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Anonymous users2024-02-07The Safe Spark Explosion Protection System is in fact the highest explosion protection class available.
It must meet the requirements of the Code for the Design of Electrical Installations in Fire Hazard Environments (GB50058-1992).
Specifically, there are two main aspects:
1. In abnormal conditions, the temperature of the parts that may be in contact with combustible gas should not exceed the minimum temperature group in GB50058-1992;
2. In an abnormal state, the (electrical) energy generated cannot ignite the highest group of combustible gas grouping in GB50058-1992.
In order to meet the standards of the safety spark explosion-proof [system] in practical applications, first, there must be safety isolation equipment, and second, all equipment on the safety isolation equipment and its dangerous side (site) must meet the intrinsic safety level.
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Anonymous users2024-02-06Instruments used in hazardous locations must be spark safe.
Explosion meter (intrinsically safe meter).
The electrical connection between the field instrument and the hazardous location is required.
Pass through the safety barrier.
explosion-proof barrier). Concept of a safe spark explosion protection system.
The instrument is installed at the production site, and if there are flammable and explosive gases, liquids or powders on the site, once a dangerous spark occurs, it may cause combustion or accidents. In order to solve the explosion-proof problem of electric instruments, people have made unremitting efforts for a long time. Before the emergence of the safety spark explosion-proof method, the traditional explosion-proof instrument types are oil-filled (O), gas-filled (P), sand-filled (Q), flameproof (D), increased safety (E), non-spark (N), etc., and the basic idea is to isolate the circuit that may produce dangerous sparks from the structure and the first gas.
Obviously, this is very different from the safe spark explosion protection method. The safety spark instrument considers explosion-proof from the beginning of the circuit design, and limits the sparks that may occur in various states such as short circuit, open circuit and misoperation to the ignition energy of the first gas, and takes measures to solve the explosion-proof problem from the root cause of the first occurrence, so it is considered that it can be included in the intrinsic safety as pneumatic and hydraulic instruments.
Inside the explosion-proof instrument. Compared with structural explosion-proof instruments, the advantages of safety spark explosion-proof instruments are outstanding. First of all, its explosion-proof rating.
It is one level higher than the structural explosion-proof instrument, and can be used in the most dangerous places such as hydrogen and acetylene that the latter is not capable of; Secondly, it will not reduce the explosion-proof level after long-term use; In addition, this instrument can also be used in operation with safety spark type test instrument for live testing and maintenance at dangerous sites, so it is widely used in the control of petroleum, chemical and other hazardous places.
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