Vari-Lite Phase Loss Sense Panel - 120/277V Power Sensing Device for Single or Three Phase Applications in Black Finish

The Vari-Lite Phase Loss Sense Panel (PLSP) is a highly reliable and versatile power sensing device designed to monitor and control power feeds in both single-phase and three-phase applications. This cETLus and UL924-listed panel offers advanced protection for lighting systems, fire alarm control panels (FACPs), and other connected devices, ensuring smooth operation during power disruptions or outages. Whether used in entertainment lighting setups or mission-critical environments, the PLSP is engineered to signal connected devices to enter their emergency state in response to a loss of power, providing immediate safety measures during such events.

With support for 120V and 277V applications, the PLSP integrates seamlessly with power systems, offering multiple input voltage options, including 120V (single-phase), 120/240V (split-phase), 208Y/120V (three-phase), and 277V (single-phase), making it suitable for a wide range of applications. The device includes three independent change-over contact outputs, each capable of controlling up to five devices per output, providing extensive flexibility for daisy-chaining various equipment such as power devices, Vision.Net-controlled devices, the Emergency Bypass Switch, and third-party contact closure devices. These outputs can be configured to suit specific operational needs, either normally open (NO) or normally closed (NC), and allow for remote control or automatic activation based on system status.

Designed for ease of use, the PLSP features a field-configurable variable delay timing system to prevent nuisance triggers and ensure stable system operation during power transitions. The adjustable delay range (0.2 - 1.2 seconds) helps avoid unnecessary system reboots, providing better reliability for both normal operations and emergency responses. For added safety, the PLSP offers an optional remote restore functionality, which allows operators to manually restore the system to its previous state, ensuring that lights or devices do not automatically return to their previous "dark" state in environments such as theatres or theme parks.

The Phase Loss Sense Panel is also equipped with helpful diagnostics for technicians. The phase indicators allow users to quickly check the power status for each phase, while the system test buttons enable physical disconnection of power by phase. This is an invaluable feature for troubleshooting and ensuring proper system functionality without needing to cut power to the entire building. The PLSP also includes an intuitive feedback system, providing clear status indications and test functions, simplifying maintenance and ensuring that users have full control over the system at all times.

With its robust and durable construction, the PLSP is designed for long-lasting performance. It is built with cold-rolled steel and features a fine-texture powder-coated black finish, making it resistant to wear and corrosion. The device is mounted using either flush or surface-mount options, with multiple mounting hole configurations to ensure flexibility during installation. Additionally, the PLSP is rated for IP20 protection, offering reliable performance in typical indoor environments.

This power sensing device is a crucial tool for ensuring the safety and stability of lighting systems and other critical equipment in the event of a power loss. With its user-friendly design, extensive configuration options, and built-in testing capabilities, the Vari-Lite Phase Loss Sense Panel provides peace of mind to users across a range of industries, including entertainment, facilities management, and emergency lighting applications.

Features

• 120V and 277V applications with support for single-phase and three-phase power systems
• Three independent change-over contact outputs for flexible control of up to 5 devices per output
• Field-configurable variable delay timing (0.2 - 1.2 seconds) to prevent nuisance triggers
• Optional remote restore functionality for manual intervention to return the system to its previous state
• Phase indicators for monitoring the power status of each phase
• Test buttons for physical power disconnection by phase for system diagnostics
• Durable, cold-rolled steel construction with a black powder-coated finish
• Flush or surface mount installation options for versatile setup
• Input voltage options: 120V (single-phase), 120/240V (split-phase), 208Y/120V (three-phase), 277V (single-phase)
• AC input current: 0.45A at 115V and 0.25A at 277V
• Overcurrent protection with a 3-pole, 5A circuit breaker for added safety
• Includes quick start guide, wire diagram, and terminal block jumpers for easy installation
• Compliant with cETLus, UL924, and other safety standards for reliable performance

Specifications

Power

• Power Sensing: Single/Split/Three-Phase
• Input Voltage: 120V (single phase), 120/240V (split phase), 208Y/120V (three phase), 277V (single phase), 480Y/277V (three phase)
• AC Input Current at 115 V: 0.45A
• AC Input Current at 277 V: 0.25A
• Overcurrent Protection: 3-pole, 5 A circuit breaker, 480Y/277V, 5kAIC
• FACP Contact Voltage: 24 VDC
• Output Contact Rating: 1A, 24 VDC

Connections

• Recommended Mains Inlet Cable Type: Conform to NEC and local regulations
• Input Contact (FACP): 3x spring-loaded
• Recommended Input Contact Cable Type: Solid core 12-18AWG
• Output Contacts: 9x spring-loaded
• Recommended Output Contact Cable Type: Solid core 12-18AWG
• Optional Remote Restore Switch: 3x spring-loaded
• Recommended Restore Switch Cable Type: Solid core 12-18AWG
• Recommended Restore Switch Type: IDEC HW1L-M1F10QD-Y-24V or similar

Features

• Output Contacts: 3x change over (CO) - "normally open" or "normally closed"
• Input Contact (FACP): 1x change over (CO) - "normally open" or "normally closed"
• Variable Delay Timing: 0.2 - 1.2 seconds
• Restore Functionality: Automatic or Manual
• Status Indicators: LED per phase (LED in enclosure for PSU)
• Test Functionality: Momentary Switch Per Phase

Physicals

• Finish: Fine texture, powder coated
• Color: Black
• Material: Cold Rolled Steel, 18 gauge

Environment

• Operating Temperature: 32-104°F (0-40°C)
• Operating Humidity: 5-95% non-condensing
• Total Calculated Heat Dissipation: 240 BTU/hr
• Relative Humidity: 20-90% non-condensing
• Ingress Protection Rating: IP20
• Cooling: Free air convection, Fanless

Dimensions

• Enclosure: 14.25 x 14.25 x 4.02 inches
• Enclosure with Cover: 14.88 x 14.88 x 4.06 inches
• Packed: 27.5 x 9 x 23.5 inches

Weight

• Net Weight: 12 lbs
• Packed Weight: Not specified

Installation

• Mounting: Flush or Surface Mount
• Mounting Holes Flush Mount: 2x Thru-hole style per side
• Recommended Mounting Hardware (Flush): 1/4" Rounded Head Fastener (not included)
• Mounting Holes Surface Mount: 4x Thru-hole style, rear
• Recommended Mounting Hardware (Surface): 5/16" Rounded Head Fastener (not included)
• Knockouts - Trade Size: 2x 1/2" and 2x 3/4"
• Ground/Earth Connection: Self-clinching stud #10, 10-32 bonding nut

Approbations

• Approvals/Listings: cETLus, FCC
• Conformity: C22#141, UL508, UL924, FCC CFR #15, ICES-003, NEMA Type 1, ANSI/UL 50/50E, DIN43880, IEC 60715

Included Items

• Quick Start Guide
• Wire diagram (in enclosure)
• 2x terminal block jumpers