Implement explosion-proof preventive measures for electrical equipment
📅 2023-06-15
📄 General Technology
👁 0 views
👤 Hualongexplosion-proof
In industrial manufacturing, once an explosion event or problem occurs in electrical equipment, it not only causes significant damage to the normal use and management of industrial production but also poses a serious threat to the life safety of relevant personnel. By integrating equipment operating conditions and the working environment and implementing good explosion-proof measures for electrical equipment, various methods such as assembly and maintenance of explosion-proof electrical equipment can be flexibly applied in the explosion-proof testing service process, which can comprehensively improve the accuracy and timeliness of testing.Explosion-proof measures for electrical equipment: To ensure the excellent characteristics of electrical equipment, or to reduce or eliminate explosion incidents, and to achieve safe production and normal startup, in addition to improving the technical level of explosion-proof safety inspection for electrical equipment and solidly advancing inspection services, the most fundamental approach is to prevent problems before they occur and adopt appropriate preventive measures. It also requires mechanical operators to strengthen professional skills, master relevant non-destructive testing techniques and inspection methods, and work together with equipment maintenance and management personnel to maintain and inspect electrical equipment.Overall, the following preventive measures can be adopted: Cable routing. When explosive dust or vapor is heavier than air, the cable routing of electrical equipment should be carried out at height, or the distribution lines should be buried directly underground. During overhead routing, cable trays should be used to assist in line installation. When routing in cable trenches, the interior should be filled with sand, and some drainage systems should be set up based on actual conditions, such as pipes and. When gas or vapor is lighter than air, the routing of distribution lines should be carried out at low positions, or cable trench routing can be used.For distribution lines connecting to transmission lines in explosive hazardous environments, cables must not be interconnected with each other. Under abnormal circumstances, connections must be made naturally in the corresponding explosion-proof junction boxes or distribution boxes. When connecting cables to electrical equipment, it is advisable to use introduction devices that match the outer diameter of the cable. If the introduction device of the selected electrical equipment does not match the cable diameter, a transition connection method should be used, and the cable and transition wire must be naturally connected in the corresponding explosion-proof junction box. For connections of transmission lines or cables, bolts with tightening measures should be used for fixed connection, or socket connection, brazing, or arc welding should be adopted; winding connection is not allowed.CopperBunAluminumLine And Electricalequipment的LinkedWelding,ShouldShouldWithUpTrustedReliable的Copper—AluminumDuring渡ConnectorEtc.Measure。Circuit protection devices - based on the systematic principles of the electrical control system, it is generally best to select circuit breakers with excellent performance to prevent short circuits and overloads in distribution lines.。This is based on the principle that the rated voltage of the circuit breaker is higher than the rated voltage of the electrical equipment. When the line current is unstable and the equipment temperature is too high, the circuit breaker will automatically cut off the distribution line, preventing the occurrence of explosion incidents.。The main purpose of zoning for explosive hazardous areas is to select suitable explosion-proof equipment. In China, explosion-proof requirements are the same as IEC, and explosive dust hazardous sites are divided into three zones, namely 0 zone, 1 zone, and 2 zone: 0 zone; for dust sites, they are also divided into three zones, namely 20, 21, and 22 zones. Based on the characteristics of the zone, the explosion-proof structure and device selection of electrical equipment can be determined to ensure good explosion-proof effectiveness.Mastering electrical equipment explosion-proof knowledge and skills, standardizing operating procedures for electrical equipment, improving explosion-proof inspection service work, promptly identifying potential safety hazards in accidents, taking targeted preventive measures, and improving the safety and stability of machinery can reduce accident rates and frequency, avoiding personal injury and property loss.。safetyDetectionTechnologyModelspecificationInspectionaccording toCountryWithPay AttentionRegulations,Explosion-proof Electrical ApplianceequipmentShouldhavestandardizedIntelligent的explosion-proofStandardIndicate,containing“EX”StandardIndicate、explosion-proofVariousVarious、Explosion-proof Rating And Temperature ClassEtc.RelatedPay Attentioninformation。During the inspection process, these factors should first be checked as key points to verify whether they meet relevant regulations. Assembly inspection: If the installation does not strictly follow the installation specifications, it can also bring significant safety hazards to the electrical equipment. Therefore, when testing the explosion-proof safety status of electrical equipment, the installation and commissioning condition can be checked to make a judgment. Key checks include whether the equipment enclosure has cracks or damage: whether the anti-corrosion coating is complete, and the sealing condition of the junction box cover. During installation, whether the ventilation, exhaust system, and inlet/outlet installation methods of the electrical equipment meet explosion-proof requirements.Line inspection: The distribution lines of electrical equipment are complex, composed of multiple circuits internally. If the circuit connections are unreasonable, it will cause short-circuit faults and bring certain safety risks to the electrical equipment. During inspection, line inspection cannot be ignored. During inspection, key observation should be made on whether the unnecessary incoming lines of the electrical equipment are well sealed. Whether the sealing or isolation devices in the distribution lines meet the requirements, and whether the planning, line routing, and elevation meet the equipment usage specifications. Grounding inspection: A good grounding system can effectively avoid explosion incidents caused by electrical equipment.Generally, grounding methods include protective grounding, static grounding, lightning protection grounding, and many other forms. Some are comprehensive grounding devices combining several methods. During inspection, according to the specific grounding method, careful checks should be conducted to ensure the grounding device is safe and firm, and the grounding resistance is within the test standard range. Operation inspection: In addition to inspecting the electrical equipment in a static state, it should also be inspected under working conditions.Generally, during operation, close observation and inspection of system temperature should be carried out to avoid abnormal temperature and overheating points. Once the temperature is too high, effective measures should be taken promptly to control the ambient temperature, especially to prevent the generation of electric arcs and spark discharges, combined with instrument measurement and other methods to complete the inspection.