Can intrinsically safe instruments be used independently in hazardous areas?
Thread Content
1. In an intrinsically safe circuit, there are only intrinsically safe instruments and intrinsically safe barriers; can intrinsically safe instruments achieve explosion-proof effects? 2. Only intrinsically safe instruments are present in the intrinsically safe circuit; can such instruments achieve an explosion-proof effect?
Only an intrinsically safe system is truly intrinsically safe; none of its components can be missing.
If we follow the book, it won’t work.
What is the definition of intrinsically safe? It keeps the energy within acceptable limits to prevent explosions; according to the calculation requirements, the energy in the entire circuit is safely confined within safe boundaries. Therefore, only intrinsically safe instruments that cannot form an intrinsically safe circuit are unable to limit energy. For intrinsically safe circuits, it is necessary to include all devices that contain energy within the circuit; in typical circuits, these are the instruments and cables!
1. Intrinsic safety instruments are used in combination; this includes the signals as well. 2. A single intrinsic safety instrument is not explosion-proof; it must be used together with a safety barrier, or an intrinsically safe instrument should be employed instead
A complete intrinsically safe system consists of intrinsically safe instruments, safety barriers, and cables that meet the required standards; none of these components can be omitted.
1. In an intrinsically safe circuit, there are only intrinsically safe instruments and intrinsically safe barriers; can intrinsically safe instruments achieve explosion-proof effects? Not necessarily, because you didn’t mention intrinsically safe cables. If a regular cable is used, the capacitance and inductance in the circuit need to be calculated. Generally, an intrinsically safe instrument + intrinsically safe cable + intrinsically safe barrier = an intrinsically safe explosion-proof circuit. 2. In an intrinsically safe circuit, there are only intrinsically safe instruments – can such instruments achieve an explosion-proof effect? It certainly will not meet the explosion-proof requirements
Who told you that you don’t need to calculate capacitance and inductance for intrinsically safe cables?
An intrinsically safe circuit refers to a measurement circuit in which all the instruments, including cables and safety barriers, are of the intrinsically safe type; a single instrument alone does not meet explosion-proof requirements, but measurement can still be carried out without issues.
It’s actually a fifth-grader saying such stupid things – what a shame! @, The moderator was right after all. Again, in Zone 0, only intrinsically safe explosion protection can meet the requirements. The rest are all Zone 1 and Zone 2. However, in actual construction, the vast majority of wiring is not carried out in strict accordance with the requirements for intrinsically safe circuits.
Sea friends can recommend some learning materials; it’s mainly my lack of knowledge that limits my abilities.