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4.6.4.1
AC Line 12VSB Holdup
The 12VSB output voltage stays in regulation under its full load (static or dynamic) during an AC dropout of
70ms min (=12VSB holdup time) whether the power supply is in ON or OFF state (PSON asserted or de-
asserted).
4.6.5
AC Line Fuse
The power supply has one line fused in the single line fuse on the line (Hot) wire of the AC input. The line
fusing is acceptable for all safety agency requirements. The input fuse is a slow blow type. The AC inrush
current does not cause the AC line fuse to blow under any conditions. All protection circuits in the power
supply will not cause the AC fuse to blow unless a component in the power supply has failed. This includes
DC output load short conditions.
4.6.6
AC Inrush
The AC line inrush current does not exceed 55A peak, for up to one-quarter of the AC cycle, after which, the
input current is no more than the specified maximum input current. The peak inrush current is less than the
ratings of its critical components (including input fuse, bulk rectifiers, and surge limiting device).
The power supply meets the inrush requirements for any rated AC voltage, during turn-on at any phase of
AC voltage, during a single cycle AC dropout condition as well as upon recovery after AC dropout of any
duration, and over the specified temperature range (T
4.6.7
AC Line Transient Specification
The AC line transient conditions are defined as sag and surge conditions. Sag conditions are also commonly
referred to as "brownout"; these conditions are defined as the conditions when the AC line voltage drops
below nominal voltage. Surge conditions are defined as the conditions when the AC line voltage rises above
nominal voltage.
The power supply meets the requirements under the following AC line sag and surge conditions.
Duration
0 to 1/2 AC cycle
> 1 AC cycle
Duration
Continuous
0 to ½ AC cycle
Intel® Storage Server System JBOD2312S3SP Hardware Guide
Table 14. AC Line Sag Transient Performance
AC Line Sag (10sec interval between each sagging)
Sag
Operating AC Voltage
95%
Nominal AC Voltage ranges
> 30%
Nominal AC Voltage ranges
Table 15. AC Line Surge Transient Performance
Surge
Operating AC Voltage
10%
Nominal AC Voltages
30%
Mid-point of nominal AC
Voltages
).
op
Line Frequency
50/60 Hz
50/60 Hz
AC Line Surge
Line Frequency
50/60 Hz
50/60 Hz
Performance Criteria
No loss of function or performance
Loss of function acceptable, self
recoverable
Performance Criteria
No loss of function or performance
No loss of function or performance
19
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