- High Quality: This protective base features a guide rail design with two M4 screw hole structures, allowing for easy installation either separately or directly onto HT35 guide rails. For direct installations, make sure to attach accessories on both sides at the bottom. - Excellent Performance: Designed for error detection in AC systems operating at 50/60 Hz and rated voltages up to 460 V. It provides reliable relay protection for three-phase power supplies against overvoltage, undervoltage, phase failure, phase reversal, and unbalanced voltage conditions. - Practical Size: Dimensions are 79 x 23 x 79 mm (3.11 x 0.91 x 3.11 inches). It supports insulated copper wires with a carrying capacity of 1.0 to 2.5 mm. A single copper wire can be directly inserted into the terminal, but pin connectors are required for a secure connection. - Versatile Applications: This voltage protection device is ideal for use in various industrial settings, including air compressors, motors, distribution boxes, pumps, central air conditioners, electrical control boxes, distribution cabinets, and cranes. It is essential for maintaining the normal operating voltage in industrial systems. - Key Benefits: Protects equipment from voltage irregularities, ensuring longevity and reliability. Its compatibility with multiple voltage levels and straightforward installation process make it a practical choice for industrial applications.