The LS 4 is an intelligent synchronizer and protection device capable of

measuring voltage and current though integrated measuring inputs.

It can calculate set point values using internal software routines (i.e.

for synchronization) and can transfer these set point values to a lower

level GCP control unit using the integrated CAN bus (Guidance Level). 

The LS 4 is also capable of closing the connected breaker at the

synchronous point. Additionally the measured/calculated values may

be monitored for exceeding/falling below a predefined set point result

ing in an automatic opening of the connected circuit breaker.