In industrial production, once electrical equipment experiences an explosion accident or issue, it can cause significant harm not only to the normal operation and safety of industrial production but also pose great threats to the life and property of staff.
The continuous advancement of technology promotes the constant updating and improvement of detection equipment and techniques. By combining equipment usage and the working environment, the comprehensive application of flameproof electrical equipment in installation, maintenance, and other technical means in the electrical flameproof safety detection process effectively enhances the accuracy and timeliness of detection.
According to national regulations, flameproof electrical equipment must have standardized flameproof markings, including "EX" mark, flameproof type, flameproof level, and temperature group. During the detection process, these elements should be checked as key points to see if they meet the relevant regulations.
If the installation process does not strictly follow the installation standards, it can pose significant safety hazards to the electrical equipment. Therefore, in detecting the flameproof safety of electrical equipment, the installation condition can be used for judgment. Mainly check whether the equipment casing has cracks or damage: whether the anti-corrosion layer is intact, and the sealing condition of the junction box cover. During installation, check if the ventilation, exhaust system, and inlet and outlet installation positions of the flameproof electrical equipment meet the flameproof requirements.
Flameproof electrical equipment has complex wiring, consisting of multiple circuits. If the line connections are not reasonable, it can cause a short circuit, posing certain safety risks to the electrical equipment. Line detection should not be overlooked during inspection. Focus on whether the extra incoming lines of the electrical equipment are well sealed during detection. Verify if the sealed or isolated devices in the electrical circuit meet the requirements and whether the design, line routing, and elevation meet the equipment's usage standards.
Good grounding protection can effectively prevent electrical explosions. Generally, grounding methods include operational grounding, static grounding, protective grounding, and other methods, sometimes combining several grounding methods together. During inspection, follow the specific grounding methods, thoroughly check to ensure grounding safety, firmness, and that the ground resistance value is within the standard detection range.
Based on the difference in the completion levels of national grid facilities, to prevent flameproof electrical equipment from being damaged due to excessively high voltage, products need to undergo voltage withstand testing before leaving the factory. Generally, applying a voltage of 1000+2V over the designed voltage V ensures the product can operate normally without being burned out.
In addition to static detection of flameproof electrical equipment, dynamic detection while the equipment is in operation is also required. Typically, close observation and detection of the equipment's temperature are conducted during operation to prevent abnormal temperature rise and hot spots. If the temperature is too high, measures should be taken promptly to control it, especially to avoid arcing and sparking by combining instrument measurements for thorough detection.
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