|Digital Energy > Protection & Control > Synchronizing Relays > SLJ Static Synchronism Check Relay|
The Type SLJ21A is a static synchronism check relay which is designed to permit closing of a breaker only if the angle between the voltages on the line and bus sides of the breaker is less than a set angle for a set period of time. Also included are two voltage measuring circuits to check line and bus voltage conditions. The relay is mounted in a size S2 drawout case.
Bus or line synchronism check
Synchronism check operation
Adjustable time delay
Adjustable phase calibration range