{"product_id":"time-mark-corporation-2501-120-three-phase-power-monitor","title":"Time Mark Corporation 2501-120 Three-Phase Power Monitor","description":"\u003ch3 data-section-id=\"17lc1ru\" data-start=\"0\" data-end=\"16\" class=\"PDq2pG_selectionAnchorContainer\"\u003eDescription:\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp data-start=\"17\" data-end=\"658\"\u003eThe Time Mark Corporation 2501-120 3-Phase Power Monitor is designed to continuously monitor 120 VAC three-phase power systems for phase loss, phase reversal, undervoltage, and voltage unbalance to protect motors and industrial equipment. Commonly installed in motor control centers, HVAC systems, pumps, compressors, conveyors, and manufacturing equipment where dependable three-phase power monitoring is essential. Maintenance teams, OEMs, and system integrators use the 2501-120 for replacement, repair, retrofit, and preventive maintenance to minimize equipment damage and reduce unplanned downtime. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"660\" data-end=\"677\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"678\" data-end=\"1310\"\u003eThe Time Mark Corporation 2501-120 is a solid-state three-phase power monitor that continuously supervises three-phase WYE or DELTA power systems without requiring a neutral connection and de-energizes its output relay when phase loss, phase reversal, undervoltage, or voltage unbalance conditions are detected. It is widely used in industrial automation systems, water and wastewater facilities, motor control panels, compressors, conveyors, HVAC equipment, and process machinery where reliable three-phase power monitoring helps prevent costly equipment failures and production interruptions. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1312\" data-end=\"1341\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1342\" data-end=\"2244\"\u003e• Manufacturer: Time Mark Corporation\u003cbr data-start=\"1379\" data-end=\"1382\"\u003e• Manufacturer Part Number (MPN): 2501-120\u003cbr data-start=\"1424\" data-end=\"1427\"\u003e• Product Type: 3-Phase Power Monitor\u003cbr data-start=\"1464\" data-end=\"1467\"\u003e• Nominal Voltage: 120 VAC\u003cbr data-start=\"1493\" data-end=\"1496\"\u003e• Voltage Adjustment Range: 84–114 VAC\u003cbr data-start=\"1534\" data-end=\"1537\"\u003e• Frequency: 50\/60 Hz\u003cbr data-start=\"1558\" data-end=\"1561\"\u003e• Voltage Unbalance Adjustment: 2–10% (per NEMA specifications)\u003cbr data-start=\"1624\" data-end=\"1627\"\u003e• Trip Delay: Adjustable 1–10 Seconds\u003cbr data-start=\"1664\" data-end=\"1667\" data-is-only-node=\"\"\u003e• Power Consumption: 4.5 W per Phase\u003cbr data-start=\"1703\" data-end=\"1706\"\u003e• Output Contacts: SPDT, 30 A at 28 VDC\/300 VAC, 5 A at 480\/600 VAC (0.75 PF)\u003cbr data-start=\"1783\" data-end=\"1786\"\u003e• Reset Type: Automatic\u003cbr data-start=\"1809\" data-end=\"1812\"\u003e• Repeat Accuracy: ±1% Full Scale\u003cbr data-start=\"1845\" data-end=\"1848\"\u003e• Reset Time: 150 ms Nominal\u003cbr data-start=\"1876\" data-end=\"1879\"\u003e• Dead Band: 2% of Full Scale\u003cbr data-start=\"1908\" data-end=\"1911\"\u003e• Mounting: Surface Mount\u003cbr data-start=\"1936\" data-end=\"1939\"\u003e• Enclosure Material: ABS Plastic\u003cbr data-start=\"1972\" data-end=\"1975\"\u003e• Operating Temperature: -4°F to +131°F (-20°C to +55°C)\u003cbr data-start=\"2031\" data-end=\"2034\"\u003e• Certifications: UL Listed to U.S. and Canadian Safety Standards\u003cbr data-start=\"2099\" data-end=\"2102\"\u003e• Application: Three-phase motor, compressor, pump, HVAC, conveyor, and industrial equipment protection. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2246\" data-end=\"2270\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2271\" data-end=\"2330\"\u003e• Time Mark 2501D-120\u003cbr data-start=\"2292\" data-end=\"2295\"\u003e• Time Mark 257B\u003cbr data-start=\"2311\" data-end=\"2314\"\u003e• Time Mark 258B\u003c\/p\u003e","brand":"TIME","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51714028470574,"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_2039a01f-1af4-42ea-a576-735a0df7f599.jpg?v=1770414242","url":"https:\/\/plgautomation.com\/products\/time-mark-corporation-2501-120-three-phase-power-monitor","provider":"PLG Automation ","version":"1.0","type":"link"}