Eaton ZB12/XTOB BC1 Series Manual page 50

46
Size
Category
1)
Performance Level (PL)
2)
MTTF after 3 years
d
1) The performance level is the result of the risk assessment
based on the percentage of risk mitigation achieved with the
control system's safety-related parts.
2) MTTF = Mean time to dangerous failure
d
03/15 MN03407004Z-DE/EN
Value
1
c
54 years