- Superior performance: The dual power changeover switch checks that main and standby power are operating as expected. If a fault is detected in the main supply, the standby power is activated immediately to ensure an uninterrupted, reliable, and safe power supply. - Easy installation: Compact design for straightforward 35 mm DIN rail mounting. Standard 35 mm rail compatibility and specifically designed for the PZ30 distribution box. - Wide applications: Suitable for backup power systems at 50/60 Hz and 220 V. Ideal for factories, shopping centers, seedling farms, and any location that requires stable power. - Robust construction: Made of flame-retardant PC plastic that withstands high temperatures and aging. Includes a connection protection cover to improve conductivity and extend life. - Use scenarios: In a manufacturing facility to prevent production downtime during mains faults; in a shopping center to maintain lighting and security systems during grid disturbances; in a seedling farm to protect climate control and irrigation during power outages.