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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Capstone MicroTurbine Electrical Installation Grounding The Capstone MicroTurbine during Grid Connect operation is designed for ground- referenced, balanced voltage operation. The recommended connection for Grid Connect operation is to a 4-wire Wye system, where the neutral is solidly grounded. The neutral-to-ground connection should be at the utility service panel of the facility. A SOLID EARTH GROUND of the MicroTurbine is MANDATORY for successful operation. The MicroTurbine uses digital electronics to sense line voltages and currents that require a solid ground connection to perform accurately. Refer to the following electrical diagrams for proper grounding location. Neglecting to properly ground the MicroTurbine system (that is, no neutral-to-ground connection, or more than one neutral-to-ground connection) can cause damage to the MicroTurbine system. In all cases, the neutral-to-ground post (if equipped) MUST be removed from the high voltage bay of the MicroTurbine User Connection Bay. Grid Connect operation with the neutral-to- ground post installed may create multiple neutral-to-ground connections. This condition can lead to circulating currents, resulting in nuisance faults with the MicroTurbine or which may cause safety hazards within the facility. Refer to Figures 2 and 3 for neutral-to-ground post details within the User Connection Bay. Notice that all electrical wiring, including protection and grounding, must conform to all local and national electrical codes and regulations. Figure 2. Model C30 Terminal Block (Located in Power Bay at Rear of Enclosure) 410009-001 Rev C (September 2003) Page 6 of 24 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product 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. The neutral-to- ground post (and screw) if installed. The actual post is located behind the bus bar as shown.PDF Image | Technical Reference Capstone MicroTurbine Electrical Installation Introduction
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