The SWT 3000 is an extremely secure and reliable system for transmitting time-critical commands via analog and digital transmission channels. This enables faults in the high-voltage network to be isolated selectively as quickly as possible. The SWT 3000 system can be integrated in the PowerLink system or be operated as a standalone system.

Security, reliability and speed of protection signal transmission is one of the central factors in the operation of high-voltage networks. The SWT 3000 system has been developed strictly in line with these requirements. For maximum operating reliability it can be configured with two separately fed power supplies (e.g., 1x AC + 1x DC) for connection to totally separate circuits. If possible, protection signals should be transmitted over two alternative communication paths to safeguard maximum transmission security. The SWT 3000 system offers a variety of different interfaces  in order to fulfill this requirement.