Inrush current | NETIO products: Smart power sockets controlled over LAN and WiFi
For a brief time after being switched on, AC (110/230V) electrical appliances often draw a much higher current than in normal operation. This inrush current is different for different types of devices (LED lightbulbs, heaters, switching power supplies for PC/servers).

For example, a 580W ATX computer power supply (2.5A rated input current) may draw several times more for a few ms after power-up. For the 2.5A rating, the peak consumption may reach 8A to 60A! For details, see: http://www.tomshardware.com/charts/120v-desktop-power-supplies/Inrush-Current,2565.html?_ga=1.66345518.1078295973.1482763161

NETIO smart sockets work well with common appliances and with circuit breakers that are commonly used to protect outlet circuits. Switching a significant load or two sockets at once may, for a short time, lead to overcurrent and trip the circuit breaker which then needs to be manually switched back on. 

When the power is restored, there is a risk that the circuit breaker trips again. The Sequential switching function is designed to protect against this circuit breaker tripping when too many devices are switched on at the same time.
To switch electric motors and other devices with a large inrush current, we recommend using contactors instead of using NETIO sockets directly.

Caution: When switching sockets with your application and M2M API, please respect the need to switch on some appliances one by one and not all at once. Otherwise, circuit breakers may trip.

 

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