The complete arrangement comprises a SICROWBAR DC overvoltage protection and de-excitation/discharge resistor.
The following device parameters that are used to select the device must be determined:
1. The firing voltage - if this is reached, then the thyristors of the SICROWBAR DC are turned-on.
2. The maximum current that flows or the maximumI2t value that occurs.
Detailed notes on the configuration, the standards that apply and the connection of the overvoltage protection are provided in the Operating Instructions, on the DVD-ROM supplied with Catalog D 23.1 or in the Internet underhttp://support.automation.siemens.com/WW/view/en/21690222/130000.
Typical load current characteristic for the three device power stages
Cooling-down time