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Capstone Turbine Corporation 21211 Nordhoff Street Chatsworth CA 91311 USA Technical Reference: Dual Mode System Controller (DMSC) 12. Auxiliary contacts M1-A1 open, the normally open contacts of RL7 open, TR de-energizes, contacts TR and TR (NOTC) open and contact TR (NCTO) closes. Both the ON and OFF lines of the motor operator are now de-energized, therefore, the remote disconnect device (M1) remains in the closed position. Auxiliary contacts M1-A2 close, normally open contacts RL8 close, and the MicroTurbine Grid Connect enable is pulled low (enabled). Also, the latched relay LRL1 is reset. 13. The SWITCH CLOSED lamp (LP4) illuminates, and the SWITCH OPEN lamp (LP5) extinguishes. 14. When the disconnect device (M1) closes, the MicroTurbine and protected loads are connected to the utility. At this point, protected loads are re-energized. The total time protected loads are without power is less than five seconds. 15. The LOAD POWER lamp (LP1) illuminates. 16. Once M1 closes, the Start/Stop signal is opened by auxiliary switch contact M1-A1 causing it to become inactive, and the GC Enable signal is activated through auxiliary switch M1-A2. These inputs cause the MicroTurbine to begin the reconnect sequence to Grid Connect mode while the utility grid powers the protected load. 17. The reconnect sequence to Grid Connect mode takes a minimum of 5 minutes, as specified by IEEE 1547.1 and UL 1741. The user can adjust the internal reconnect timer on the MicroTurbine to delay the reconnect sequence from 5 to 30 minutes. The MicroTurbine also has a manual reconnect function if local regulations require manual intervention before connecting a power source to the utility grid. 410071 Rev. B (January 2009) Page 53 of 71 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | TECH REF DMSC RB
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