Office Buildings
Very High Band width 01 10 001 100 0001 1000 00 11 01 1000 00 01 00 10 100 0101 10 1 0 10 001 100 0001 1000 00 11 01 001 01 10 001 100 0001 1000 00 11 01 1000 00 01 00 10 100 0101 10 1 0 10 001 100 0001 1000 00 11 01 001 100s Mbits Per Second
istics—geography, distribution feeder electrical capabilities and constraints, customer density, human and financial resources, customer demographics and preferences, and a host of other characteristics—will determine the requirements for the communication system. Some of the more important factors in this deci-
Feeder Device
Substation
High Bandwidth
01 10 001 100 0001 1000 00 11
1000 00 01 00 10 100 0101 10 1
10 001 100 0001 1000 00 11 01
100s Mbits
Per Second
Low
Bandwidth
01 10 001 1 1 00 0 1 10
< 10 Kbits
Per Second
sion are described in Table 1 (pg. 22).
In addition to these factors, a DA communications system must address today’s needs while providing the ability to add future functionality.
A wide array of technology and configuration alternatives exist for DA, including both wireless and wired technologies
configured in a variety of network architectures. It is important to remember that most networks will be a hybrid of several of these technologies.
Fixed radio solutions include pagers, licensed or unlicensed radios, cellular or satellite.
Pagers can receive alert signals or short messages from feeder devices or transmit simple on/off commands. The network costs of leasing from a third-party paging provider are usually very inexpensive; often less than $5 per month per site, and sometimes just $1 per month per site. The hardware costs for telemetry paging generally range from $75 to $100. For a large number of sites (possibly hundreds) and low data volume (less than 100 bytes per month), it may be possible to negotiate rates well below $1 to $3 per site for
Go to http://uae.hotims.com for more information.
References:
Archives