between CO2 and FM200 which kind of gases is proper for fire protection of switch gear room?
If the room is rarely occupied, CO2 might be the better option. CO2 systems are easier than more economical to recharge in case of discharge. Also, they hay an historically high effectiveness rate (around 87% of fires where controlled) Unfortunately the work by displacing oxygen, which can kill any occupants inside the room when a discharge occurs.
If there's occasional occupancy, a FM200 system is the safer option. FM200 systems require less amount and less cylinders than CO2 systems. FM200 systems are usually designed for a 7% concentration, which is below the 9% NOAEL.
Retrieving data ...