Fast stop function

The fast stop function is a digital input on the inverter via which the inverter can be disconnected from the utility grid. It can be triggered by means of an external potential-free contact (break contact).

The inverter is equipped with 2 fast-stop inputs. Due to its response time of < 100 ms, the first input FS1 can be connected with an external monitoring unit (e.g. for grid and PV system protection), for example. The second input FS2 can be used for additional disconnection via an external switch. The reaction time there is < 1 s.

The digital input can, for example, be used to implement the grid and PV system protection as required by VDE-AR-N-4105. The inverter is suitable for grid disconnection due to its redundant and integrated interface switch. Here, the disconnection units integrated in the inverter can replace an external interface switch. An external, certified monitoring unit with an integrated potential-free PV system protection relay and an alarm contact configured as a break contact must be connected to the inverter's fast-stop input.

The fast stop function is deactivated by default and must be activated in the inverter.