Chapter 2
Installing and Cabling Enclosures
39
DC Ground Cable Connections
DC-powered versions of the 5730 and 5130 have a pair of ground studs on the right
rail bracket to which the ground cable connects. The other end of the ground cable
connects to the cabinet grounding rail. In addition, there is a ground cable in the
unterminated end of DC input power cable that connects from the power supply to
the fuse panel or breaker panel. The ground cable in this cable must also connect to
the cabinet grounding rail.
DC Wiring and DC Power Requirements
The system is suitable for installation as part of the Common Bonding Network
(CBN).
The system’s Battery Return (BR) Input Terminals are considered to be an Isolated
DC Return (DC-I).The following are required for all installations:
■
All DC mains and supply conductors to power distribution boxes for the rack-
mounted system must be enclosed in a metal conduit or raceway when specified
by local, national, or other applicable government codes and regulations.
■
Ensure that the voltage of your power source matches the voltage inscribed on
the equipment’s electrical rating label.
■
To ensure redundancy, provide two separate power sources for the enclosures.
These power sources must be independent of each other, and each must be
controlled by a separate circuit breaker at the power distribution point.
■
The system requires voltages within minimum fluctuation. The customer-
supplied facilities’ voltage must maintain a voltage with not more than
± 5 percent fluctuation. The customer facilities must also provide suitable surge
protection.
■
Site wiring must include an earth ground connection to the DC power source.
The supply conductors and power distribution boxes (or equivalent metal
enclosure) must be grounded at both ends.
■
Power circuits and associated circuit breakers must provide sufficient power and
overload protection. To prevent possible damage to the DC power distribution
boxes and other components in the rack, use an external, independent power
source that is isolated from large switching loads.
DC Power System Warnings
To reduce the risk of electric shock or damage to the equipment DC power supplies
must be installed in accordance with the following guidelines:
Содержание R/Evolution 2730
Страница 1: ...2730 Getting Started Guide P N 83 00004284 12 Revision A January 2009 ...
Страница 6: ...6 R Evolution 2730 Getting Started Guide January 2009 ...
Страница 54: ...54 R Evolution 2730 Getting Started Guide January 2009 ...
Страница 70: ...70 R Evolution 2730 Getting Started Guide January 2009 ...