{"product_id":"siemens-3va5120-4ec31-0aa0","title":"Siemens 3VA5120-4EC31-0AA0 0A 3-Pole 3 V Circuit Breaker Potential Transformer","description":"\u003cdiv\u003e\u0026lt; p\u0026gt;Introducing the Siemens 3VA5120-4EC31-0AA0, a purpose-built three-pole 3-volt circuit breaker potential transformer designed to integrally support protection and metering within Siemens electrical gear. This specific variant is configured for three-phase voltage sensing across all poles, delivering the reliable signals protection relays rely on to coordinate fast, accurate tripping in fault scenarios. The current rating is specified as 0 A for this part instance, making it a precise, application-specific component within the Siemens 3VA ecosystem. \u0026lt; \/p\u0026gt; \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 3VA5120-4EC31-0AA0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\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\n\u003c\/ul\u003e \u003ch3\u003eWhy this Siemens potential transformer stands out\u003c\/h3\u003e\n\u003cp\u003eUnlike generic voltage sensing options, this transformer is purpose-built to slot into Siemens protection configurations, ensuring seamless compatibility with the 3VA protection and control family. Its 3-pole design guarantees synchronized voltage sensing across all phases, which is essential for accurate relay operation and stable protection trapezoids in demanding electrical environments. With a compact form factor and Siemens-engineered tolerances, you can expect dependable performance in panelboard assemblies, switchgear banks, and retrofit projects that demand exacting PT ratios and phase alignment.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacement or spare for Siemens 3VA-based protection schemes in industrial or commercial power systems.\u003c\/li\u003e \u003cli\u003ePart of preventive maintenance routines to minimize downtime in critical infrastructure where accurate voltage sensing matters.\u003c\/li\u003e \u003cli\u003eApplied in retrofit projects to maintain compatibility with existing Siemens metering and protection relays requiring a 3 V, three-pole sensing element.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical considerations and integration tips\u003c\/h3\u003e\n\u003cp\u003eWhen planning integration, verify that the system’s protection strategy calls for a three-pole, 3 V potential transformer with the specific part number 3VA5120-4EC31-0AA0. Its design supports straightforward wiring within Siemens protection panels, helping to reduce wiring complexity and potential signal errors. This transformer is optimized for reliable operation within standard Siemens low-voltage switchgear environments, contributing to precise fault detection and improved overall system reliability.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 3VA5120-4EC31-0AA0\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\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\n\u003c\/ul\u003e \u003cp\u003eFor engineers building or maintaining Siemens-based protection architectures, this 3-pole, 3 V circuit breaker potential transformer offers a precise, compatible solution that supports accurate protection signaling, streamlined installation, and dependable performance in critical electrical networks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46423173890210,"sku":"3VA5120-4EC31-0AA0","price":1872.0,"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\/siemens-3va5120-4ec31-0aa0","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}