2SY112 Synchronising Check Relay

The 2SY112 synchronism check relay is designed to measure the phase angle between the monitored single phase voltages on the line & bus sides of a breaker & verify that this angle is less than or equal to the front panel setting. If the measured angle has met this criteria for the time period defined by the front panel setting & the voltage magnitudes meet the criteria established by the Dead Line/Bus & Min. Line/Bus settings, the output relay will be energised & the breaker permitted to close. Resetting will occur if either the phase angle or voltage magnitude stray outside the pre-set limits or if a sync. check inhibit signal is applied. Front panel mounted LED's provide visual indication of relay status & sync check function.

Features

• Local & remote dead line & dead bus selection
• Local minimum line & minimum bus selection
• Sync. check inhibit input
• 10-100 degrees phase angle
• 1-10s sync. check time delay
• Suitable for phase to neutral or phase to phase connection
• 40-300V DC auxiliary supply
• 40-275V AC auxiliary supply
• Optional 20-70V DC supply
• Solid state circuitry (except the electromechanical output relays), providing low burden on the VT
• 4M56 draw out case
• Made in Australia