The Lauritz Knudsen SM301 Single Phasing Preventor is a reliable supply monitoring relay designed to protect three-phase motors and equipment from electrical supply faults. It continuously monitors phase conditions and disconnects the load in case of single phasing or severe voltage imbalance, helping prevent motor overheating, breakdowns, and costly downtime.Operating across a wide voltage range of 65–415V AC, the SM301 is suitable for 3-phase, 3-wire systems commonly used in industrial and commercial installations. The built-in fail-safe design ensures that the output relay de-energizes during fault or supply failure, providing dependable protection. A 2-second ON delay prevents nuisance tripping during startup, while the 7-second OFF delay avoids unnecessary shutdowns due to brief voltage fluctuations.With 65V asymmetry sensitivity and 1 changeover (C/O) contact, the SM301 easily integrates with contactors and control circuits. It is widely used in motor protection panels, pump control panels, compressors, HVAC systems, and industrial machinery, where consistent three-phase supply is critical for safe operation.Buy Lauritz Knudsen SM301 Single Phasing Preventor online from Maheshwari Distributors – Genuine protection relay, compact design, and pan-India delivery.
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Returns may be requested within 7 days from the date the Customer receives the order, as confirmed by the delivery tracking information.
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– The item has a manufacturing defect.
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Items that are worn, used, altered, damaged after delivery, returned without their original packaging, or returned with an opened or tampered product seal will not be eligible for a return, replacement, or refund.
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