Failure rates 29
Table 6 continued
-
Failure rates of power equipment
1
PEC/NT
1
Description
1
Failure Rate
Code per
lo6
hrs
NT8D62AA Temperature Sensor Panel
N/A
NT8D62DC
QBL12
Battery Distribution Box 1.10
1
QBLl5
I
Power/Battery Distribution
I
2.81
QCA13
Box
DC Power Plant
1
QCA321
I
Junction Box
!
N/A
QPC188
QRF12
1
Battery Monitor
I
48V Rectifier
I
N/A
1.20
1
QRF12 I-52V Rectifier
I
N/A
Table 7
Failure rates of mass storage equipment
Note:
There are many replacement cables (not fisted here) in lengths
appropriate for various configurations available from Northern
Telecom. The approximated failure rates for most cables are the same
(0.50); the measurement is based on failures in time per billion hours
(FIT) or 109. For a detailed listing of the cables available from
Northern Telecom,
see Equipment identijication and ordering
(553-3001-154).
Spares planning 553-3001-153
.
.