Preventing Power Loss; Power Connection Guidelines - Cisco ASR 902 Installation Manual

Installing the Cisco ASR 902 Router
Products that have an AC power connection are required to have an external surge protective device (SPD)
Note
provided as part of the building installation to comply with the Telcordia GR-1089 NEBS standard for
electromagnetic compatibility and safety.
Do not use power supplies of different capacities together in the router for prolonged durations.
Caution
Do not use interface module or power supply ejector handles to lift the chassis; using these handles to lift
Caution
the chassis can deform or damage the handles.

Preventing Power Loss

Use the following guidelines to prevent power loss to the router:
• To prevent loss of input power, ensure that the total maximum load on each circuit supplying the power
• In some systems, you can use an UPS to protect against power failures at your site. Avoid UPS types
Use the information in the
of a Cisco ASR 902 Router based on a given configuration of the router. Determining power requirements is
useful for planning the power distribution system needed to support the router.

Power Connection Guidelines

This section provides guidelines for connecting the Cisco ASR 902 Router power supplies to the site power
source.
This equipment is intended to be grounded to comply with emission and immunity requirements. Ensure
Warning
that the switch functional ground lug is connected to earth ground during normal use. Statement 1064
The plug-socket combination must be accessible at all times because it serves as the main disconnecting
Warning
device. Statement 1019
This product requires short-circuit (overcurrent) protection, to be provided as part of the building installation.
Warning
Install only in accordance with national and local wiring regulations. Statement 1045
supplies is within the current ratings of the wiring and breakers.
that use ferroresonant technology. These UPS types can become unstable with systems such as the Cisco
ASR 902 Router, which can have substantial current-draw fluctuations due to bursty data traffic patterns.
DC Power Specifications
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
to estimate the power requirements and heat dissipation
Preventing Power Loss
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