Specific Figures For Sa Series With Epac Controls 3.Xx/Ni In Sil Version With Actuators - AUMA SA3 Manual

9.2 Specific figures for SA series with EPAC controls 3.XX/NI in SIL version with actuators
Information The following key figure tables provide an example of safety-related figures for the different
versions. Complete data records of safety-related figures of all variants are available within
the exida test report. For the relevant figures, refer to the pertaining order-related Declaration
of Incorporation.
When determining the PFD values, please note that the stipulated proof test cannot fully
restore the system. For this reason, the following data is used for calculation:
• PTC = 90 % (proof test coverage rate [%])
• T1 = 1 year (proof test interval [h])
• T2 = 10 years (requirement interval = lifetime [h])
• MRT = 72 hours (mean repair time [h])
• Td_ESD = 730 hours
(diagnostic test interval of actuator monitoring (for safety function Safe ESD [h])
• Td_ESD_AVG = 365 hours (mean duration for failure detection)
• Td_STOP = 0 hours (diagnostic test interval [h])
• MTTR_ESD = 437 hours
• MTTR_STOP = 72 hours
The following formula can be used for the calculation of the PFD values:
Table 10: SA series with EPAC controls in SIL version
SA3 to SA100
Switchgear version: Contactors
Safety function Safe ESD CLOSE
λ 230
s
λ 853
DD(FIT)
374
λ
du(FIT)
SFF 74 %
DC 70 %
SIL capability SIL 2 (HFT = 0)
SIL 3 (HFT = 1)
1) including detected "annunciation" failures (λ ) (failures in diagnostic function)
Table 11: SAR series with EPAC controls in SIL version
SAR3 to SAR100
Switchgear version: Thyristor
Safety function Safe ESD CLOSE
λ 183
s
λ 880
DD(FIT)
383
λ
du(FIT)
SFF 74 %
DC 70 %
SIL 2 (HFT = 0)
SIL capability
SIL 3 (HFT = 1)
1) including detected "annunciation" failures (λ ) (failures in diagnostic function)
Safe ESD OPEN
226
857
354
75%
71%
SIL 2 (HFT = 0)
SIL 3 (HFT = 1)
AD
Safe ESD OPEN
179
884
363
75%
71%
SIL 2 (HFT = 0)
SIL 3 (HFT = 1)
AD
37
Multi-turn actuators
SA series with Control 3.XX /NI/SIL
avg
Safe STOP
402
310
278
72 %
53 %
SIL 2 (HFT = 0)
SIL 3 (HFT = 1)
Safe STOP
392
310
227
76 %
58 %
SIL 2 (HFT = 0)
SIL 3 (HFT = 1)