The Connecticut Valley Electric Exchange (CONVEX) operates the electric transmission system in Connecticut and western Massachusetts, serving more than 1.7 million people. CONVEX provides safe and reliable electricity to help boost the economy and quality of life for this thriving region's residential and business customers.

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* Please note that all data is preliminary and is subject to change.

New England Load Graph

Connecticut Load Graph

CONVEX Load Graph


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  • Power Warning
    Public appeals when an immediate reduction in power usage is necessary to avert overload of the electrical system. Public appeals are made when other efforts (e.g. emergency purchases, voluntary curtailment, contracted curtailment and voltage reduction) have been unsuccessful in bringing supply and demand back into balance.
  • Conservation Day
    Public appeal to customers to conserve electricity in anticipation of heavy electrical demand and unhealthy air quality conditions, usually due to humid weather.
  • Load Shedding
    An almost instantaneous cutting of power to customers because demand for electricity has outstripped supply.

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  • Q: What is load shedding?

    Load shedding -- an almost instantaneous cutting of power to customers -- would be used only in extraordinary situations, such as losing a major generating station or a large power line. This is done to preserve the electric system and so utilities can continue to provide service to the large majority of its customers. It would likely come without warning. The next step utilities could use in this emergency response process is the rolling blackout. These would be managed interruptions that would last for specified time intervals, usually no more than a few hours. When possible, advance warning of either load shedding or rolling blackouts would be given, but in most cases action may be necessary without time for notice.

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