Relay control panels
Finalist in Lighting Controls in Consulting-Specifying Engineer's 2011 Product of the Year competition
Edited by Bettina Chang, Consulting-Specifying Engineer
The 
GreenMAX relay control panels from Leviton Manufacturing Co. Inc. afford a short-circuit current rating of 25,000 A at 277 Vac. There are latching modules for incandescent and fluorescent loads, integrated dimming and switching capabilities, and daylight and smart metering features. The system includes relay cabinets and inserts, command modules, handheld display unit, power supplies, relays, and programmable digital switches. It supports a variety of native network protocols. Each relay panel can control up to 32,000 smart relays. 
Low-voltage inputs such as occupancy sensors, photocells, and switches connect to the system via an onboard low-voltage input card or remote input cabinet.
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