Technical Product Specification

Intel® Server System R2000IP Product Family TPS Power Subsystem
Revision 1.1
21
current 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 Top, (includes hot and cold inrush). It is
acceptable that AC line inrush current may reach up to 60A peak for up to 1msec.
3.5.11 AC Line Surge Immunity
The power supply shall be tested with the system for immunity to AC Ring Wave and AC
Unidirectional wave with 2kV for line to Gnd and 1kV for line to line per EN 55024:1998,
EN 61000-4-5:1995 and ANSI C62.45: 1992.
The pass criteria include: No unsafe operation is allowed under any condition; all power
supply output voltage levels to stay within proper spec levels; No change in operating state or
loss of data during and after the test profile; No component damage under any condition.
The power supply shall comply with the limits defined in EN55024: 1998 using the IEC
61000-4-5:1995 test standard and performance criteria B defined in Annex B of CISPR 24.
3.5.12 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 13. AC Line Sag Transient Performance
AC Line Sag (10sec interval between each sagging)
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
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
* Note: The load for a full cycle drop out will not exceed 360W.
Table 14. 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
3.5.13 AC Line Fast Transient (EFT) Specification
The power supply shall meet the EN61000-4-5 directive and any additional requirements in
IEC1000-4-5:1995 and the Level 3 requirements for surge-withstand capability, with the
following conditions and exceptions:
 These input transients must not cause any out-of-regulation conditions, such as overshoot
and undershoot, nor must it cause any nuisance trips of any of the power supply protection
circuits.