Technical Product Specification

Intel® Server System SR1560SF TPS Power Sub-System
Revision 1.2
Intel order number D92959-006
17
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% and 20%. Efficiency was tested
over an AC input voltage range of 115VAC to 220VAC.
Table 11. Power Supply Efficiency
Loading 100% of maximum 50% of maximum 20% of maximum
Minimum Efficiency 80% 80% 80%
3.4 AC Input Voltage Specification
The power supply operates within all specified limits over input voltage range shown in the
following table. Harmonic distortion of up to 10% THD will not cause the power supply to go out
of specified limits. The power supply shall power off if the AC input is less than 75VAC +/-5VAC
range. The power supply shall start up if the AC input is greater than 85VAC +/-4VAC.
Application of an input voltage below 85VAC will not cause damage to the power supply,
including a fuse blow.
Table 12. AC Input Rating
Parameter Min Rated Max Start up VAC Power Off VAC
Voltage (110) 90 V
rms
100-127 V
rms
140 V
rms
85Vac +/-4Vac 75Vac +/-5Vac
Voltage (220) 180 V
rms
200-240 V
rms
264 V
rms
Frequency 47 Hz 63 Hz
3.4.1 AC Line Transient Specification
AC line transient conditions are defined as “sag” and “surge” conditions. “Sag” conditions are
also commonly referred to as a “brown-out”. These conditions are defined as the AC line voltage
dropping below nominal voltage conditions. “Surge” refers to 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.
Table 13. AC Line Sag Transient Performance
AC Line Sag
Duration Sag Operating AC Voltage Line Frequency Performance Criteria
Continuous 10% Nominal AC Voltage
ranges
50/60Hz No loss of function or performance
0 to 1 AC
cycle
100% Nominal AC Voltage
ranges
50/60Hz No loss of function or performance
> 1 AC cycle >10% Nominal AC Voltage
ranges
50/60Hz Loss of function acceptable, self
recoverable
100% sag will be performed at 80% load for 1AC cycle.