{"product_id":"square-d-fa321001021","title":"Square D FA321001021 100A 3-Pole 240 V Circuit Breaker Potential Transformer","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D FA321001021 100A 3-Pole 240 V Circuit Breaker Potential Transformer—designed to deliver precise protection and streamlined monitoring for your 3‑phase electrical systems. This device combines a robust 100 A circuit breaker with a potential transformer interface, making it a practical choice for industrial and commercial panels that require accurate electrical sensing alongside reliable overcurrent protection.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey specifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eCurrent rating: \u003cstrong\u003e100 A\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003ePoles: \u003cstrong\u003e3\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eVoltage rating: \u003cstrong\u003e240 V\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003ePart number: FA321001021\u003c\/li\u003e \u003cli\u003eBrand: Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this 3-pole design matters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eProtects all three phases simultaneously, preventing imbalances that can damage motors, drives, and other 3-phase equipment.\u003c\/li\u003e \u003cli\u003eIdeal for 3‑phase distribution in commercial and light industrial environments where reliable trip coordination is crucial.\u003c\/li\u003e \u003cli\u003eBuilt to integrate with standard Square D panels and compatible protection relays, simplifying installation and maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePotential Transformer integration for smarter protection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eIncludes a potential transformer interface to support accurate voltage and current sensing, enabling better metering, monitoring, and relay coordination within your protection scheme.\u003c\/li\u003e \u003cli\u003eHelps facilities track load conditions and detect anomalies before they impact uptime, improving overall system reliability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eIdeal applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e3‑phase motor circuits (pumps, compressors, conveyors) up to 100 A\u003c\/li\u003e \u003cli\u003eHVAC distribution, processing equipment, and other 3‑phase loads in commercial settings\u003c\/li\u003e \u003cli\u003ePanel boards and electrical rooms where precise protection and monitoring are required\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat sets it apart from alternatives\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUnified protection and sensing solution tailored for Square D ecosystems, reducing parts complexity and improving compatibility.\u003c\/li\u003e \u003cli\u003eThree-phase coordination that minimizes nuisance trips and supports reliable equipment operation in dynamic load environments.\u003c\/li\u003e \u003cli\u003eDesigned for straightforward integration with protective relays and metering setups, helping you build a more observant electrical distribution system.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical tips for deployment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eVerify compatibility with your existing Square D panels and labeling to ensure a seamless fit.\u003c\/li\u003e \u003cli\u003ePlan for proper wiring topology to maintain clean phase-to-neutral and phase-to-ground paths, maximizing protection effectiveness.\u003c\/li\u003e \u003cli\u003ePair with appropriate protection relays and metering equipment to leverage the potential transformer interface for enhanced visibility.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn environments where reliable 3‑phase protection and accurate electrical monitoring are non‑negotiable, the Square D FA321001021 100A 3-Pole 240 V Circuit Breaker Potential Transformer offers a focused, compatible solution. Add this trusted component to your electrical distribution strategy and safeguard critical loads with confidence.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423111205026,"sku":"FA321001021","price":1802.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/square-d-fa321001021","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}