product description
The explosion-proof fire-fighting broadcast/alarm loudspeaker has reasonable structure design and beautiful appearance, which can effectively resist the influence of dust pollution and humid air. This product complies with GB3836.1-2000 "General Requirements for Explosion-Proof Electrical Equipment for Explosive Environments" and GB3836.2-2000 "Explosion-proof Electrical Equipment for Explosive Environments Explosion-proof Type "d"" standards, dust explosion-proof GB12467.1-2000 Flammability Electrical equipment for dusty environments Part 1: Electrical equipment protected by enclosures and limited surface temperature, enclosure protection grade IP65, GB/T 14048.1 general requirements for low-voltage switchgear and control equipment.
The explosion-proof grade reaches ExdⅡCT6/DIP A21 TA, T6, suitable for petrochemical industry, oil depot, zone 1, zone 2 and dust inflammable and explosive places, manual auxiliary alarm for fire in zone 21 and zone 22, and has been inspected by the inspection unit designated by the state qualified. And obtained an explosion-proof certificate.
The main technical parameters
Explosion-proof mark: ExdⅡCT6/DIP A21 TA, T6 IP66
Humidity range: less than 95%
Atmospheric pressure: 80～110KPa 、
Audio voltage: 70V- 120V
Power: 3-60W
Alarm voltage: DC24V Current: 500mA
Sound: 120db
Frequency response: 100HZ—10KHZ
Ambient temperature: ±40
Dimensions: φ360×H350
installation method
1. Installation method: cable and steel pipe wiring. According to the site situation, M6 expansion screws or M6 screws are used to fix the explosion-proof enclosure upwards on the ceiling or tank, pipe rack, and connect the rubber-plastic cable with the outer diameter of φ6-8mm. The explosion-proof inlet of the cable is M22X1.5 The thread can be connected with the galvanized protective pipeline BNG15X700 explosion-proof flexible pipe, or it can be locked with an explosion-proof sealing nut.
2. The cable is connected to the controller with a two-core rubber cable with an outer diameter of φ8 mm. The cross-sectional area of the core wire of the "15AB type with four cores" is determined by the number of bus speakers. The cable inlet is M22×1.5 sealed with fireproof cap and rubber ring to compress the cable.
Instructions
1. Wiring: Open the explosion-proof cavity and introduce the cable through the fireproof cap, flat gasket, rubber ring, and wire inlet. Connect the cable to the terminal according to the diagram, connect the internal and external grounding wires, and cover the upper cover.
2. Wiring requirements: The insulation resistance between the wires and between the wires and the ground is required to be greater than 10MΩ, and the bus loop resistance is less than 20Ω.
3. Opening and debugging: After ensuring that the line connection is correct, you can power on the debugging. After the speaker is powered on, the sound will be loud and no noise when it is normal. The 15AB type will automatically switch to the alarm when sending DC24V, and it will automatically switch to the broadcast state when the 24V is stopped.
Precautions
1. It is strictly prohibited to conduct live disassembly in flammable and explosive places.
2. Do not damage the explosion-proof surface during installation and keep it clean. The tightening screws of the explosion-proof surface should be evenly tightened. Be careful not to include wires or other foreign objects on the explosion-proof surface.
3. For long-term use, regularly check whether the performance is intact. If it fails or is damaged, it should be repaired by professionals in time.
4. For long-term use, clean it regularly and wipe it with a damp cloth to prevent static electricity.
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