{"product_id":"time-mark-corporation-a2644-three-phase-monitor","title":"Time Mark Corporation A2644 Three-Phase 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=\"665\"\u003eThe Time Mark Corporation A2644 \u003ca href=\"https:\/\/plgautomation.com\/collections\/safety-components\"\u003e3-Phase Monitor\u003c\/a\u003e is designed to continuously monitor 120 VAC three-phase Wye or Delta power systems for phase loss, phase reversal, and undervoltage conditions to protect motors and industrial equipment. Commonly installed in motor control centers, HVAC systems, compressors, pumps, refrigeration equipment, and manufacturing machinery where dependable three-phase power monitoring is essential. Maintenance teams, OEMs, and system integrators use the A2644 for replacement, repair, retrofit, and preventive maintenance to reduce equipment damage and minimize unplanned downtime. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5ms9th\" data-start=\"667\" data-end=\"684\"\u003eApplications:\u003c\/h3\u003e\n\u003cp data-start=\"685\" data-end=\"1258\"\u003eThe Time Mark A2644 is a solid-state three-phase monitor that continuously supervises Wye or Delta power systems and operates an internal DPDT relay when abnormal conditions such as phase loss, phase reversal, or low voltage are detected. Its adjustable trip delay minimizes nuisance trips during motor startup, while the optional restart delay is ideal for compressors and refrigeration equipment, making it well suited for industrial automation, HVAC systems, water and wastewater facilities, conveyors, pumps, and process machinery. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"5hg6bl\" data-start=\"1260\" data-end=\"1289\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cp data-start=\"1290\" data-end=\"2226\"\u003e• Manufacturer: Time Mark Corporation\u003cbr data-start=\"1327\" data-end=\"1330\"\u003e• Manufacturer Part Number (MPN): A2644\u003cbr data-start=\"1369\" data-end=\"1372\"\u003e• Product Type: 3-Phase Monitor\u003cbr data-start=\"1403\" data-end=\"1406\"\u003e• Nominal Voltage: 120 VAC (Phase-to-Phase)\u003cbr data-start=\"1449\" data-end=\"1452\"\u003e• Voltage Adjustment Range: 85–120 VAC\u003cbr data-start=\"1490\" data-end=\"1493\"\u003e• Frequency: 60 Hz\u003cbr data-start=\"1511\" data-end=\"1514\"\u003e• Phase Sensing: Phase Loss and Phase Reversal\u003cbr data-start=\"1560\" data-end=\"1563\"\u003e• Voltage Protection: Undervoltage Monitoring\u003cbr data-start=\"1608\" data-end=\"1611\" data-is-only-node=\"\"\u003e• Output Contacts: DPDT, 10 A at 240 VAC Resistive\u003cbr data-start=\"1661\" data-end=\"1664\"\u003e• Trip Delay: Adjustable 0.2–20 Seconds\u003cbr data-start=\"1703\" data-end=\"1706\"\u003e• Restart Delay: Optional Fixed 3.5 Minutes (Restart Delay Models)\u003cbr data-start=\"1772\" data-end=\"1775\"\u003e• Reset: Automatic (Manual Reset Version Available)\u003cbr data-start=\"1826\" data-end=\"1829\"\u003e• Visual Indicators: TRIP and NORM LEDs\u003cbr data-start=\"1868\" data-end=\"1871\"\u003e• Mounting: Surface Mount\u003cbr data-start=\"1896\" data-end=\"1899\"\u003e• Enclosure Material: ABS Plastic\u003cbr data-start=\"1932\" data-end=\"1935\"\u003e• Operating Temperature: -20°F to +131°F (-29°C to +55°C)\u003cbr data-start=\"1992\" data-end=\"1995\"\u003e• Humidity: 0–97% Non-Condensing\u003cbr data-start=\"2027\" data-end=\"2030\"\u003e• Certifications: UL Recognized, CSA Certified\u003cbr data-start=\"2076\" data-end=\"2079\"\u003e• Application: Three-phase motor, compressor, HVAC, refrigeration, pump, and industrial equipment protection. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 data-section-id=\"1cz0398\" data-start=\"2228\" data-end=\"2252\"\u003eCommon Replacements:\u003c\/h3\u003e\n\u003cp data-start=\"2253\" data-end=\"2312\"\u003e• Time Mark A2644M\u003cbr data-start=\"2271\" data-end=\"2274\"\u003e• Time Mark A2644R\u003cbr data-start=\"2292\" data-end=\"2295\"\u003e• Time Mark A2642\u003c\/p\u003e","brand":"Time","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":51714028634414,"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_17129610-0fa7-444a-b782-62e4b2c56a99.jpg?v=1770414247","url":"https:\/\/plgautomation.com\/products\/time-mark-corporation-a2644-three-phase-monitor","provider":"PLG Automation ","version":"1.0","type":"link"}