{"product_id":"n8n-transformer-overload-early-warning-alert-http-api-email","title":"n8n Transformer Overload Early Warning Alert (HTTP API + Email)","description":"\u003ch3\u003eGet an early warning when transformer overload risk rises—automatically\u003c\/h3\u003e\n\u003cp\u003eThis n8n workflow checks transformer load and temperature every 15 minutes, calculates an overload risk score with a projected time-to-overload, and sends an email alert via SMTP only when the risk level is \u003cstrong\u003eHigh\u003c\/strong\u003e or \u003cstrong\u003eCritical\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRuns on a 15-minute schedule\u003c\/strong\u003e using a schedule trigger.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSets transformer metadata\u003c\/strong\u003e (Transformer ID, Substation, and Rated Capacity) for consistent downstream requests and calculations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFetches required data through three HTTP APIs in parallel\u003c\/strong\u003e:\n    \u003cul\u003e\n      \u003cli\u003eReal-time \u003cstrong\u003eload\u003c\/strong\u003e\n\u003c\/li\u003e\n      \u003cli\u003eReal-time \u003cstrong\u003etemperature\/environmental readings\u003c\/strong\u003e\n\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003e30-day historical load and incident data\u003c\/strong\u003e\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMerges the datasets\u003c\/strong\u003e into a single record, then briefly waits to buffer before analysis.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCalculates\u003c\/strong\u003e:\n    \u003cul\u003e\n      \u003cli\u003eLoad percentage\u003c\/li\u003e\n      \u003cli\u003eTemperature and trend-based subscores\u003c\/li\u003e\n      \u003cli\u003eAn overall \u003cstrong\u003e0–100 overload risk score\u003c\/strong\u003e and a \u003cstrong\u003erisk level\u003c\/strong\u003e\n\u003c\/li\u003e\n      \u003cli\u003eAn estimated \u003cstrong\u003ehours-to-overload\u003c\/strong\u003e prediction\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConditional notification\u003c\/strong\u003e: if risk is \u003cstrong\u003eHigh\u003c\/strong\u003e or \u003cstrong\u003eCritical\u003c\/strong\u003e, it waits briefly for a cooldown and then sends an \u003cstrong\u003ealert email\u003c\/strong\u003e with the risk level and score; otherwise, it ends without emailing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSaaS operators monitoring transformer health across multiple sites and needing consistent, automated threshold alerts.\u003c\/li\u003e\n  \u003cli\u003eAutomation engineers integrating SCADA\/sensor systems and historical incident trends into a proactive early warning flow.\u003c\/li\u003e\n  \u003cli\u003eAsset teams who want clear overload risk scoring and time-to-overload projections before critical conditions occur.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHTTP API integrations\u003c\/strong\u003e (3 parallel requests) with configurable \u003cstrong\u003eHTTP Header Auth\u003c\/strong\u003e and endpoint base URLs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSMTP email\u003c\/strong\u003e sending via n8n SMTP credentials (configurable from\/to and email body settings).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore n8n nodes used\u003c\/strong\u003e: if, set, code, no op, wait, merge.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTo get started, update the API base URLs\/endpoints, your HTTP header auth credentials, the SMTP settings, and the transformer ID\/substation\/rated capacity to match your asset.\u003c\/p\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45830380617907,"sku":"N8N-18248","price":56.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/VFwuZ_ADh-MBHz9sR-40__n1EMRB0e.png?v=1786698130","url":"https:\/\/buyflowscripts.com\/products\/n8n-transformer-overload-early-warning-alert-http-api-email","provider":"N8N Commerce","version":"1.0","type":"link"}