Technology

Powerline Communicated Load Control technology was invented to inexpensively control room lighting for retrofit or new construction by a novel approach that signals commands via the room wiring system to dim or switch the lights, whether LEDs or fluorescents. PCLC involves no new wiring, is easy to install and sends commands from a transmitter in the wall switch box or from the electric panel over the existing electric wires in the room. A receiver in each luminaire executes the commands to dim or switch the lights. The signaling by a simple toggle switch goes along the electrical wires for their entire length. The occupancy/vacancy and daylight harvesting sensor operate independently and automatically respond to the conditions in the room, gym, auditorium lunchroom conference room, etc. No re-commissioning is ever necessary. If the load has power, the transmitter or sensor will control it. There are no batteries to replace, no RF noise, no networks to maintain and since the PCLC transmitter is not on the internet, the system can’t be hacked. If there is a building automation system in the building, the lighting does not need to be connected to it because the lighting loads have been so severely reduced that it will not pay to monitor the lighting cost in the monthly electric bill.

If Demand Response (DR) or Automated Demand Response (ADR) is mandated by code, it can be implemented at the electric panel and communicated to the receiver. Then the lighting loads can be dimmed and non-essential plug loads dropped, in response to a request from the utility or a desire to avoid excessive peak demand charges.

PCLC can be interfaced with new or existing 0-10v dimming systems, and installation costs can be further reduced by integrating PCLC into LED drivers or fluorescent ballasts, and embedding the receivers and sensors in the luminaires themselves at the factory for new construction installation. In a retrofitting project, the sensors can be located on the tees or on the ceiling adjacent to the luminaires and connected to the receivers in the existing luminaire’s ballast compartment.

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