Selco M8100 series
The M8100 from Littelfuse is a synchroscope that produces illuminated display of the phase and frequency difference between voltages on two separate AC systems, including a generator and a busbar. This device can also display either or not the two systems on the voltage. It is possible in a version with a built-in relay for automatic closure of the circuit breaker. The product features a sturdy casing for flush-mount installation, Q96 standard, with protection class IP 52 on the front.