Crompton Sync Check Relay

The range offers both traditional and technologically advanced products including single parameter units earth leakage protection ground fault relays vector shift and rocof and microprocessor system protection relays.

Crompton sync check relay. Connecting two electrical systems that are not closely matched can cause expensive damage and disturbance to the electrical. If the two supplies are not synchronised the relay operates to provide a control output. The synchro check relay can be used to assist in the semi automatic parallelling of two ac power systems. The synchro check paralleling protector trip relay compares the voltage frequency and phase angle of two supplies and operates a relay according to the state of synchronisation of the supplies.

The volt free relay contacts change state when the voltage level phase relationship and frequency are within the selected synchronising limits. The relay will de energise again and the led will go off when the bus. Trip relays continuously monitor and protect any electrical parameter within a set point limit. Various dc models provide protection of battery and ups systems and a range of temperature protection products is ideal to prevent the damaging effects of overheating.

The relay output can be used for alarm or control purposes. Syncro check and under over speed trip relay functions. With dead bus on if the bus voltage falls below the udbon level the relay energises and the dead bus led lights. The volt free relay contacts change state when the voltage level phase relationship and frequency are within the selected synchronising limits.

Operate the relay de energises and the sync led goes off. Crompton instruments protector trip relays energy division.