methods of protection proposed for NeSSI
NeSSI proposes Methods of Protection suitable for ClassI,Division/zone 1 ,Group A to D and T4 rating the following methods of protection have been advanced to achieve that classification
1>Intrinsic safety (Ex ib) and Encapsulation (Ex m)
for the sensor/actuators
2>Explosion/flame proof (Ex d)
for the enclosure heating or cooling system
3>Explosion/flame proof (Ex d)
for the sensor analytical manager (SAM)
4>Encapsulation/ potting and Over-temperature trip
for the optional substrate heater(s)
5>Intrinsic safety (Ex ib)
for the wiring methods for the sensor/actuator bus.
6>Explosion proof (Ex d)
for the wiring methods for the optional enclosure (120/240 vac) heater (s) or cooler (s)