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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Dual Mode System Controller (DMSC) Product Description Microturbines operate in Grid Connect mode when the utility grid is performing normally. However, during a utility power outage, many applications require generators to support Stand Alone operation to provide power for protected loads. The DMSC enables the microturbine to automatically transition from Grid Connect operation to Stand Alone when a utility power outage occurs. Logic in the DMSC activates a motor-operated disconnect device that isolates the microturbine and protected loads from the grid during Stand Alone operation. When utility power is restored, the DMSC automatically reconnects the protected loads to the utility grid. The DMSC also allows the microturbine to be automatically operated as a standby generator for protected loads. An overall DMSC block diagram is provided in Figure 2. An optional protective relay, when connected to the DMSC, can be used as an external trip device. An optional Capstone Advanced Power Server (APS) can be used to interface with the DMSC. In this configuration, the DMSC allows the APS to control and enable the Capstone microturbine(s) to operate in Grid Connect mode and transition its output power to protected loads during an electric utility outage. Advanced Power Server (Optional)* <= 500ft <= 100ft (Path without APS) <= 100ft <= 500ft <= 500ft <= 500ft Disconnect Device * If the Advanced Power Server (APS) is used, the APS will be Master and all connected MTs will be Subordinates. Figure 2. DMSC Block Diagram DMSC Protective Relay (Optional) DMC Annunciator Panel (Optional) MT1 (Master) MT2 (Sub) MT3 (Sub) Protected Load MT4 (Sub) 410071 Rev D (January 2010) GRID Power Wire Control Cable Page 12 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. Capstone Multipac CablesPDF Image | Dual Mode System Controller DMSC
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