This approach can minimize wiring costs by reducing the length of homeruns between control devices and the panel.
#Lighting control panel install
In a distributed configuration, very small relay-based panels (typically controlling two to four 20A circuits, see image) install closer to their controlled loads. This provides central scheduling for all panels in a hierarchical configuration. They may operate independently or be networked, with the lighting controller residing in a “master” panel and controlling connected extension panels. Multiple panels may install for control of single floors or campus buildings. In a centralized configuration, the relays reside in a centrally installed panel. Panel-based systems may be centralized or distributed. Panels are typically programmed at the panel’s frontboard, though Ethernet-based systems allow remote programming via operating software. communicate directly with other panels, computers and building automation systems (BAS).
assign schedules (without needing a physical timeclock) and custom logic (IF/THEN decision-making, called the algorithm) and.With an onboard lighting controller, the system operator can:
#Lighting control panel code
Other load control strategies: Some panels can control other building loads such as HVAC systems and dampers.Įnergy metering: Some panel-based systems meter energy consumption and upload data via Ethernet connection to a central server or the Cloud for analysis using software.īesides achieving energy savings and energy code compliance, panel-based control systems can deliver other value and benefits:Īdding a microprocessor to the panel gives the control system intelligence, allowing programming and scheduling. Plug load control: Specialized switches can turn OFF 50% of receptacles based on predicted occupancy, complying with the latest energy codes.
Other lighting control strategies: Panels can provide switching and dimming of branch circuits based on other control inputs such as switches and sensors. Scheduling: Panels can enact scheduling strategies to turn lights OFF in large public spaces when they are predictably unoccupied. As such, the panel can serve as the platform for a complete energy code-compliant lighting control system: The devices tell the switch to open or close the circuit. Low-voltage wiring connects these devices to the panel. Whether controllable circuit breakers or relays are used, the switch accepts input from control devices such as a timeclock, local switches, occupancy/vacancy sensors and light sensors. Mechanical latching operation ensures the relay will remain in the last switched state if a power loss occurs.
Typical relays are rated from 20,000 to 50,000 switching cycles, though relays are available offering up to 250,000 cycles. Three-pole relays are available but relatively costly compared to 3-pole controllable breakers. Relays are typically used to control single-pole 120/277VAC and 2-pole 208/240VAC circuits. single- and 2-pole relays will do the job and/or.a relatively small number of loads needs adding.the building has a code-compliant electrical panel already installed.Low-voltage relay-based systems can be advantageous when: This article describes common panel-based lighting control systems. It is typically sold as a new complete unit, though panelboard retrofit assemblies are available. The panel, in turn, can serve as the backbone for a complete energy code-compliant control system that responds to a wide range of control inputs for indoor and outdoor lighting control. This assembly resides in a metal cabinet-type enclosure called a panel. Remote switching concentrates switches in a central assembly that may feature intelligence, which allows programming such as scheduled ON/OFF. Switching may be local, such as a vacancy sensor turning the lights OFF in a room, or remote. This switch features a low-voltage input to accept control signals and a line-voltage output to control the load. To turn the lighting OFF automatically along a branch circuit, we must add a switch. This common-sense strategy also adds value to lighting upgrades in existing buildings. As a result, most commercial building energy codes require automatic lighting shutoff. Automating that function is the most reliable method. Turning lighting OFF when it is not being used saves energy.
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