DPC02DM49 is a multifunction 3-phase mains monitoring relay designed for industrial power systems operating at 440 to 480 VAC. It monitors phase loss, phase sequence, overvoltage, undervoltage, and over/under frequency conditions on both 3-wire (3P) and 4-wire (3P+N) systems. The device features two independent SPDT electromechanical relay outputs with adjustable delay functions up to 30 seconds, front-dial adjustable setpoints for voltage and frequency, and ultra-high harmonic immunity for noisy environments. With a power consumption of less than 3.5 VA and operating temperature range of -20 to 60°C, it is well-suited for industrial plants, substations, and power distribution systems requiring reliable mains supervision and automatic alarm response.