63
Nominal Voltage
Rated Frequency
220 V, 380 V
50 Hz
A UPS is typically used as an AC potential power of network products. A UPS should
be in the same phase as the mains supply. The time used for switching between
the UPS and the mains supply should be less than 8 ms. Otherwise, the server will
reboot or reset.
8.10.2
Requirements for DC Power Supply
The DC power supply system should work under nominal voltage of -48 V, 270 V
and 380 V.
8.10.3
Recommendations on the AC Power Supply
Recommendations on the AC power supply are as follows:
Use a voltage stabilizer or voltage regulator to respond to voltage fluctuations.
Use a voltage-regulator in the following situations:
-
The server is directly powered by the mains supply, and the power supply
voltage exceeds the rated voltage by -10% to +5% or the voltage range
allowed for the server.
-
The server is not directly powered by the mains supply, and the mains
voltage exceeds the rated voltage by -15% to +10% or the AC input voltage
range allowed for the DC power equipment.
To prevent interruption or surge of AC power supply, use the UPS or inverter.
The data center should be equipped with self-supplied generator set in case of
mains failure to ensure proper function of important load and important
power load. All electrical equipment such as IT equipment and refrigeration
equipment shall be considered. Check the start-up shock to ensure that the
generator can start reliably. The generator performance should meet the
requirements of Code for Design of Data Centers (GB50174).
Connect two storage battery strings in parallel. A second UPS is needed as
redundant backup.
8.10.4
HVDC Power Supply
The high-voltage direct current (HVDC) system can eliminate the problems existing
in conventional AC and low-voltage DC power supplies. At present, 240 V HVDC
standards and 336 V HVDC standards are the mainstream HVDC standards used in
China.
