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Intel® Server Chassis SC1400UP / Intel® Server Platform SR1425BK1-E
The power supply complies 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.
6.11 AC Line Fast Transient (EFT) Specification
The power supply meets 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 do not cause any out-of-regulation conditions, such as overshoot
and undershoot, nor any nuisance trips of any of the power supply protection circuits.
• The surge-withstand doe not produce damage to the power supply.
The supply meets surge-withstand test conditions under maximum and minimum DC-output
load conditions.
6.12 AC Line Dropout / Holdup
An AC line dropout is defined to be when the AC input drops to 0VAC at any phase of the AC
line for any length of time. During an AC dropout of one cycle or less the power supply must
meet dynamic voltage regulation requirements over the rated load . An AC line dropout of one
cycle or less (20ms min) shall not cause any tripping of control signals or protection circuits ( =
20ms holdup time requirement). If the AC dropout lasts longer than one cycle the power supply
should recover and meet all turn on requirements. The power supply must meet the AC dropout
requirement over rated AC voltages, frequencies, and 75%maximum output loading (225W)
conditions. Any dropout of the AC line shall not cause damage to the power supply. The power
supply shall holdup through 15ms AC drop out during at maximum output loading conditions.
6.12.1 AC Line 5VSB Holdup
The 5VSB output voltage should stay in regulation under it's full load (static or dynamic) during
an AC dropout of 70ms min (=5VSB holdup time) whether the power supply is in ON or OFF
state (PSON asserted or de-asserted).
6.13
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.
6.13.1 Voltage Brown Out
The power supply shall comply with the limits defined in EN55024: 1998 using the IEC 61000-4-
11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
In addition the power supply shall meet the following Intel Requirements:
A continuous input voltage below the nominal input range shall not damage the power supply or
cause overstress to any power supply component. The power supply must be able to return to
normal power up state after a brownout condition. Maximum input current under a continuous
brownout shall not blow the fuse. The power supply should tolerate a 3min ramp from 90VAC
voltage to 0VAC after the components have reached a steady state condition.
6.13.2 Voltage Interruptions
The power supply shall comply with the limits defined in EN55024: 1998 using the IEC 61000-4-
11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
Revision 1.0
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