Delayed (sequential) switching on of electrical outlets | NETIO products: Smart power sockets controlled over LAN and WiFi
110/230VAC sockets in a standard electrical wiring are protected with circuit breakers (or fuses) against short circuit or overload. When there is a power outage, circuit breakers sometimes trip when the power is restored if there are too many appliances with a switching power supply connected to the same circuit breaker. See Inrush current.

Usually, the main problem for IT equipment is not the power outage itself but the circuit breakers tripping when the power is restored. This problem can be solved with sequential switching of electrical appliances when the power is restored.

 

In the context of NETIO products

The Global Outputs PowerUp interval setting allows to switch on electrical output(s) sequentially, with a delay defined by this variable, whenever the NETIO smart sockets device is powered up.

After power-up, individual outputs of the NETIO device are switched on one by one (the default delay is 2000 miliseconds between sockets).

Of course, this applies only to sockets (out of the 4 sockets on the NETIO 4x device) that should actually be switched on. The delay can be turned off by setting this variable to 0. To prevent circuit breakers from tripping, we do NOT recommend reducing the switching delay to zero.

 

The delayed (sequential) switching only applies when the device is restarted. It does not apply to M2M API protocols; some protocols let you turn on all sockets at exactly the same time with a single command.

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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