{"product_id":"unknown-61-300-052-504-h1-current-transformer","title":"UNKNOWN 61-300-052-504 H1 CURRENT TRANSFORMER","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\"\u003eDescription:\u003c\/h3\u003e\n\u003cp data-start=\"18\" data-end=\"728\"\u003eThe UNKNOWN 61-300-052-504 H1 \u003ca href=\"https:\/\/plgautomation.com\/collections\/power-supplies-protection\"\u003eCurrent Transformer\u003c\/a\u003e is used in industrial power monitoring and protection systems to step down high primary current to a safe secondary current ratio of 800:1 for metering and relay applications. Commonly installed in switchgear, motor control centers, power distribution panels, and industrial electrical systems requiring accurate current measurement and protection. Maintenance teams, OEMs, and system integrators use this transformer for repair, retrofit, expansion, or replacement of existing current sensing and metering devices. The part is also referenced as a Siemens current transformer in surplus and industrial inventory listings. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"730\" data-end=\"747\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"749\" data-end=\"1309\"\u003eThe UNKNOWN 61-300-052-504 H1 Current Transformer is used in industrial applications requiring current measurement, power monitoring, and protective relaying. It is commonly found in switchgear assemblies, substations, motor control centers, electrical distribution systems, and heavy industrial facilities where high primary currents must be safely reduced for meters, relays, and monitoring equipment. Current transformers provide electrical isolation while maintaining measurement accuracy for industrial power systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1311\" data-end=\"1340\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1342\" data-end=\"2282\"\u003e• Manufacturer: Unknown (commonly cross-referenced to Siemens)\u003cbr data-start=\"1404\" data-end=\"1407\"\u003e• Part Number: 61-300-052-504\u003cbr data-start=\"1436\" data-end=\"1439\"\u003e• Product Type: Current Transformer (CT)\u003cbr data-start=\"1479\" data-end=\"1482\"\u003e• Function: Current sensing and isolation for metering and protection\u003cbr data-start=\"1551\" data-end=\"1554\"\u003e• Primary Current Rating: 800 A\u003cbr data-start=\"1585\" data-end=\"1588\"\u003e• Secondary Current Rating: 1 A\u003cbr data-start=\"1619\" data-end=\"1622\"\u003e• Current Ratio: 800:1\u003cbr data-start=\"1644\" data-end=\"1647\"\u003e• Terminal Marking: H1 Primary Terminal\u003cbr data-start=\"1686\" data-end=\"1689\"\u003e• Construction Type: Donut \/ Window-Type Current Transformer\u003cbr data-start=\"1749\" data-end=\"1752\"\u003e• Application: Power Monitoring and Protective Relaying\u003cbr data-start=\"1807\" data-end=\"1810\"\u003e• Compatible Equipment: Switchgear, MCCs, Distribution Panels, Protective Relays\u003cbr data-start=\"1890\" data-end=\"1893\"\u003e• Frequency: 50\/60 Hz\u003cbr data-start=\"1914\" data-end=\"1917\"\u003e• Mounting Type: Panel or Bus Bar Mount\u003cbr data-start=\"1956\" data-end=\"1959\"\u003e• System Voltage: Up to 720 V maximum (typical CT rating)\u003cbr data-start=\"2016\" data-end=\"2019\"\u003e• Test Voltage: 3 kV for 1 minute (typical industrial CT rating)\u003cbr data-start=\"2083\" data-end=\"2086\"\u003e• Designed for Industrial Electrical Systems\u003cbr data-start=\"2130\" data-end=\"2133\"\u003e• Suitable for Metering and Protection Applications\u003cbr data-start=\"2184\" data-end=\"2187\"\u003e• Industrial Grade Construction for Continuous Operation \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2284\" data-end=\"2308\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2310\" data-end=\"2497\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e• Siemens \u003ca href=\"https:\/\/plgautomation.com\/products\/siemens-61-300-053-506-current-transformer-ratio-800-0-5-ct?_pos=2\u0026amp;_sid=0dd3d85fe\u0026amp;_ss=r\"\u003e61-300-053-506\u003c\/a\u003e Current Transformer, 800:0.5 A\u003cbr data-start=\"2365\" data-end=\"2368\"\u003e• ITI 8RL-801 Current Transformer, 800:5 A\u003cbr data-start=\"2410\" data-end=\"2413\"\u003e• Hammond CT-800 Current Transformer, 800:5 A\u003c\/p\u003e","brand":"UNKNOWN","offers":[{"title":"New","offer_id":51728778723630,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_39ae72ec-14d9-47ba-a3d8-00530ff37ede.jpg?v=1770587647","url":"https:\/\/plgautomation.com\/products\/unknown-61-300-052-504-h1-current-transformer","provider":"PLG Automation ","version":"1.0","type":"link"}