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


  • Rolling Blackouts
    Temporary interruption of electrical service. ISO New England would implement rolling blackouts only if and when New England's electrical system is unable to meet heavy peak demands because of an extreme deficiency in the power supply. By temporarily disconnecting electrical circuits on a rotating basis, a majority of customers have power, inconvenience is minimized and a more serious widespread problem is averted. Each rotation is of a specific duration, usually no longer than a few hours, but it could take longer in some locations due to the manual nature of the operation.
  • Power Watch
    Advisories to be announced when conditions are such that further steps to manage capacity could affect the public.
  • 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.

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  • Q: What should customers do with appliances and electronic equipment?

    If power to your home or business is interrupted, the best thing to do is leave only a light or two on -- so you know when power is restored. Turn any air-conditioning appliances off, if possible. Keep any refrigerators or freezers closed as much as possible until power returns.

    Customers are asked to turn off electrical equipment during a blackout so that when power is restored, the system can return to normal as quickly as possible. If large equipment is not switched off, the surge of power trying to restart all of this equipment will trip a circuit breaker again. This could delay by hours the orderly restoration of power to an area.

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