Alcatel 7750 SR-12, Руководство по установке

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Chassis Features
Page 28
7750 SR-12
AC P
OWER
S
UPPLY
M
ODULES
The AC to DC power converter (rectifier) changes 200/240V AC power to -52 VDC power.
The power shelf can accommodate up to three 2500W or three 1200W AC-input power rectifiers
that plug into a common power backplane in the AC-input power shelf. Each AC power shelf
should be wired to a separate DC PEM installed in the 7750 SR-12 chassis. A maximum of two AC
power shelves can be connected to a chassis when two DC PEMs are installed.
The rectifiers in each power shelf provides automatic load-sharing supporting an equal percentage
of the load. When a rectifier is removed, the remaining rectifiers adjust to fulfill the power
requirements and maintain uninterrupted system power.
The rectifiers in the AC power shelf are hot-swappable. You can remove or replace a power
module while the system is operating without affecting system operation. For maximum
redundancy, each AC-input power module should be connected to a separate AC power source.
The power source (outlet) should be located near the equipment rack and be easily accessible.
The power cord serves as a disconnect device for each shelf. To remove power to an individual
rectifier, the unit must be disconnected from the connectors.
Figure 5: 7750 SR-12 AC Power Rectifier (Example)
AC OK
DC OK
FAULT
1
2
SR12022