{"product_id":"square-d-lll36400cu31x","title":"Square D LLL36400CU31X 400A 3-Pole 600 V Circuit Breaker Potential Transformer","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D LLL36400CU31X, a purpose-built protection and monitoring solution for demanding three‑phase power systems. This 400 A, 3‑pole breaker combines robust switching with an integrated potential transformer, delivering precise voltage sensing right at the protection point. If your goal is reliable fault detection, streamlined wiring, and clean integration with modern metering and relay schemes, this unit is engineered for you.\u003c\/p\u003e \u003cp\u003eDesigned for three‑phase distribution, the 3‑pole configuration ensures balanced protection across all phases. With a 600 V rating, it covers a wide range of medium voltage distribution needs, making it a solid choice for industrial facilities, commercial campuses, and centralized power centers that require solid, dependable performance in everyday operation and during faults.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eIntegrated potential transformer:\u003c\/strong\u003e Direct voltage sensing at the breaker enables accurate metering, relay input, and protection logic without the need for separate sensing transformers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompact, all‑in‑one design:\u003c\/strong\u003e Combines protection and sensing in a single enclosure, reducing wiring complexity and saving panel space for easier installation and maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree‑phase reliability:\u003c\/strong\u003e The 3‑pole construction provides synchronized protection across all phases, important for maintaining power quality in motors, drives, and other load clusters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBroad compatibility within Square D ecosystems:\u003c\/strong\u003e Engineered to integrate smoothly with Square D panels and protection schemes, helping you streamline upgrades and retrofits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDurable for demanding environments:\u003c\/strong\u003e Built to perform in industrial settings where consistent protection and monitoring matter for uptime and safety.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUpgrading or expanding three‑phase distribution feeders in manufacturing plants and process facilities.\u003c\/li\u003e \u003cli\u003eNew installations where integrated sensing simplifies wiring and enables direct metering or relay control.\u003c\/li\u003e \u003cli\u003ePanel modernizations requiring reliable protection for heavy loads, motors, and equipment with high inrush characteristics.\u003c\/li\u003e \u003cli\u003eFacilities pursuing streamlined maintenance by reducing the number of separate components in protection schemes.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this matters in practice\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBy combining a 400 A breaker with an integrated potential transformer, the LLL36400CU31X reduces the need for additional sensing equipment, lowers wiring complexity, and accelerates commissioning. You’ll gain immediate voltage insight for protective relays and metering, improving fault detection response times and overall system visibility. This is especially valuable in environments where uptime is critical and accurate electrical measurement informs maintenance and energy management decisions.\u003c\/p\u003e \u003cp\u003eInstallers and facility engineers will appreciate the straightforward integration with existing Square D protections, helping to maintain consistency across the power system and reducing the learning curve for maintenance staff. For anyone seeking a reliable, three‑phase 600 V protection solution that also brings sensing intelligence to the panel, the Square D LLL36400CU31X stands out as a practical, performance‑driven choice.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423158587554,"sku":"LLL36400CU31X","price":37090.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-lll36400cu31x-400a-3-pole-600-v-circuit-breaker-potential-507.webp?v=1789276864","url":"https:\/\/www.ampstate.com\/products\/square-d-lll36400cu31x","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}