{"product_id":"siemens-3va5120-5ec31-0aa0","title":"Siemens 3VA5120-5EC31-0AA0 0A 3-Pole 3 V Circuit Breaker Potential Transformer","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens 3VA5120-5EC31-0AA0 — a compact, three-pole circuit breaker potential transformer engineered for precise voltage sensing in three-phase protection schemes. Built to integrate with Siemens protection relays and switchgear, this module delivers reliable secondary voltage signaling directly from the breaker assembly, streamlining installation and maintenance.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration:\u003c\/strong\u003e Supports balanced voltage sensing across all three phases for accurate protection and monitoring.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating: 3 V\u003c\/strong\u003e — designed to provide the necessary secondary voltage to relay inputs without introducing external components.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating: 0 A\u003c\/strong\u003e — optimized for measurement\/sensing circuits rather than carrying load current, reducing thermal and wiring concerns in control panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number clarity:\u003c\/strong\u003e Siemens 3VA5120-5EC31-0AA0 ensures straightforward replacement and maintenance within the Siemens 3VA ecosystem.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIntegrated protection signaling:\u003c\/strong\u003e Simplifies the protection chain by combining breaker functionality with a dedicated potential transformer, reducing wiring complexity and panel space.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this device stands out\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eStreamlined installation\u003c\/strong\u003e — fewer components to route, fewer connections to fault, and plug-in compatibility with Siemens 3VA equipment for faster commissioning.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliability in demanding environments\u003c\/strong\u003e — Siemens engineering ensures consistent voltage sensing in industrial switchgear, data centers, and power distribution panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDesigned for protection accuracy\u003c\/strong\u003e — accurate secondary voltage supports protective relays and metering devices, enabling timely fault detection and safer operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIdeal for retrofits and new builds\u003c\/strong\u003e — whether upgrading existing Siemens gear or outfitting a new panel, this 3-pole 3 V transformer module fits seamlessly into the protection strategy.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical use cases\u003c\/p\u003e \u003cul\u003e \u003cli\u003eThree-phase switchgear and motor control centers requiring reliable voltage sensing for upstream protection relays.\u003c\/li\u003e \u003cli\u003eRetrofits where reduced wiring and compact design simplify panel modifications without sacrificing protection accuracy.\u003c\/li\u003e \u003cli\u003eData centers and critical facilities that depend on precise voltage monitoring to prevent unnecessary outages and to support stable power quality.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eHow this compares to separate sensing solutions\u003c\/p\u003e \u003cul\u003e \u003cli\u003eConsolidates breaker function with a dedicated potential transformer, reducing the number of external devices and connections.\u003c\/li\u003e \u003cli\u003eEliminates the need for additional mounting space and separate PVTs, delivering a cleaner, more maintainable protection scheme.\u003c\/li\u003e \u003cli\u003eOffers Siemens-validated compatibility, minimizing integration questions and accelerating onboarding in legacy or modern installations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eSpecifications at a glance\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePole count:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 3 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 0 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart:\u003c\/strong\u003e 3VA5120-5EC31-0AA0\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIf you’re configuring or upgrading a Siemens protection scheme, the Siemens 3VA5120-5EC31-0AA0 0A 3-Pole 3 V Circuit Breaker Potential Transformer offers a precise, space-efficient solution that aligns with Siemens’ reliability and protection philosophy. It’s a purpose-built component for accurate voltage sensing, streamlined installations, and dependable performance in critical electrical environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46423173791906,"sku":"3VA5120-5EC31-0AA0","price":2396.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-3va5120-5ec31-0aa0-0a-3-pole-v-circuit-breaker-potential-161.webp?v=1789278760","url":"https:\/\/www.ampstate.com\/products\/siemens-3va5120-5ec31-0aa0","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}