Modular Shielded Enclosure for EMI Test Chambers

Product Specifications

Technical details and manufacturing context for Modular Shielded Enclosure

Definition

The Modular Shielded Enclosure is a key component of an Industrial Electromagnetic Interference (EMI) Shielding Test Chamber System. It provides a controlled, electromagnetically isolated environment for testing electronic and electrical equipment. Its primary role is to contain EMI emissions from the device under test (DUT) and shield the DUT from external electromagnetic fields, ensuring accurate and repeatable compliance testing. The enclosure is constructed from galvanized steel and copper alloy panels, with EMI shielding gaskets (e.g., beryllium copper, conductive elastomers) at seams and penetrations to maintain shielding integrity. It is available in custom sizes, with standard internal dimensions of 1000×1000×2000 mm (W×D×H). The shielding effectiveness ranges from 60 to 100 dB over a frequency range of 10 kHz to 18 GHz, tested according to IEC 61000-4-21. Leakage flux density is ≤0.5 µT at 1 m from the enclosure. Operating temperature ranges from -40 to 85 °C (non-condensing), and humidity from 10 to 90% RH (non-condensing). The enclosure offers ingress protection ratings of IP54 to IP65 per IEC 60529. Panel material is zinc-coated steel (SECC/SPCC) per JIS G3313, with panel thickness of 1.5–2.0 mm for structural rigidity. Weight ranges from 500 to 800 kg depending on size, and floor load capacity is 1000 kg/m² (uniformly distributed). Power rating is 230 V AC ±10%, single phase, 50/60 Hz, per IEC 60038. The enclosure operates on the Faraday cage principle, creating a continuous conductive barrier that reflects and absorbs electromagnetic waves. Specialized gaskets and filters seal all seams and penetrations to maintain shielding effectiveness across the specified frequency range. For selection, verify model-specific dimensions, shielding performance, and compliance with applicable standards with the legal manufacturer or supplier. Regular maintenance includes inspecting gaskets and seals for wear or damage, and checking door closures and filter integrity. Failure to maintain shielding integrity may result in inaccurate test results or non-compliance with regulatory limits.

Working Principle

The enclosure functions by creating a continuous, conductive barrier (Faraday cage principle) using shielded panels, doors, and interfaces. Electromagnetic waves are reflected and absorbed by the conductive materials, and any seams or penetrations are sealed with specialized gaskets and filters to maintain shielding integrity across a wide frequency range.

Common Materials

Galvanized Steel, Copper Alloy, EMI Shielding Gaskets (e.g., beryllium copper, conductive elastomers)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Internal Dimensions (W×D×H)	1000×1000×2000 mm	Custom sizes available
Shielding Effectiveness	60–100 dB	At 10 kHz–18 GHzIEC 61000-4-21
Frequency Range	10k–18G Hz	Test frequency range
Leakage Flux Density	≤0.5 µT	At 1 m from enclosure
Operating Temperature	-40–85 °C	Non-condensing
Humidity Range	10–90 % RH	Non-condensing
Ingress Protection	IP54–IP65	Dust and water resistanceIEC 60529
Material	SECC/SPCC	Zinc-coated steelJIS G3313
Panel Thickness	1.5–2.0 mm	Structural rigidity
Weight	500–800 kg	Depends on size
Load Capacity (Floor)	1000 kg/m²	Uniformly distributed
Power Rating	230 ±10% V AC	Single phase, 50/60 HzIEC 60038

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Shielded Wall Panel Part
Forms the primary conductive barrier of the enclosure.

Material: Galvanized steel with welded seams
Shielded Access Door
Provides entry while maintaining shielding continuity via finger-stock or compression gaskets.

Material: Galvanized steel, beryllium copper gasket
Waveguide Ventilation Panel
Allows air flow while attenuating electromagnetic waves above a cutoff frequency.

Material: Aluminum honeycomb
EMI Filter Panel
Filters conducted interference on power, signal, and data lines entering/exiting the enclosure.

Material: Steel enclosure, internal filter components

Manufacturers of Modular Shielded Enclosure

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Frequently Asked Questions

What is the shielding effectiveness of the Modular Shielded Enclosure?

The shielding effectiveness is 60–100 dB over a frequency range of 10 kHz to 18 GHz, as tested per IEC 61000-4-21. Actual performance may vary with configuration and installation; verify with the manufacturer.

What are the standard internal dimensions?

Standard internal dimensions are 1000×1000×2000 mm (W×D×H), but custom sizes are available. Confirm the exact dimensions for your application with the supplier.

What ingress protection ratings does the enclosure offer?

The enclosure offers IP54 to IP65 ratings per IEC 60529, providing dust and water resistance. The specific rating depends on the configuration and options selected.

How should the enclosure be maintained to ensure shielding integrity?

Regularly inspect EMI shielding gaskets and seals for wear or damage, ensure door closures are tight, and check filters and penetrations. Any degradation can compromise shielding effectiveness and test accuracy.

Data Basis

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Preliminary Technical Classification

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pressure:	Atmospheric to 1.5 bar
other spec:	EMI shielding effectiveness: 60-100 dB (depending on frequency and configuration)
temperature:	-40°C to +85°C

Modular Shielded Enclosure

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards