The SM3-5A+ Smart Three-Phase Multimeter is an advanced monitoring and protection device from Borna Electronics’ Imperial Series. More than a conventional panel meter, it combines the functionality of a three-phase digital multimeter, phase monitoring relay, and load monitoring relay in a single intelligent device.

By measuring voltage, current, and frequency using True RMS technology, recording minimum and maximum voltage values, tracking peak current, and providing comprehensive protection against electrical faults, the SM3-5A+ delivers both accurate monitoring and automatic decision-making capabilities. Its programmable control relay output makes it an ideal solution for industrial power distribution systems, motor control centers, and critical electrical installations.

Features

• True RMS measurement and display of phase and line voltages (fixed or rotating display modes)
• Recording of minimum and maximum phase and line voltage values
• True RMS measurement of phase currents with average current bargraph display
• Recording of maximum current value for each phase
• Network frequency measurement and display
• Comprehensive protection against phase loss, phase sequence reversal, voltage imbalance, undervoltage, and overvoltage
• Comprehensive protection against current imbalance, undercurrent, and overcurrent
• Selectable enable/disable function for Phase Monitoring and Load Monitoring
• Display of voltage, current, settings, and fault messages for easy monitoring
• Programmable control relay output for integration into control circuits
• Advanced monitoring and protection in a single device

Technical Specifications