Power Supply Operation; Load Sharing; Calculating The Power Consumption Of Corebuilder Switch - 3Com CoreBuilder 7000 Installation & Start?Up Manual

C 7: R
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HAPTER EDUNDANCY IN THE
Power Supply
Operation
Calculating the Power
Consumption of
CoreBuilder Switch
C B 7000 F
ORE UILDER
The CoreBuilder 7000 family power supplies are shown in Table 19.
Table 19 CoreBuilder 7000 Family Power Supplies
Power Supply
CoreBuilder 7000/7000HD AC Power Supply
CoreBuilder 7000/7000HD DC Power Supply
CoreBuilder 7000/7000HD DC Power Supply

Load Sharing

The power supplies can operate in load-sharing mode; two 90A power
supplies can produce up to 180A. Providing that the power consumption
of the unit does not exceed 90 A, load-sharing allows one power supply
to serve as a backup.
Overloading
When the installed power supply is rated for less than the required power
consumption of the CoreBuilder module, the CoreBuilder will not
succeed in powering up. It will attempt to power up, hit the current
overload rate and turn the power supply off, going through this cycle
repeatedly until the load is reduced.
The power consumption of an entire CoreBuilder 7000 family ATM switch
unit is calculated by adding up the power consumption of the switching
card(s) and interface cards installed in the chassis. Normally, the values for
typical power consumption can be used in the calculation. Table 20
shows the typical power consumption values for the CoreBuilder 7000
family ATM switching cards and interface cards.
Table 20 Typical Power Consumption of CoreBuilder 7000 Family Cards
Component Description
CoreBuilder Kit and Switching Card
CoreBuilder 7000 Kit (one switching card and
one power supply)
CoreBuilder 7000 Redundant Switching Card
CoreBuilder 7000HD Kit (one switching card and
one power supply)
ATM S
AMILY WITCH
†
3Com
Current Number
90A 3C37010A
90A 3C37027
40A 3C37026
Typical * Power
3Com Consumption
Number (Amp)
3C37000 6.3
3C37016 6.3
3C37001 8.1