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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 Application Guide: Dual Mode Controller (DMC) For MultiPac installations, interconnections between the MicroTurbine(s) must be made according to the Installation and Start-Up Manual. The Utility, Protected Loads, and MicroTurbine(s) must all be connected in a consistent phase rotation sequence. The MicroTurbine output phase sequence is L1, L2, L3. The under voltage relay will prevent Grid Connect operation unless utility phase sequence is L1, L2, L3. To support the Protected Loads in Stand Alone operation, the real power and line current requirements of the Protected Loads must be less than the real power and line current rating of the MicroTurbine (or MultiPac). Consult the Product Data Sheet(s) for the MicroTurbine(s) for the power ratings at the local temperature and elevation. The in-rush current of the Protected Loads must also be considered when sizing the MicroTurbine(s). DMC Isolation Switch Logic Conditions for Isolation Switch operation are presented as follows: Conditions to Close the Isolation Switch POWER switch (S1) is in the ON or BSTART position: AND,theMODEswitch(S2)mustbeintheAUTOorGRIDposition AND,utilityvoltagemustbewithinacceptablerangeofundervoltagerelay AND,theMicroTurbine(s)mustnotbeintheStandAloneLoadstate. Conditions to Open the Isolation Switch POWER switch (S1) must be in the OFF position: OR,theMODEswitch(S2)isinTURBINEposition OR,theMODEswitch(S2)isinAUTOpositionANDUtilityvoltageisnotwithin acceptable range of under voltage relay OR,MicroTurbine(s)areinStandAloneLoadstate. INALLCASES,12V/24VpowerMUSTbeavailablefromtheMicroTurbine(s) to trip isolation switch S1. 513000-001 (Oct 2001) Page 26 of 32 DMC Application Guide. Rev. A Capstone Turbine Corporation reserves the right to change or modify without notice the design, the equipment specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. WARNING Some load types are sensitive to phase sequence and may operate incorrectly or unsafely when connected to a source of incorrect phase sequence. Before operating the Protected Loads, verify that the utility supply and the MicroTurbine(s) are connected to the DMC in a consistent L1, L2, L3 phase sequence, and that the Protected Loads are compatible with an L1, L2, L3 phase sequence.PDF Image | Dual Mode Controller Application Guide
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