CARLO GAVAZZI WM23-96 - PROGRAMMING Manual de Instruções descarregar pdf (Página 2)

What is and Why use the

Energy Management Components

Green levies, tighter operating margins and profits are

a few economic drivers forcing operators to use more

intelligent power management strategies.

Real-time measurements of electrical parameters, such as

voltage variations or distortions, can be transmitted via

networks to operators, warning of breaches in threshold

limits. And, the power quality information improves

on-site efficiency and eases negotiation with utility

companies and energy authorities.

For starters, several utility meters or power analysers

should be located at the service entrance and at strategic

points throughout the site. Data can be transmitted to a

host PC over a serial link. Meanwhile, an energy mana-

gement software improves real-time data from several

networked nodes so to work out a power profile.

Large commercial or industrial electricity consumers

have to deal with fixed energy charges related to the

power demand of one or more sites as well as the charge

per unit of energy consumed. If the business exceeds

the agreed power demand or “installed power” then it

is forced to pay extra costs. To matters worse, utilities

can also impose higher installed power tariffs that can

often represent up to 60% of a commercial consumer’s

total utility charge. So clearly, a small mistake that

leads to a brief excess power demand can cost many

thousands of euro.

Carlo Gavazzi supplies EM systems that provide infor-

mation so that operators can identify consumption

trends and take corrective actions. Analysing the power

profile operators can also aggregate loads and so

negotiate more favourable terms with the utility com-

pany. Real time power consumption monitoring also

allows a site manager to anticipate overloads conditions

that would, for example, trip a circuit breaker.

Alarm thresholds can be set to warn managers if preset

limits are reached, and armed with the adequate

system loading and status information having time to

organise remedial actions.

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CARLO GAVAZZI WM23-96 - PROGRAMMING Manual de Instruções Página 2