Technical Product Specification

Intel® Server System P4000IP and Intel® Workstation System P4000CR Family TPS System Power Sub-system
54 Intel order number G38159-002 Revision 1.2
shall be a slow blow type. AC inrush current shall not cause the AC line fuse to blow under any
conditions. All protection circuits in the power supply shall not cause the AC fuse to blow unless
a component in the power supply has failed. This includes DC output load short conditions.
2.3.2.7 AC Line Transient Specification
AC line transient conditions shall be defined as “sag” and “surge” conditions. “Sag” conditions
are also commonly referred to as “brownout”, these conditions will be defined as the AC line
voltage dropping below nominal voltage conditions. “Surge” will be defined to refer to conditions
when the AC line voltage rises above nominal voltage. The power supply shall meet the
requirements under the following AC line sag and surge conditions.
Table 53. AC Line Sag Transient Performance
AC Line Sag (10sec interval between each sagging)
Duration
Sag
Operating AC Voltage
Line Frequency
Performance Criteria
0 to 1/2 AC
cycle
95%
Nominal AC Voltage ranges
50/60Hz
No loss of function or performance
> 1 AC cycle
>30
%
Nominal AC Voltage ranges
50/60Hz
Loss of function acceptable, self
recoverable
Table 54. AC Line Surge Transient Performance
AC Line Surge
Duration
Surge
Operating AC Voltage
Line Frequency
Performance Criteria
Continuous
10%
Nominal AC Voltages
50/60Hz
No loss of function or performance
0 to ½ AC
cycle
30%
Mid-point of nominal AC
Voltages
50/60Hz
No loss of function or performance
2.3.2.8 Power Recovery
The power supply shall recover automatically after an AC power failure. AC power failure is
defined to be any loss of AC power that exceeds the dropout criteria.
2.3.3 Efficiency
The following table provides the required minimum efficiency level at various loading conditions.
These are provided at three different load levels; 100%, 50%, 20%, and 10%. Output shall be
load according to the proportional loading method defined by 80 Plus in Generalized Internal
Power Supply Efficiency Testing Protocol, Rev. 6.4.3. This is posted at:
http://efficientpowersupplies.epri.com/methods.asp.
Table 55. Platinum Efficiency Requirement
Loading
100% of maximum
50% of maximum
20% of maximum
10% of maximum
Minimum Efficiency
91%
94%
90%
82%
The power supply must pass with enough margin to make sure in production all power supplies
meet these efficiency requirements.