{"product_id":"terasaki-at12-1250a-660v-3-pole-air-circuit-breaker","title":"Terasaki AT12 1250A 660V 3 Pole Air Circuit Breaker for Industrial and Commercial Power Distribution","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Terasaki AT12—a rugged, high-capacity 3-pole air circuit breaker designed to safeguard industrial and commercial power distribution. With a 1250 A current rating and a 660 V operating range, this unit delivers dependable protection and swift switching for demanding electrical systems.\u003c\/p\u003e \u003ch2\u003eWhy the Terasaki AT12 stands out\u003c\/h2\u003e\n\u003cp\u003eThe AT12 combines robust construction with thoughtful protection features tailored for modern facilities. Its air circuit breaker design provides reliable interruption during fault conditions while enabling straightforward maintenance and long service life in tough environments. Key advantages include:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration\u003c\/strong\u003e ensures synchronized protection across all three phases, reducing the risk of unbalanced faults and damage to equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1250 A current rating\u003c\/strong\u003e supports large main feeders and high-load circuits typical of industrial and commercial power distribution.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e660 V voltage rating\u003c\/strong\u003e aligns with common low-voltage distribution networks, enabling versatile integration into existing switchgear and panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAdjustable trip settings\u003c\/strong\u003e for precise protection coordination with downstream devices, helping minimize unnecessary outages while maintaining safety.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh interruption capacity\u003c\/strong\u003e designed to quickly clear faults, protecting transformers, motors, and sensitive downstream equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLow-maintenance design\u003c\/strong\u003e suited for installations where reliability and durability are critical, reducing time and cost of servicing.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTypical applications\u003c\/h2\u003e\n\u003cp\u003eThe Terasaki AT12 is ideal for use as main incoming feeders, switchboards, and critical power distribution paths in large facilities. It excels in environments where high power availability is essential and fault protection must be fast, reliable, and easy to coordinate with other protective devices.\u003c\/p\u003e \u003ch2\u003ePerformance in practice\u003c\/h2\u003e\n\u003cp\u003eWhen your systems demand decisive protection without sacrificing uptime, the AT12 delivers. The 3-pole configuration enables synchronized tripping across all phases, helping prevent miscoordination that could leave parts of a system exposed. The combination of a robust air interrupter and adjustable trip settings means you can tailor protection to match the specific electrical layout of your plant or building, reducing nuisance trips while preserving safety and system integrity.\u003c\/p\u003e \u003ch2\u003e installation and practical considerations\u003c\/h2\u003e\n\u003cp\u003eFor optimal effectiveness, install the AT12 in well-ventilated switchgear designed for industrial and commercial use. Ensure proper electrical clearances and secure terminal connections, then configure the trip settings to align with downstream protection devices. Regular inspection of the breaker mechanism and contact wear will extend service life and maintain reliable operation through years of service.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eBottom line\u003c\/strong\u003e: The Terasaki AT12 1250 A, 660 V, 3-Pole Air Circuit Breaker is purpose-built for demanding power distribution environments. It delivers robust, coordinated protection for main feeders and switchboards, with the flexibility of adjustable trips and a design that stands up to the rigors of industrial use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Terasaki","offers":[{"title":"Default","offer_id":46390475489442,"sku":"AT12","price":14138.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_8f74d2a7-1f6c-4ac8-9280-dde9de52aeab.png?v=1765373636","url":"https:\/\/www.ampstate.com\/products\/terasaki-at12-1250a-660v-3-pole-air-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}