7.2KV 1250A Commercial Switchgear Power Distribution Cabinet

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+40 ℃, minimum temperature -15 ℃;

◆Relative humidity: Daily average relative humidity: ≤ 95%, daily average water vapor pressure does not exceed 2.2KPa; Monthly average relative humidity ≤ 90%; The monthly average water vapor pressure does not exceed 1.8KPa; Altitude: ≤ 1000m;

◆Earthquake intensity: not exceeding level 8;

◆The surrounding air should not be significantly polluted by corrosive or combustible gases, water vapor, etc;

◆No places with severe vibration;

◆When using beyond the normal conditions specified in GB3906, the user and our company shall negotiate

Functions and features of 7.2KV 1250A Commercial Switchgear Power Distribution Cabinet

The 7.2KV 1250A  Commercial Switchgear Power Distribution Cabinet is crafted in accordance with GB3906-91 standards for armored metal-enclosed switchgear. It consists of two main parts: a cabinet and a central pull-out portion (also known as a handcart). The cabinet is divided into four distinct compartments. The enclosure protection level is IP4X, while the doors of each small compartment and the circuit breaker room offer IP2X protection when opened. 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, or wall-mounted installations, which enhances safety, flexibility, and space efficiency.

Main technical parameters of 7.2KV 1250A Commercial Switchgear Power Distribution Cabinet

Main technical parameters of vacuum switchgear

When utilizing a circuit breaker to regulate a 3-10KV motor, the addition of a metal zinc oxide lightning arrester is necessary if the starting current falls below 600A. The specific requirements for this arrangement are determined through discussion between the user and our company, taking into account the capacitor bank's rated current, which should not surpass 80% of the circuit breaker's rated current.

Technical parameters of operating mechanism

The 7.2KV 1250A Commercial Switchgear Power Distribution Cabinet is made according to the armored metal confined switchgear in GB3906-91. The whole is made up of 2 mainparts: a closet and a main with drawable spare component (i.e. a handcart) (see Number 1). The cabinet is separated right into 4 different compartments, with an unit defense degree of IP4X. When the doors of each area and breaker area are opened, the protection level is IP2X. Equipped with overhanging inbound and outgoing lines, wire inbound and outgoing lines, and other useful plans, organized and incorporated to form a full collection of power circulation system tools. This switchgear can be mounted, debugged, and maintained from the front, so it can be back-to-back, organized in a dual setup, and set up versus the wall surface, enhancing the security, flexibility, and reducing the footprint of the switchgear.

◆ Shell and others

The major frame of the switchgear is made from light weight aluminum zinc slim steel plate, processed by CNC equipment tool, and adopts numerous folding procedure, which not only has the advantages of high precision, strong deterioration resistance and oxidation resistance, however additionally makes the cabinet lighter in weight, higher in mechanical stamina, and more cosmetically pleasing in appearance contrasted to other similar tools closets because of using numerous folding procedure. The cupboard adopts an assembled framework, connected by rivet nuts and high-strength screws, which reduces the processing cycle, improves the universality of components, occupies much less space, and is convenient for organizing manufacturing.

◆ Handcarf

The handcart framework is put together from slim steel plates refined by CNC machine devices. The handcart and cabinet are insulated and coordinated, and the interlocking system is risk-free, trustworthy, and versatile. According to their usage, handcart can be split right into circuit breaker handcart, voltage transformer handcart, metering handcart, seclusion handcart, and various other sorts of handcart. According to module and block kind variants, handcart of the same spec can be freely traded 100%. The handcart has a disconnection setting, a testing placement, and a working placement inside the closet. Each setting is furnished with a placing device to make certain reliable. interlocking. The procedure has to be performed according to the interlocking protection measures operation procedure. All handcart makes use of nuts and screws to relocate and leave, and its procedure is light and adaptable, appropriate for at work employees to run. When the handcart demands to be moved far from the cupboard, a devoted transfer car can be easily pulled out for various inspections and maintenance, And it takes on a mid placed design, with a tiny volume for examination, upkeep, and benefit.

◆ Compartment

The major electric elements of the switchgear have independent compartments, specifically: circuit breaker handcart room, busbar area, cable space, relay instrument space. The security degree in between each compartment gets to lP2x; With the exception of the relay, all other three styles have their own stress relief networks. Due to the use of a central format, the cable room area is considerably increased, enabling the devices to link several cables.

◆ Breaker Area

Tracks are installed on both sides of the compartment for handcart 5 to move and move from the disconnected position and test placement to the functioning setting inside the cabinet. The partition 3 (shutoff) of the static call box 16 is mounted behind the back wall surface of the handcart compartment. When the handcart moves from the detached setting test placement to the working placement, the flaps on the top and lower static get in touch with boxes are related to the handcart and instantly open. When moving in the contrary instructions, the flaps immediately close until the handcart go back to a certain placement and totally covers the fixed call box, creating reliable isolation. Because of the separate procedure of the upper and lower shutoffs, throughout maintenance, the valve on the live side can be locked to make sure that maintenance personnel do not touch the real-time body. When the circuit breaker area door is shut, the handcart can also be run.

Via the observation home window of the center door, the placement of the handcart being thrown away and enclosed the area can be observed, and the power storage status can be shown.

◆ Busbar Area

The major busbar 18 is a single unit spliced and connected per other, dealt with by the main busbar 20 and the fixed get in touch with box. The primary busbar and linking busbar are copper bars with rectangular cross-sections, utilized for high currents. When composite, dual busbars are utilized to construct them. The branch busbar is attached to the static call box 16 and the main busbar with bolts and does not need any other support. For special needs, the busbar can be covered with warm reduce tubing, insulation sleeves with linking bolts, and finish caps. Nearby cupboard busbars are fixed with sleeve 19, to ensure that the air buffer maintained between the linking busbars can prevent melting in the event of interior fault arcs. Sleeve 19 can successfully restrict mishaps to this closet and not infect various other cupboards.

Overall dimensions

Installation of switchgear

Schematic diagram of switchgear structure

◆ The following representation shows the structural parts of the switchgear. All steel modular setting up framework, the cabinet body is made of imported light weight aluminum zinc covered plate with solid anti-corrosion capacity, without surface area therapy. It is processed by CNC high-precision tools and takes on advanced several folding procedure. The connection is connected with rivet nuts and high-strength screws, with high accuracy, lightweight, and great stamina.

◆ The switchgear can be outfitted with our business's VS1 collection, VD4 series, ZN65 collection and various other vacuum cleaner breaker, with broad applicability and solid interchangeability. The handcart is furnished with a functioning position, a testing position, and placing and display screen devices at each placement, making sure safety and dependability.

◆ The cord area can accommodate up to 9 single core cable televisions, and the equipment is outfitted with reliable mechanical and electric interlocking devices, completely fulfilling the "5 avoidance" needs. Each room is furnished with stress relief channels to ensure personal safety throughout operation.