Features: Current Induction Switches (CIS) are designed to monitor or detect the current of electrical equipment safely, simply and conveniently. Based on the principle of electromagnetic mutual inductance of current and advanced passive power supply (only for AC) technology, the switch output detection, monitoring, protection and alarm products are developed. Control of various automatic industrial control equipment, flash, buzzer, relay, single chip, or other power load equipment Compared with traditional transformer and thermal protector, it has the advantages of high accuracy, stable performance and long service life. Ideal choice for automatic industrial control equipment and electric power monitoring. Widely used in substation, frequency control device, inverter device, electrolytic plating, electric locomotive, street lamp monitoring, coal mine and other need current monitoring automation industry. Specification: Switch Type:Normally Open/Normally Closed(Optional) Power Supply:10~30VDC Starting Current Range: 1-200A Startup Time: <0.1 Seconds Switch Contact Capacity: Maximum: 0.5A@12-240VAC/DC Overload Capacity: +100%@30A Threading Hole Diameter: 19.5mm Indicator Light: Red and Green Installation Form: Flat Installation Shell Material: Fireproof ABS Working Temperature: -20~55 °C Working Humidity: 0-90%, No Condensation IP Rating: IP30 Size:80 x 70 x 26mm / 3.15 x 2.76 x 1.02in Package List: 1 x Sensing Switch 1 x Users Manual(Chinese&English) .