English
In order to protect a device powered from the 230V grid, you should install a surge suppressor in the control panel, which is as close as possible to the protected device; it should be SPD Type 3, e.g. the PI-k8.
The PI-k is a single-phase surge suppressor of the Type 3, in accordance with the EN 61643-11 standard, which is supplemented by
a high-frequency filter. It is manufactured in a comprehensive range for the nominal currents 8, 16, 25 and 32, intended for application in the TN-S networks. The protection is adapted for mounting on a 35mm a DIN rail. The PI-k are designed to protect single-phase electronic appliances in LV supply distribution systems against transient overvoltage and high frequency interference. They are equipped with a light indication of functioning correctly (the green light). Should there be a request to disconnect the protected circuit in case of a surge suppressor failure, there is another option, which is the Pi-k8 OFF; during a breakdown the output terminal connectors are disconnected and the power supply is interrupted.
Fig. 1. An example of connecting the surge suppressors PI-k8 – protection of the system power supply
Notes:
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Protection can be strengthened by using a max. 8 A backup fuse, or the B6A circuit breaker.