Woodward LS 4 Circuit Breaker Control & Protection

In complex switchgear applications the LS 4 can help to simplify the issue. Together with the GCP-31 genset controls the LS 4 offers a simple technical solution.

Each breaker to be controlled is equipped with one LS 4 that measures the three-phase voltage on each side of the breaker. Each side of the breaker is designated as either a fixed (utility) or variable (genset) source and is labeled A or B. So the LS 4 can be used to control utility feeder breakers with one fixed source and one variable source, or tie breakers between busses with two variable sources. The LS 4 is used for breaker protection, synchronization, and load control.