First, pay attention to the capacitive reactance and inductive reactance of cables and field equipment, intrinsic safety explosion-proof is the system explosion-proof, in addition to the safety gate needs to reach the required explosion-proof level, the energy storage of cables and field equipment is also a key issue. Especially after the certification of parametric certification alternative system, the engineer should pay special attention to this problem.

Second, pay attention to intrinsic safety grounding, safety gate needs intrinsic safety grounding, grounding resistance should be less than 1.

Third, intrinsic safety cables and non-intrinsic safety cables should be laid separately in different cable slots. And should be clearly marked.

Fourth, the replacement should pay attention to power off.