2 Engineering
2.5 Mean time to dangerous failure MTTFD
28
CMD(220-240VAC), CMDB
12/17 MN121002ZU-DEEN
www.eaton.com
Table 1: B
10D
values for contactors
The MTTF
D
time of the contactor is calculated according to formula 2 with
the mean annual number of switch operations depending on the application.
The MTTF
D
value of the undervoltage release depends on the application.
The following values can be estimated for B
10D
:
Table 2: B
10D
values for undervoltage release
Contactor
B
10D
value
Utilization category AC-3
Switch operations
DILM7
1,782,229
DILM9
1,782,229
DILM12
1,782,229
DILM17
966,617
DILM25
966,617
DILM32
966,617
DILM40
1,341,161
DILM50
1,341,161
DILM65
1,341,161
DILM80
1,300,000
1)
DILM95
1,300,000
1)
DILM115
1,705,268
DILM150
1,705,268
DILM185
1,300,000
1)
DILM225
1,300,000
1)
DILM250
1,300,000
1)
DILM300
1,300,000
1)
DILM400
1,300,000
1)
DILM500
1,300,000
1)
DILM580
1,300,000
1)
DILM650
1,300,000
1)
DILM750
1,300,000
1)
DILM820
1,300,000
1)
DILM1000
1,300,000
1)
1) Values according to table C.1, ISO13849-1:2016-06
for connectors with nominal load
Undervoltage release
B
10D
value
Switch operations
NZM1
10000
NZM2
10000
NZM3
7500