<p>For professionals in the electrical engineering and automation sectors, precision and reliability are paramount when selecting a device for phase monitoring. This versatile unit is designed to meet those exacting standards with its comprehensive suite of functionalities.</p><p>Operating within a measuring range of 300-500 VAC (L-L), this device ensures robust performance under varying voltage conditions. It supports rated voltages from 300-500 VAC and accommodates a rated current of 4 A, making it suitable for diverse industrial applications. The dual frequency support at 50/60 Hz adds flexibility, allowing seamless integration into different systems.</p><p>The contact form options available are either (2) 1CO or (1) 2CO, providing adaptability based on specific control requirements. Its output type mirrors these configurations, ensuring consistency in application. Installation is straightforward with the standard 35 x 7.5 mm DIN rail mounting type, while screw terminals facilitate secure connections.</p><p>Physically compact with dimensions of just 22.5 mm in width and 85.6 mm in height, this unit is engineered to fit neatly into existing setups without demanding excessive space. Despite its size, it boasts an impressive operating time range from as quick as 0.1 seconds up to a full half-minute (30 s), catering to both rapid response needs and more prolonged operational demands.</p><p>Functionality-wise, this product excels with automatic phase sequence correction alongside overvoltage and undervoltage monitoring capabilities—essential features for safeguarding equipment against power anomalies. Furthermore, it offers phase failure detection and unbalance detection which are critical for maintaining system integrity in three-phase networks.</p><p>Durability is another hallmark; electrically rated for up to 100000 operations and mechanically capable of enduring up to an astounding thirty million cycles (30000000 operations). This speaks volumes about its longevity even under frequent use scenarios.</p><p>In terms of protection standards, the device carries an IP20 rating for general protection against dust ingress along with IP50 degree specifics ensuring reliable operation within controlled environments marked by an IP3 pollution degree classification.</p><p>Compliance with international standards like CAN/CSA C22.2 No.14, IEC/EN specifications including but not limited to IEC/EN 63000 and UL508 underscores its credibility across various regulatory landscapes—a testament to its quality assurance measures that align well with global benchmarks.</p><p>Weighing only 0.148 kg makes handling easy during installation or maintenance tasks without compromising on structural integrity or performance efficiency—attributes valued highly by technicians who prioritize ease-of-use alongside functionality.</p>