SACE EMAX 2 NEW LOW VOLTAGE POWER C I RCUI T BRE AKERS TO ANS I C37 / UL 1066 / CSA STANDARDS
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— Synchrocheck logics
Emax 2 is able to analyze voltage waveforms from different power sources.
Application examples Synchrocheck logics and protection are useful in the following plant-engineering situations: • During the Microgrid reconnection to the main grid, speeding up the paralleling procedure be- tween two systems with different steady states. This scenario comes after the islanding Microgrid operation. • When there is the closed transition of an auto- matic transfer switch, the main grid should be connected to the same busbar with the backup Microgrid generation in order to provide contin- uos load operation, with or without a bus-tie switching device. • This solution can also be adopted for single Gen- Set paralleling operation.
Purpose Emax 2's advanced electronics makes it the first smart unit able to island the Microgrid from distur- bances such faults or other power quality events and reconnect it to the distribution network, when the disturbance is resolved. Synchrocheck logics operate the ANSI 25A, with ad- ditional automatic re-closing capabilities based on the synchronism status detection. Using the Ekip Synchrocheck cartridge module, Emax 2 monitors the voltage amplitude, the fre- quencies and the phase displacement and realizes simple logics to adapt the Microgrid voltage and frequency to the main grid. This regulation based on up and down signals sent to the local generator controllers can be realized by Ekip Signalling con- tacts in order to achieve synchronization. The cir- cuit breaker automatically recloses when it under- stands that the synchronism is achieved using Ekip Synchrocheck and the integrated closing coil. As an alternative, Ekip Synchrocheck can send an indication signal of synchronism achieved. The cartridge module plugged-into Emax 2 works in dead or live busbsar mode, even with automatic check.
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