{"product_id":"westinghouse-nb2900s-circuit-breaker","title":"Westinghouse | NB2900S | Circuit Breaker | 900A | 2-Pole | 600V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Westinghouse NB2900S Circuit Breaker—a rugged, high-current protective device designed for demanding electrical environments. This 2-pole unit handles up to 900A at 600V and features a bolt-on mounting for a secure, durable connection in retrofit, maintenance, and replacement projects where exact specifications matter. Built to endure vibration and demanding service conditions, the NB2900S helps keep critical power distribution protected and operating smoothly.\u003c\/p\u003e \u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 900A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 600V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCompatibility reference:\u003c\/strong\u003e Part number NB2900S is the best reference for compatibility\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy this NB2900S stands out\u003c\/h2\u003e\n\u003cp\u003eThe NB2900S combines a robust bolt-on design with high-current capability, making it a reliable choice for service entrances, industrial panels, and heavy-duty distribution networks. The bolt-on mounting provides a solid mechanical connection that resists loosening from vibration or thermal cycling, reducing the risk of intermittent outages. With a 600V rating and 900A capacity, this breaker is suited to protect large feeders and main circuits where dependable, fast interruption is critical during fault conditions or overloads.\u003c\/p\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eRetrofit projects in industrial facilities upgrading to higher-current protection while maintaining panel compatibility\u003c\/li\u003e \u003cli\u003eReplacement installations where exact NB2900S specifications are required\u003c\/li\u003e \u003cli\u003ePrimary or main-disconnect applications in large electrical panels and service enclosures\u003c\/li\u003e \u003cli\u003eMaintenance outages that call for a like-for-like, secure, bolt-on protective device\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eInstallation, compatibility, and care\u003c\/h2\u003e\n\u003cp\u003eTo ensure a correct fit, always align the unit with the panel’s mounting pattern and confirm the ratings match your system’s requirements. Confirm fit and ratings before ordering. The part number NB2900S is the best reference for compatibility, helping you avoid mismatches in mounting, electrical characteristics, and enclosure fit. When installing, ensure proper torque on mounting hardware and verify conductor sizing and terminations meet your system’s 900A protection needs. This approach minimizes downtime and maximizes protection reliability.\u003c\/p\u003e \u003ch2\u003ePractical insights and tips\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eDocument the exact panel model and existing protection settings before replacing any breaker to streamline compatibility checks.\u003c\/li\u003e \u003cli\u003eUse the bolt-on design in panels that require a rigid, vibration-resistant connection to withstand industrial operating conditions.\u003c\/li\u003e \u003cli\u003ePlan for a maintenance window that allows verification of electrical integrity after installation, including insulation resistance and contact cleanliness.\u003c\/li\u003e \u003cli\u003eConsider pairing with appropriate overcurrent protection coordination to ensure selective tripping and minimized disruption during faults.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Westinghouse","offers":[{"title":"Default Title","offer_id":46427171848354,"sku":"NB2900S","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a0994f42-7fad-49d1-911a-c2784022b8c9.png?v=1765492979","url":"https:\/\/www.ampstate.com\/products\/westinghouse-nb2900s-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}