Shenhai ntsa̲ explosiones
Ar klase antideflagrante:
Ndui mfats'i ngatho ja ya explosiones:
Ar ndui 'ba̲ts'i antideflagrante implica utilizando 'nar carcasa ntsa̲ ar explosiones da resista ya ndu nzafi explosiva jar ár interior, Nu'bu da ár mezcla ja yá 'muise mbo bí extienda bí área ar circundante. Ga̲tho ya espacios antideflagrantes ya inferiores ja ar espacio ntsuni experimental máximo pa ar gas combustible jar nt'ot'e (Ja ya ntsa̲ estándar, ar espacio mäs dätä entre yoho ya xeni 'nar articulación, nä'ä hingi encenderá 'nar mezcla explosiva externa nu'bu̲ bí enciende ar concentración xí hei ar encender 'nar mezcla explosiva mbo jar carcasa). Nu'bu̲ ar gas combustible ku̲t'i ja ar carcasa ne ar enciende, Provocar 'nar explosión, Ya llamas explosivas gi 'bu̲hu̲ contenidas mbo jar carcasa, incapaz ar encender mezclas explosivas externas, garantizando nja'bu̲ ar ntsuni ar entorno circundante.
Ventajas:
Ininflamable enclosures are widely applied with a relatively simple structural design.
Desventajas:
They are bulky and have specific requirements for cables, articulaciones, Conductos, linings, and sleeves (the inner diameter of the rubber sealing ring within the sleeve should match the sleeve’s outer diameter and be secured with a compression nut; if steel pipe sleeves are used, they should be sealed with packing as prescribed; if a sleeve without a cable is used, the inlet must be sealed according to standard requirements). It is not permitted to open the casing while energized in hazardous environments; opening the casing requires specialized tools, and incorrect installation and maintenance can lead to dangerous situations. Flameproof enclosures are not permitted in Zone 0 and are typically used for motors, iluminación, etc.
Ar klase intrínsecamente pädi xi hño:
Ndui mfats'i ngatho ja ya explosiones:
Intrinsically safe, o “Ntsuni intrínseca,” refers to a principle of explosion protection where the energy of electrical sparks or thermal effects produced within a device or its exposed connecting wires is limited to a level that cannot ignite. This means that under normal operation or specified fault conditions, no designated explosivo mixture can be ignited. Main protective measures include limiting the circuit’s voltage and current and the circuit’s capacitance and inductance, divided into Type ia (allowing two fault points) and Type ib (allowing one fault point).
Ventajas:
Devices do not require special cables, making it safer for operators to handle maintenance and repairs, and covers may be opened while powered.
Desventajas:
It is not suitable for high-power devices and is generally used for low-power devices in measurement, control, and communication. ‘Ib’ type can operate in Zone 0; ‘Ib’ type can operate in Zone 1.
Positive Pressure Types:
Ndui mfats'i ngatho ja ya explosiones:
The principle of Presión positiva types explosion protection involves introducing fresh air or inert gas at a certain pressure into the enclosure, preventing combustible gases from entering and, Bí nja'bu̲, preventing ignition sources from contacting explosive gases, thereby preventing explosions. Key measures for pressurized electrical equipment include maintaining a protective gas (fresh air or inert gas) pressure within the casing greater than 50 Pascals. Requirements for pressurized electrical equipment include: Ar carcasa, pipelines, and their connections must withstand 1.5 times the maximum positive pressure with all exhaust ports closed under normal working conditions as specified by the manufacturer, with a minimum pressure of 200Pa. The protective air intake must be located in a non-hazardous area, free of corrosive media; exhaust must be located in a non-hazardous area, or spark and particle isolation baffles must be considered; devices that monitor air pressure and flow must be set according to product nameplate or manual specifications.
Ventajas:
Can be used when other methods are not applicable.
Desventajas:
Installation and maintenance are complex and costly; if instruments encounter inflamable Mezclas, other protective measures must be taken; no energized cover work is permitted. Typically used for large motors, Transformadores, and high-voltage switches. Permitted usage range: Instruments with automatic power-on functions can be used in Zone 1; instruments with operating acoustic-optic alarms can be used in Zone 2.
'Bu̲'bya, our company’s explosion-proof products mainly include flameproof, Intrínsecamente pädi xi hño, and pressurized types. Regardless of the method, the fundamental principle is to prevent electrical equipment from becoming an ignition source. The most basic method to prevent explosions is to ensure that the three elements of combustion—fuel, oxidizer, and ignition source—do not coexist in time and space. After considering various working conditions, the most suitable type of explosion-proof electrical product should be selected, taking into account cost and ease of maintenance, to minimize the risk of on-site hazards.