स्फोट-पुरावा विद्युत उपकरणे कशी निवडावी

1. इलेक्ट्रिकल उपकरणे निवडण्यासाठी ते कार्यरत असलेल्या स्फोटक वातावरणाची सर्वसमावेशक समजून घेणे आवश्यक आहे, पर्यावरणीय पातळीसह, क्षेत्र वर्गीकरण, आणि सध्याच्या स्फोटक मिश्रणाची वैशिष्ट्ये.

2. सुरक्षित क्षेत्रांसाठी मानक स्थापना निकष पूर्ण करण्यापलीकडे, electrical installations in स्फोटक environments should adhere to these guidelines:

1. Preferably install devices in non-hazardous zones, or in areas with minimal danger if unavoidable.

2. Follow specified technical documentation for installation or replacement, ensuring equipment specifications align with the original devices.

3. The choice of electrical equipment should be influenced by its operational environment, प्रकार, and usage conditions. The selection of explosion-proof equipment grades and groups must align with the level of explosive mixtures in that setting. If multiple explosive substances exist, base the choice on the mixed explosive mixture’s grade and composition. In cases where testing isn’t feasible, opt for the higher risk grade and category. उदाहरणार्थ, झोन 0 requires only ia level intrinsically safe equipment; झोन 1 allows for a variety of types including ज्वालारोधक and intrinsically safe; झोन 2 permits spark-proof equipment or those approved for Zone 1. Increased safety type equipment for Zone 1 is limited to.

4. Junction or connection boxes that don’t generate sparks, चाप, or dangerous temperatures under normal conditions.
High-efficiency, thermally protected वाढलेली सुरक्षा asynchronous motors.
Single plug-in increased safety fluorescent lights.
Electrical apparatuses used in explosive environments must comply with current national standards and possess an स्फोट-पुरावा प्रमाणपत्र from relevant authorities.

5. Electrical equipment in such environments should mitigate risks from chemical, mechanical, thermal, and biological factors, conforming to environmental requirements like तापमान, आर्द्रता, altitude, and seismic activity. Its structure should sustain explosion-proof integrity under prescribed operational conditions.

6. स्फोटक वातावरणात, the use of portable and movable devices, as well as socket installations, should be minimized.

7. When choosing specialized explosion-proof equipment, consider its unique installation and usage conditions, marked with “s”.

8. Electrical equipment used temporarily, such as in R&D or small-scale testing, may operate without explosion-proof specifications under expert supervision, provided one of the following conditions is met:

1. Ensuring no explosive environment is formed.

2. Cutting off power in explosive settings to prevent ignition sources effectively.

3. Implementing safeguards against burning or explosive hazards for personnel and surroundings.

अशा घटनांमध्ये, a documented evaluation from individuals knowledgeable about the adopted measures, मानके, and material evaluation methods for hazardous locations is essential.

9. To avert hazardous spark generation, protective systems should restrict fault ग्राउंडिंग currents in size and duration. In explosive settings, the TN-S system is preferred; if using the TT system, install a residual current device; for IT systems, equipotential bonding and insulation monitoring are imperative.