Ac Line Isolation Requirements; Ac Line Dropout/Holdup; Ac Line Fuse; Ac Inrush - Intel R1000WF Technical Product Specification

Intel® Server System R1000WF Product Family Technical Product Specification
Maximum input current at high input voltage range is measured at 180 VAC, at max load.
This requirement is not to be used for determining agency input current markings.
3.3.3

AC Line Isolation Requirements

The power supply meets all safety agency requirements for dielectric strength. Transformer isolation
between primary and secondary windings must comply with the 3000 VAC (4242 VDC) dielectric strength
criteria. If the working voltage between primary and secondary dictates a higher dielectric strength test
voltage the highest test voltage should be used. In addition, the insulation system must comply with
reinforced insulation per safety standard IEC 950. Separation between the primary and secondary circuits,
and primary to ground circuits, must comply with the IEC 950 spacing requirements.
3.3.4

AC Line Dropout/Holdup

An AC line dropout is defined to be when the AC input drops to 0 VAC at any phase of the AC line for any
length of time. During an AC dropout the power supply meets dynamic voltage regulation requirements. An
AC line dropout of any duration does not cause tripping of control signals or protection circuits. If the AC
dropout lasts longer than the holdup time, the power supply recovers and meets all turn on requirements.
The power supply meets the AC dropout requirement over rated AC voltages and frequencies. A dropout of
the AC line for any duration does not cause damage to the power supply.
3.3.4.1 AC Line 12 VSB Holdup
The 12 VSB output voltage stays in regulation under its full load (static or dynamic) during an AC dropout of
70 msec minimum (12 VSB holdup time) whether the power supply is in an ON or OFF state (PSON asserted
or de-asserted).
3.3.5

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 shall be a slow blow type. AC inrush
current does not cause the AC line fuse to blow under any conditions. All protection circuits in the power
supply do not cause the AC fuse to blow unless a component in the power supply has failed. This includes
DC output load short conditions.
3.3.6

AC Inrush

AC line inrush current does not exceed 55 A 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, upon recovery after AC dropout of any duration, and
over the specified temperature range (T
3.3.7

AC Line Transient Specification

AC line transient conditions are defined as "sag" and "surge" conditions. "Sag" conditions, also commonly
referred to as "brownout," are defined as the AC line voltage dropping below nominal voltage conditions.
"Surge" is defined as 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 12. AC line holdup time, 1100-W power supply

Loading
70%
).
op
Holdup time
10msec
35