Square D Surgelogic Surge Protection Device, 320kA, NEMA 4X, 480Y/277 VAC

Square D Surgelogic Surge Protection Device, 320kA, NEMA 4X, 480Y/277 VAC

The Square D Surgelogic surge protection device delivers a 320 kA surge current rating for 480Y/277 VAC, 3 phase, 4-wire electrical systems in a rugged NEMA 4X stainless steel enclosure. Rated for a 150 A line current with a 320 V maximum continuous operating voltage (Uc) and a 20 kA nominal discharge current, this Type 1 SPD configuration is built for demanding commercial and industrial power protection where fault current withstand and enclosure durability both matter. An integrated switch-disconnector with off/on/automatic modes provides safe, code-compliant isolation for service and maintenance.

Key Features

• Surge Current: 320 kA surge current rating with a 200 kA short circuit protection rating and 20 kA nominal discharge current for robust transient suppression.
• Durable Construction: Stainless steel NEMA 4X enclosure resists corrosion and washdown for demanding indoor/outdoor environments.
• Type 1 SPD Configuration: Fuse technology manages thermal and high-current events for reliable long-term operation.
• Voltage & Wiring: Rated 480Y/277 VAC, 3 phase, 4-wire, with a 320 V maximum continuous operating voltage (Uc) and 150 A line rated current.
• Switch-Disconnector: Integrated switch-disconnector with off/on/automatic modes plus an alarm enable/disable switch for controlled isolation.
• Local Signalling: Green LED per phase for normal operation and red LED per phase for fault indication, plus dry contacts and a surge counter for remote monitoring.
• Connections: Lugs accept AWG 10 through AWG 3/0 copper conductors, torqued to 4 N.m.

Certifications & Compliance

• UL 1283:ed. 5
• UL 1449:ed. 4
• CSA C22.2 No 8
• NEMA 4X Rated Enclosure
• Mercury Free

Technical Specifications

• Mercury Free: Yes
• ROHS Eur In Scope: Yes
• Number Of Poles: 3
• Line Rated Current: 150 A
• Phase: 3 phase
• Device Type: Surge Protection and Power Conditioning - Surge Protection Devices

Typical Applications

• Commercial and Industrial Electrical Distribution
• Panelboard and Service Entrance Surge Protection
• Outdoor and Washdown-Rated Installations (NEMA 4X)
• Remote Monitoring and Alarm Signaling Applications

Why Square D?

Square D backs the Surgelogic line with a stainless steel NEMA 4X enclosure, UL 1283 and UL 1449 listings, and CSA C22.2 No 8 compliance for dependable, code-compliant surge protection in demanding electrical environments. Local LED signalling, dry contacts, and a surge counter give facility teams the visibility needed to maintain uptime and protect connected equipment.