Dual power switch. PC level, no Interrupt. The dual-power automatic fer switch (ATS) is a newly developed miniature household power fer switch, is mainly used to test whether the main power or reserve power is normal. When the normal power supply is abnormal, the reserve power supply will start work immediately to ensure continuity, reliability and safety of the power supply. It is specially designed for household rail installation for PZ30 distribution box. The ATS is suitable for emergency power supply systems of AC50 or 60Hz and rated voltage 220V. It is featured with firm structure, reliable fer, easy installation and maintenance, and long life, is widely used in places where frequent power outage is not allowed. Only for city power and Generator, not for PV system and Inverter. Type: 63A / 100A size: 107 x 96 x 76mm Material: PC plastic colour: white + black Package Contents: 1 x Automatic fer Switch Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.