Embedded excitation card SYN5302-0277

Single or dual-channel? Not every synchronization system necessarily needs to be structured according to the above pattern. The SYNCHROTACT single-channel synchronization units offer a high degree of security and are often used in practice.

However, security can be further increased to a significant degree by means of dual-channel systems. It is unlikely that the two channels, which are structured differently in both hardware and software terms, will have the same malfunction simultaneously.

The extra cost of a dual-channel system frequently bears a profitable relationship to the possible consequential costs arising from incorrect paralleling. Second, redundant synchronizing system? Often, two redundant synchronizing systems are installed in a plant so that, in the event of failure of one system, it is possible to switch over to the other and thus increase availability.

The second system is often designed for manual synchronizing with or without synchrocheck. In addition to this solution, with SYNCHROTACT® 5 ABB offers two automatic dual-channel systems in a single casing, thus allowing manual synchronization to be dispensed with. The advantages of this solution:

• No engineering and wiring costs for the second system

• Further increased security since all four output contacts are normally operated in series

• No problems with synchronization in cases where the manual synchronizing system is very seldom used