11KV 630A Medium Voltage Indoor 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+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 11KV 630A Medium Voltage Indoor Electrical Switchgear

The 11KV 630A Medium Voltage Indoor Electrical Switchgear is crafted in accordance with the armored metal-enclosed switchgear standards outlined in GB3906-91. It consists of two primary components: the cabinet and the central pull-out portion (also known as the handcart). The cabinet is segmented 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. After arrangement and combination, it forms a comprehensive power distribution system device. This 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 11KV 630A Medium Voltage Indoor Electrical Switchgear

Main technical parameters of 11KV 630A Medium Voltage Indoor Electrical Switchgear

If the 3-10KV motor is controlled by a circuit breaker and the starting current is under 600A, a metal zinc oxide lightning arrester should be installed. The user and our company will discuss the specific conditions. When the circuit breaker is used to disconnect the capacitor bank, the rated current of the capacitor should not surpass 80% of the circuit breaker's rated current.

Technical parameters of operating mechanism

The 11KV 630A Medium Voltage Indoor Electrical Switchgear is made according to the armored steel confined switchgear in GB3906-91. The entire is composed of 2 mainparts: a cupboard and a main with drawable spare component (i.e. a handcart) (see Number 1). The cupboard is divided into 4 separate areas, with an enclosure protection degree of IP4X. When the doors of each area and breaker room are opened, the security level is IP2X. Furnished with above inbound and outbound lines, cable television incoming and outward bound lines, and various other functional systems, organized and incorporated to form a total set of power circulation system devices. This switchgear can be mounted, debugged, and preserved from the front, so it can be back-to-back, organized in a double setup, and mounted against the wall, boosting the safety and security, versatility, and decreasing the impact of the switchgear.

◆ Covering and others

The main structure of the switchgear is made from light weight aluminum zinc slim steel plate, refined by CNC machine device, and adopts multiple folding procedure, which not just has the advantages of high precision, strong corrosion resistance and oxidation resistance, yet likewise makes the closet lighter in weight, greater in mechanical stamina, and a lot more visually pleasing in appearance compared to other similar tools cabinets because of the use of numerous folding procedure. The cabinet adopts an assembled framework, linked by rivet nuts and high-strength bolts, which shortens the processing cycle, improves the universality of components, inhabits much less room, and is convenient for arranging manufacturing.

◆ Handcarf

The handcart framework is assembled from thin steel plates refined by CNC device devices. The handcart and cabinet are shielded and worked with, and the interlacing mechanism is safe, trustworthy, and versatile. According to their usage, handcart can be separated into circuit breaker handcart, voltage transformer handcart, metering handcart, seclusion handcart, and various other sorts of handcart. According to component and block type variants, handcart of the very same spec can be easily traded 100%. The handcart has an interference position, a testing setting, and a functioning placement inside the cabinet. Each setting is geared up with a placing gadget to guarantee trusted. interlocking. The procedure must be performed according to the interlacing security procedures operation procedure. All handcart utilizes nuts and screws to move and leave, and its procedure is light and adaptable, suitable for at work workers to operate. When the handcart needs to be relocated far from the cupboard, a dedicated transfer lorry can be quickly pulled out for various assessments and upkeep, And it embraces a mid placed layout, with a tiny volume for inspection, upkeep, and ease.

◆ Area

The primary electric components of the switchgear have independent compartments, specifically: circuit breaker handcart area, busbar room, cable room, relay instrument room. The protection level in between each compartment reaches lP2x; Besides the relay, all various other three layouts have their own pressure relief channels. Due to using a main layout, the cable area is significantly increased, permitting the equipment to connect several cords.

◆ Breaker Area

Tracks are set up on both sides of the area for handcart 5 to move and move from the separated position and test position to the working setting inside the cabinet. The dividers 3 (shutoff) of the static contact box 16 is mounted behind the back wall of the handcart compartment. When the handcart relocates from the disconnected placement test position to the functioning position, the flaps on the top and lower static call boxes are linked with the handcart and automatically open. When moving in the contrary instructions, the flaps automatically close till the handcart returns to a specific setting and totally covers the static contact box, forming effective seclusion. Due to the separate operation of the top and lower shutoffs, during upkeep, the shutoff on the live side can be secured to make sure that maintenance workers do not touch the online body. When the breaker room door is closed, the handcart can likewise be operated.

Through the observation window of the middle door, the position of the handcart being dealt with and closed in the area can be observed, and the energy storage standing can be presented.

◆ Busbar Compartment

The main busbar 18 is a solitary device mated and connected to every other, taken care of by the main busbar 20 and the static get in touch with box. The main busbar and connecting busbar are copper bars with rectangle-shaped cross-sections, utilized for high currents. When composite, dual busbars are utilized to construct them. The branch busbar is linked to the static contact box 16 and the main busbar via bolts and does not call for any other support. For special requirements, the busbar can be covered with warm diminish tubing, insulation sleeves with connecting bolts, and end caps. Nearby cupboard busbars are repaired with sleeve 19, so that the air barrier maintained in between the connecting busbars can avoid melting in the event of inner mistake arcs. Sleeve 19 can effectively limit accidents to this cabinet and not spread to other cabinets.

Overall dimensions

Installation of switchgear

Schematic diagram of switchgear structure

◆ The following representation shows the structural components of the switchgear. All steel modular assembly structure, the cupboard body is made from imported aluminum zinc layered plate with solid anti-corrosion capability, without surface treatment. It is refined by CNC high-precision tools and adopts advanced numerous folding process. The connection is connected with rivet nuts and high-strength screws, with high precision, light weight, and excellent stamina.

◆ The switchgear can be outfitted with our firm's VS1 series, VD4 series, ZN65 series and other vacuum breaker, with broad applicability and strong interchangeability. The handcart is outfitted with a working position, a screening placement, and positioning and display tools at each placement, ensuring safety and integrity.

◆ The cable area can accommodate as much as 9 single core cable televisions, and the devices is outfitted with trustworthy mechanical and electrical interlocking devices, fully satisfying the "five avoidance" requirements. Each space is outfitted with pressure alleviation networks to ensure personal safety during procedure.