4 4.6 4.6.5 Single-axis controllers Wiring Devices in the range 145 ... 695 A (75 ... 400 kW) IT system Stop! Overvoltage on components: In case of an earth fault in IT systems, incompatible overvoltages may occur in the plant. Possible consequences: Destruction of the device. Protective measures: When using the devices in IT systems, separate the internal connection of filters to the protective earth. For this purpose carry out the device-specific measure as described. How to separate the internal connection of filters to the protective earth: 1. Remove the upper housing cover. 2. The S300 switch can be found on the Interface card. The Interface card is located in the top of the device.
– ON position: Standard operation at earthed-neutral systems (Lenze). – OFF position: Operation at IT systems. 3. Push the S300 switch into the OFF position. 94ITSW8001 4.6-28 EDS94SPP101 EN 3.1-04/2007 ON - Standard OFF - IT IF-Card-SW IF-Card-SW