makes the closet lighter in weight, higher in mechanical toughness, and extra cosmetically pleasing in look compared to various other comparable equipment closets due to using several folding procedure. The cabinet embraces a set up structure, attached by rivet nuts and high-strength bolts, which reduces the processing cycle, improves the universality of parts, inhabits much less area, and is convenient for arranging production.

◆ Handcarf

The handcart frame is constructed from slim steel plates refined by CNC device devices. The handcart and cabinet are protected and worked with, and the interlocking device is safe, trusted, and flexible. According to their use, handcart can be separated into circuit breaker handcart, voltage transformer handcart, metering handcart, seclusion handcart, and various other sorts of handcart. According to module and block type variations, handcart of the same specification can be freely exchanged 100%. The handcart has an interference placement, a screening placement, and a functioning position inside the cupboard. Each setting is outfitted with a positioning device to make certain trusted. interlocking. The procedure must be carried out according to the interlacing protection procedures operation procedure. All handcart utilizes nuts and screws to relocate and exit, and its operation is light and adaptable, appropriate for working personnel to run. When the handcart needs to be relocated far from the cabinet, a specialized transfer vehicle can be easily taken out for numerous evaluations and upkeep, And it embraces a mid installed layout, with a small quantity for assessment, upkeep, and ease.

◆ Area

The primary electrical components of the switchgear have independent areas, particularly: breaker handcart area, busbar space, cable television area, relay tool area. The protection degree between each area gets to lP2x; Except for the relay, all other three formats have their very own pressure relief networks. Because of the use of a main format, the cable television room space is greatly increased, permitting. the devices to link several cables.

◆ Breaker Compartment

Tracks are set up on both sides of the compartment for handcart 5 to move and slide from the separated setting and examination placement to the functioning placement inside the closet. The dividing 3 (shutoff) of the static call box 16 is set up behind the back wall surface of the handcart area. When the handcart relocates from the separated placement examination placement to the functioning setting, the flaps on the upper and lower static contact boxes are linked with the handcart and automatically open. When relocating the contrary instructions, the flaps instantly close up until the handcart go back to a particular placement and completely covers the static call box, forming reliable isolation. Due to the separate operation of the upper and reduced valves, during maintenance, the shutoff on the online side can be locked to guarantee that maintenance workers do not touch the real-time body. When the circuit breaker area door is closed, the handcart can likewise be run.

With the monitoring home window of the middle door, the placement of the handcart being taken care of and closed in the area can be observed, and the power storage space condition can be presented.

◆ Busbar Compartment

The major busbar 18 is a solitary unit spliced and connected to every other, repaired by the major busbar 20 and the static contact box. The primary busbar and attaching busbar are copper bars with rectangle-shaped cross-sections, utilized for high currents. When composite, dual busbars are used to assemble them. The branch busbar is connected to the static get in touch with box 16 and the main busbar through screws and does not require any other assistance. For unique demands, the busbar can be covered with heat diminish tubes, insulation sleeves with connecting screws, and finish caps. Adjacent cabinet busbars are repaired with sleeve 19, so that the air buffer retained between the connecting busbars can prevent melting in case of internal fault arcs. Sleeve 19 can effectively limit accidents to this cupboard and not infect various other closets.

Overall dimensions

Installation of switchgear

Schematic diagram of switchgear structure

◆ The adhering to representation reveals the architectural elements of the switchgear. All steel modular assembly framework, the cupboard body is made of imported light weight aluminum zinc layered plate with strong anti-corrosion ability, without surface area treatment. It is processed by CNC high-precision tools and takes on sophisticated multiple folding procedure. The link is connected with rivet nuts and high-strength bolts, with high accuracy, lightweight, and great stamina.

◆ The switchgear can be equipped with our firm's VS1 collection, VD4 collection, ZN65 collection and other vacuum cleaner breaker, with broad applicability and strong interchangeability. The handcart is equipped with a working setting, a testing position, and positioning and display screen gadgets at each position, making certain security and integrity.

◆ The cable area can suit approximately 9 single core cords, and the tools is equipped with reliable mechanical and electrical interlocking devices, fully satisfying the "5 prevention" demands. Each area is geared up with stress alleviation networks to ensure personal safety and security throughout procedure.