Historically, Rate 11 Panels were widely used in Vermont in the 80’s and 90’s to control electric heat during the On-Peak Time. Green Mountain Power’s residential Rate 11 was used primarily with homes and condominiums with electric baseboard or radiant ceiling heat. The Rate 11 is structured as a 2-tier Energy Time-of-Use Rate that has differential costs for between kilowatt-hours used during the On-Peak time and the Off-Peak time. For example, the On-Peak Time might be Monday through Friday from 1PM to 9PM. Kilowatt-hours used during On-Peak Time might be 26 cents, while those used during Off-Peak are 11 cents. The Rate 11 panels automatically force the electric heat off during the On-Peak time but allow the resident, guest or occupant to override the panel as needed. Electric cost savings were achieved by primarily moving the kilowatt-hours of energy use for heating to the less expensive Off-Peak times.

Energy Sentry's Model 9411 Rate 11 Demand Controller allows the owner to upgrade all of the electronics of the Rate 11 panel to a much newer and more reliable electronics technology, thus ensuring reliable operation for years to come. The Rate 11 Demand Controller includes a control/display panel and relay control assembly. The 18"x12"x4" NEMA 1 Enclosure is optional. These assemblies fit into the existing enclosures and utilize the existing power relays and control cable, making the installation process quick and easy.

The Rate 11 Panel Demand Controller can also be used with Rate 22 or any other Time-of-Use rate that uses an external signal to initiate the On-Peak time.

Description of Operation

Upon receiving the On-Peak signal from the electric meter or a load management receiver, the Model 9411 system initiates control of all electric loads connected to the system. All electric loads are turned off. When the On-Peak signal is discontinued, all loads should restore within 30 to 60 seconds. If while the On-Peak signal is being received, and heat is desired, the user simply presses the momentary push button switch for that particular heat zone. One or more zones may be overridden. Once the heat is no longer needed, assuming it is still On-Peak time, the override may be cancelled by pressing the “cancel” push button. Upon the transition from On-Peak to Off-Peak all electric loads are restored and the override cancelled.