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Application - electric utility provides a central metering
point, "campus" involves a series of buildings or
load points which require separate energy data and perhaps kWh
demand monitoring and control. Submetering and demand monitor
can take place at each building with the data from each building
analyzed at a central location.
Submetering - CTs at each building service entrance
with a metering interface module provides a method of recording
kWh energy for the specific building and an interface to Demand
Monitor.
Drawing TX207 shows a typical arrangement. See the detail sections
within this site.
Energy Monitor Submetering
Options
Demand Monitor & Control
Central Operations - the individual load point demand
and energy information is very easily and cost effectively wireless
transmitted, to a central location. This location can produce
15-minute interval and kWh energy for each building through
a centralized computer system. Depending upon the campus size/number
of submetering points, the collection and transmission of this
metering data can be as low as $200 per load point.
With the central operations analysis and decision making capability,
communication can take place back to a demand controller at
each building causing shedding of non-critical loads.
The demand controller at each building will have a threshold
point either loaded in at the building or remotely loaded from
central operations. This demand controller then goes into action
by opening various relay contacts at various circuit breaker
panels within the building. At these circuit breaker panels
Peak Interrupters are installed which actually do the high current
interrupt.
Drawing TX208 is a simple illustration of this demand controller/load
shedding arrangement at each building.
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