Huawei PAC3000S12-T1 PSU Technical Manual page 32

PAC3000S12-T1 PSU
Item
Busbar voltage in fault
conditions
Technical Manual
Minimum Typical
11.4 -
5 Energy Saving Feature
Maximum Unit Remarks
13.0 V Except output
overvoltage and
internal short-circuit.
1+1 active/standby (hot
standby) power supply
scenario (AC+AC, AC
+HVDC, HVDC+HVDC):
If the input of either
PSU is removed and
then inserted, powered
off, or faulty (such as
input undervoltage,
input overvoltage, fan
fault, or
overtemperature), the
12 V busbar voltage
must be greater than or
equal to 11.4 V. This is
not required if 12 V is
short-circuited before
ORing-FET or the
voltage is lower than
11.4 V after PSU swap
(with the power cable
connected) for no more
than 100 ns.
Performance is not
tested for cold standby
scenarios.
The 12 V output of
parallel PSUs is
equipped with 810 µF
capacitors.
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