Basis for installing lightning protection grids in instrument circuits
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In instrument circuits, is it necessary to install surge protectors? Are there any regulatory standards regarding this?
For reference, SH/T 3164-2012 \"Code for Lightning Protection Design of Instrumentation Systems in Petroleum and Petrochemical Industries\"
So sophisticated! With so many circuits, should surge protectors be installed on all of them? In the electrical engineering field, surge protectors are installed at the source of power supply (which incurs certain costs) to ensure that both the UPS and the mains power have this protection feature; individual units do not require such protectors.
Personal experience: Not necessary for ordinary circuits. For open installations such as tank areas and sewage treatment facilities that lack adequate lightning protection or shielding, and are therefore prone to being struck by lightning, it is necessary to install surge protectors at the instrument circuits. If you have the money to be selfish, then go ahead and do it.
1. Design principles are specified in SHT 3164-2012, Code for Design of Lightning Protection Systems in Petrochemical Instrumentation Systems. 2. At the boundary between feasible and non-feasible solutions, for safety reasons, lightning protection design is required for areas such as tank farms that are exposed to lightning strikes and represent major hazard sources； It is generally not implemented in the plant area, as there are tall towers there that can serve as lightning rods, providing a certain degree of protection.