Assembled Shielded Room
The shield room can be configured for both the ceiling and floor to bear the load simultaneously, thereby reducing the weight on the floor.
2. Technical Requirements
I. Basis:
"Method for Measuring the Shielding Effectiveness of High-Performance Shielding Rooms" GB/T 12190-2021
"General Technical Requirements for Screening Room Testing" GJB20219-94
3. "Engineering and Acceptance Standards for Shielded Room Construction" SJ31470-2002
4. "Code for Design of Electronic Computer Rooms" GB50174-93
5. "Computer Room Safety Requirements" GB9361-88
6. "Technical Requirements for Computer Room" GBGR 2887-2000
7. "Electromagnetic Shielding Technical Requirements and Measurement Methods for Handling Confidential Information" BMB3-1999
8. Standard for Design and Special Standards of Automatic Fire Alarm Systems - GB50116-98
9. Principles of relevant electromagnetic compatibility technology and current regulations on national security
II. Performance Specifications:
Section 3: Structural FormSheet steel assembled shielding room
Housing: Four wallsThe panels are constructed from double-layered unit modules made of δ=1.5mm thick galvanized steel sheets (decorative-free for indoor wall surfaces), while the floor and ceiling are made into shielding modules using single-layer δ=1.5mm thick galvanized steel sheets. After electrostatic powder coating, they are assembled with M8 bolts, nuts, washers, and conductive gaskets.
2. Electric Shielding DoorDoor opening size: 1900mm x 900mm; The shielded door employs a method of simultaneous tight contact between two rows of spring plates, the blade opening, and the copper plate of the door frame to ensure the shielding effectiveness meets the requirements.
3 .Ventilation waveguide windowThe ventilation system of the shielding room employs a dedicated waveguide window, with its insertion loss corresponding to the shielding room's equipment specifications. It consists of a bundle of many small waveguides, with the cross-sectional shape designed as hexagonal. Under the same insertion loss capability, the channel area of a hexagonal waveguide is greater than that of a square waveguide, thereby expanding the ventilation area and reducing the resistance to air exchange.
The ventilation of the shielding room is achieved through an exhaust fan via a cutoff waveguide window. Holes for installing the ventilation cutoff waveguide windows are pre-drilled at designated locations on the shielding shell. The waveguide windows are welded to the shell and a flanged decorative frame compatible with the exhaust fan is made. Decorative aluminum alloy louvers are used at the indoor air outlet.
4 Filters
The filter is composed of three sections of high-frequency filters connected in series. Each section is well-shielded, and adjacent sections are coupled using through-core capacitors to achieve good characteristics. The waveguide connector (mounted with a hollow screw) is designed according to the principle of waveguide filters, preventing the reduction in shielding effectiveness by drilling holes in the shielding room walls, and it effectively suppresses electromagnetic waves below 3CM. This filter is a two-wire system filter, and in principle, each pair of wiring should be connected to a filter, i.e., one for single-phase AC circuits. Filters are generally installed at the top and side walls of the shielding room. To isolate the coupling effect between the input and output ends of the filter, the output lines should be brought into the shielding room, while the filter should be placed outside. To ensure the filter's attenuation performance, there should be a reliable electrical contact between the filter housing and the shielding room's metallic wall. The filter must be installed in a dry and well-ventilated area.
Filter installation sequence
Pre-drill holes at the filter installation location in the shielding room.
(b) Thread the waveguide connector through the hole and into the interior, then securely fasten the nut to the shielded wall (copper mesh or steel plate) indoors.
(c) The outdoor power supply line is connected to the filter's wiring, and the indoor power supply is derived from the waveguide connector to connect the wiring. When wiring, the red wire corresponds to the phase wire, and the yellow wire corresponds to the neutral wire.
5. Grounding Device:Draw a 10 square grounding wire from the shielding room housing and connect it to the equipotential grounding rod.
6 Indoor Electrical Equipment:Distribution boxes, LED lighting fixtures, and multi-functional outlets must be selected strictly from renowned brands that comply with national standards to ensure stable operation of the shielding room and minimize malfunctions. The routing of electrical cables and the arrangement of switches and outlets are tailored to the customer's requirements.
Interior Decoration:Ceiling: Micro-perforated aluminum panel + Floor: Color coated steel + Gypsum board + Anti-static floor + Frame
