277/480 VAC 3-Phase Wye, Surge Panel with Replaceable Surge Modules: 7277 (3) & 8320-GN (1), NEMA 12 Enclosure, UL 1449 3rd Edition Compliant

277/480 VAC 3-Phase Wye Surge Panel with Replaceable Surge Modules - Leviton Surge Protection The Leviton 277/480 VAC 3-Phase Wye Surge Panel with Replaceable Surge Modules (Model 57277-M3) is a robust surge protective device designed for commercial and industrial electrical distribution systems. It provides transient surge voltage protection specifically for 3-phase Wye electrical systems, making it suitable for branch panel and service entrance applications. This surge panel is housed in a NEMA 12 rated enclosure, ensuring protection against dust, dirt, and light splashing water, suitable for indoor environments. It is UL 1449 3rd Edition compliant, meeting rigorous safety and performance standards required by electrical distributors, lighting solutions providers, wire and cable specialists, and switchgear suppliers. Specifications Voltage: 277/480 VAC, 3-Phase Wye Frequency: 50/60 hertz Nominal Discharge Current (IN): 20 kA per mode Maximum Surge Current: 150 kA per mode (150 kA total per phase) Voltage Protection Rating (VPR): L-N 1000V, L-G 1500V, N-G 800V, L-L 1500V Connection Type: Feed-Through Dual Wire Terminal Block, accepts up to #3 AWG wire Enclosure Type: NEMA 12, powder coated steel Operating Temperature: -20 to 40 degrees Celsius Flammability Class: Rated V-2 per UL 94 Agency Certification: cULus Listed Type 2, UL 1449 3rd Edition compliant Replacement Modules: Yes, replaceable surge modules 7277 (3) & 8320-GN (1) Product Weight: 23 lbs Features High-performance transient surge voltage protection for all phases in a 3-phase Wye system Replaceable and modular surge protection components simplify maintenance and reduce downtime Parallel-operated design ensures continuous power even if a surge module is disabled or removed Real-time protection status LEDs and audible alarms for diagnostic monitoring Dry contacts for remote monitoring and integration with building management systems Powder-coated steel enclosure with NEMA 12 rating for indoor industrial environments UL 1449 3rd Edition certified and cULus listed for safety and compliance Compatible with copper or copper-clad wire per installation guidelines Downloads & Links Instruction Sheet - French Product Brochure