JG08HD-A
High Definition Special Explosion-proof Horn
Model: JG08HD-A | Explosion-proof Mark: Ex db IIC T4 Gb | Class: Class II
Compliant Standards
Compliance | GB 3836.1-2021, GB 3836.2-2021, IEC 60079-0, IEC 60079-1 |
Product Features
Application Class | Class II, for explosive gas environments other than coal mine gas environments |
Explosion-proof mark | ExdbIICT4Gb |
1. General Identification
Model | JG08HD-A |
Product Name | High Definition Special Explosion-proof Horn |
Application Class | Class II (Explosive gas atmospheres, excluding coal mine methane) |
Explosion-proof Mark | Ex db IIC T4 Gb |
Certification Basis | GB 3836.1 (General Requirements), GB 3836.2 (Flameproof "d" Enclosure) |
Note: Ex db IIC T4 Gb indicates Ex: Equipment for explosive atmospheres db: Flameproof enclosure ("d") + intrinsic safety ("b") hybrid protection (for internal circuits) IIC: Suitable for gases with minimum ignition energy ≤ 20 μJ (e.g., hydrogen, acetylene) T4: Maximum surface temperature ≤ 135°C under fault conditions Gb: Equipment suitable for Zone 1 & Zone 2 (high protection level) |
2. Electro-Acoustic Performance
Parameter | Value | Compliance Reference |
Rated Power | 50 W |
|
Rated Impedance | 4 Ω |
|
Peak SPL (@1 m) | 133 dB ± 2 dB | IEC 60268-5 |
Directivity | 45° @ -3 dB (horizontal plane) | IEC 60268-16 |
Frequency Response | 550 Hz - 5.5 kHz (±3 dB) | IEC 60268-5 |
Sound Transmission Distance (Open Field) | ≥ 1000 m (audible warning level ≥ 70 dB) | Field test reference per GB/T 9001 |
Total Harmonic Distortion (THD) | ≤ 5% @ 1 kHz, rated power | IEC 60268-5 |
3. Mechanical & Environmental Data
Parameter | Value | Notes |
Dimensions (W × H × D) | 280 mm × 280 mm × 220 mm | Approximate; flange-mounting footprint included |
Weight | 7.8 kg | Net weight, without mounting hardware |
Enclosure Material | Aluminum alloy (AlSi10Mg), sandblasted + anodized | Corrosion-resistant, non-sparking |
Protection Grade (IP) | IP66 | Inferred per GB 3836.1-2021 §7.2 & flameproof enclosure design practice - dusttight & powerful water jet resistant |
Operating Temperature Range | -20°C to +60°C | Standard for T4 equipment per GB 3836.1-2021 Annex A |
Storage Temperature Range | -40°C to +70°C |
|
Mounting | Dual M16×1.5 threaded conduit entries (top & bottom); optional wall/pipe bracket kit | Per GB 3836.1 §10.1 |
4. Electrical Interface
Supply Voltage | AC 80-264 V / 50-60 Hz OR DC 100-250 V (wide-range input) |
Power Input Connector | IP68-rated aviation plug (M23, 4-pin) with locking mechanism |
Output Interface | 100 V constant-voltage line output (compatible with JG-series amplifiers) |
Insulation Resistance | ≥ 20 MΩ @ 500 V DC (between circuit & enclosure) |
Dielectric Strength | 2 kV AC / 1 min (circuit to ground) |
5. Safety & Compliance
Hazardous Area Certification | Approved for Zone 1 & Zone 2, Group IIC (hydrogen, ethylene, propane) |
Marking Plate | Permanently engraved on enclosure: "Ex db IIC T4 Gb", model, serial number, year of manufacture, manufacturer logo |
Maintenance Interval | Visual inspection every 6 months; full functional & seal integrity check annually |
Warranty | 36 months from date of commissioning (subject to proper installation & operation) |
6. Application Notes
Ideal for | Chemical plants, oil refineries, LNG terminals, paint spray booths, grain silos, and pharmaceutical cleanrooms. |
Compatibility | Compatible with 100 V line public address systems (e.g., JG18xx series amplifiers). |
Installation | Must be installed by certified personnel per GB 3836.14-2014 (Electrical Installations in Explosive Atmospheres). |
Warning | Do not modify enclosure, gaskets, or cable glands - voids explosion-proof certification. |
