SYN5201 3BHB006714R0221 Synchronizing devices and systems

Synchronizing devices are widely used in power stations or industrial installations with their own power generating facilities, where the generators need to be paralleled with an island line or a public line, or in power distribution systems.
Power circuit breakers may only be closed if both voltages are approximately synchronous (coincident). Otherwise, faults in line operation, loading of the generators and, in extreme cases, damage to the generators can result.
SYNCHROTACT® 5 performs these functions safely and reliably, whether as a monitoring element for manual paralleling or as an independent fully-automatic synchronizing device.

From a synchronizing device, it is expected to close the power circuit breaker at the correct time but also that, if required, paralleling can take place whenever permissible. Although the series connection of the output contacts of two independently-functioning channels (dual-channel system), which is usual in synchronizing systems, greatly increases security against incorrect paralleling, it necessarily leads to a reduction in availability

Often, two redundant synchronizing systems are installed in a single plant so that, in the event of one system failing, the other can be used, thereby increasing availability. The second system is often designed for manual synchronizing with or without synchrocheck.
In addition, with SYNCHROTACT® 5, ABB offers two automatic dual-channel systems in a single casing, thus avoiding manual synchronizing.
Advantages of such a 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 synchronizing where the manual synchronizing system is seldom used.

SYN5201A-Z V217 3BHB006714R0217