Figure 1 provides suggested settings for generator sync check relays.
Sync check relay settings.
The proposed default angles are 5 degrees advance and 5 degrees late.
If the measured angle has met this criteria for the time period defined by the front panel time delay setting the sync output contact closes.
Go to check synch menu and make system split enable and make the angle 90 degree e g.
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Figure 1 synchronizing check relay settings.
The volt free relay contacts change state when the voltage level phase relationship and frequency are within the selected synchronising limits.
Sync check relay supervision automatic synchronizer matches v and f and closes.
Sync check parameters typical settings regions modify for particular requirements rotating machines bus to bus parameter typical value voltage difference 10 15 v phase slip angle 0 30 slip.
Ffi sync check logic enabled no.
Synd connection diagram function diagram 55 mm 75 mm 100 mm a1 t 4 8 6 sync delay v ϕ vdb u bus 75 u gen 75 t o o f a s t o o s l o w 2 10 8 16 12 4 20 0 4 0 8 0 6 0 2 1 0 4 2 10 synchro check relay b1 b2 12 11 24 t a2 on off ts 2x v dead bus generator type.
Then sync check verifies that this angle is less than the front panel phase angle selector setting.
Synd sync out g1 g2 21 tx l1 l2 l3 l1 l2 l3.
Sync relay contacts closed by voltage monitor logic ov exceeded sync check reclosing not enabled setting mode sw.
Connecting two electrical systems that are not closely matched can cause expensive damage and disturbance to the electrical.
The synchro check relay can be used to assist in the semi automatic parallelling of two ac power systems.
Voltage settings for sync check relays have a voltage hi and voltage lo settings.
Synchro check relay type.
1 to on permits ov h bov fixed minimum voltage limit iz zl closing enabled zone live line live bus condition only figure 2 voltage monitor acceptance zones w.
The calculations consider circuit breaker closing times and maximum allowable slip rates and determine the minimum seconds per scope revolution and the worst.
Be1 25 sync check function measures the phase angle between single phase voltages of line and bus.
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Now again to configure o p contact go to hmi of the relay and press down arrow until you.
For successful synchronization voltage frequency phase rotation and phase angle of the two sources must meet the thresholds set per the user programmable settings in the relay.
