Pfhges, Mttf, 1ܯܶܶܨ – BECKHOFF TwinSAFE Benutzerhandbuch
Seite 95: 1 ܯܶܶܨ, ݐ݉ܽݐݐ݁) + 1 ܯܶܶܨ, ܭ1)), ܯܶܶܨ, K1) = ܤ10, ܭ1) 0,1 כ, כ 8760
Schaltungsbeispiele
Applikationshandbuch TwinSAFE
93
zu:
PFHges=
PFHges=
PFHges=
PFHges=
4,20E-09+1,11E-09 + 1,03E-09 + 1,25E-09 + 10%* (1,94E-08+1,94E-08)/2 =
9,53E
9,53E
9,53E
9,53E----09
09
09
09
Die Berechnung des MTTF
d
-Wertes für Block 1 (unter der gleichen Annahme) berechnet sich mit:
1
ܯܶܶܨ
ௗ ௦
=
1
ܯܶܶܨ
ௗ
ୀଵ
als:
1
ܯܶܶܨ
ௗ ௦
=
1
ܯܶܶܨ
ௗ
(݄݈ܵܿܽݐ݉ܽݐݐ݁) +
1
ܯܶܶܨ
ௗ
(ܧܮ1904) +
1
ܯܶܶܨ
ௗ
(ܧܮ6900)
+
1
ܯܶܶܨ
ௗ
(ܧܮ2904)
+
1
(ܯܶܶܨ
ௗ
(ܭ1))
mit:
ܯܶܶܨ
ௗ
(K1) =
ܤ10
ௗ
(ܭ1)
0,1 כ ݊
Sind für EL1904 und EL6900 nur PFH Werte vorhanden, gilt folgende Abschätzung:
ܯܶܶܨ
ௗ
(ELxxxx) =
(1 െ ܦܥ(ܧܮݔݔݔ))
ܲܨܪ(ܧܮݔݔݔ)
Somit:
ܯܶܶܨ
ௗ
(EL1904) =
൫1 െ ܦܥ(ܧܮ1904)൯
ܲܨܪ(ܧܮ1904)
=
(1 െ 0,99)
1,11E െ 09
భ
כ 8760
౯
=
0,01
9,72E െ 06
భ
౯
= 1028.8y
ܯܶܶܨ
ௗ
(EL6900) =
(1 െ ܦܥ(ܧܮ6900))
ܲܨܪ(ܧܮ6900)
=
(1 െ 0,99)
1,03E െ 09
భ
כ 8760
౯
=
0,01
9,02E െ 06
భ
౯
= 1108,6y
ܯܶܶܨ
ௗ
(EL2904) =
(1 െ ܦܥ(ܧܮ2904))
ܲܨܪ(ܧܮ2904)
=
(1 െ 0,99)
1,25E െ 09
భ
כ 8760
౯
=
0,01
1,1E െ 05
భ
౯
= 913,2y
MTTF
d ges
=
ଵ
భ
మళభ,ళ
ା
భ
భబమఴ,ఴ
ା
భ
భభబఴ,ల
ା
భ
వభయ,మ
ା
భ
ఱఴ,వ
= 42,3ݕ
DC
avg
=
వవ%
మళభ,ళ
ା
వవ%
భబమఴ,ఴ
ା
వవ%
భభబఴ,ల
ା
వవ%
వభయ,మ
ା
వవ%
ఱఴ,వ
ା
వవ%
ఱఴ,వ
భ
మళభ,ళ
ା
భ
భబమఴ,ఴ
ା
భ
భభబఴ,ల
ା
భ
వభయ,మ
ା
భ
ఱఴ,వ
ା
భ
ఱఴ,వ
= 99,0%