DIN rails mounted 100A switches suits hospitals, data centers, solar systems, and refrigeration units with flame retardant ABS housing for indoor / outdoor use Adjustable parameters including startup delay ( 1s 600s), transfer delay ( 1s 600s), and under / over voltages thresholds ( 90V 140V ±5V) to safeguards sensitive electrical equipment Advanced microcontroller technology enables seamless switching between main and backup power sources like grids, generators, or solar systems during outages or voltages anomalies Features a clear LED display showing voltages and output current readings with indicators for accurate power in 100A 2P automatic transfer switches Built in protections against overcurrent, overvoltage ( 140V cutoff), and undervoltage ( 90V cutoff) with auto cutoff to equipment damage and hazards, Manufacturer: Kaeltsyn