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Capstone Turbine Corporation 21211 Nordhoff Street Chatsworth CA 91311 USA Technical Reference: Capstone MicroTurbine Electrical Installation Single Unit or MultiPac Connections Must be continuous with the utility ground Isolation Transformer Dual Mode System Controller Wye Utility Service or Local Transformer L3 L2 L1 N G Refer to Figures 10 & 11 for isolation transformer connection details Figure 19. Dual Mode Connections: Using an Isolation Transformer 7. C65 Hybrid UPS The C65 Hybrid UPS microturbine comes with two AC power connections, the GLCM and LLCM. The GLCM connection should connect to the utility grid source, and the LLCM output should connect to the critical load bus. Due to the unique design of the C65 Hybrid UPS microturbine compared to other Capstone products, external isolation transformers are required on both connections to avoid momentary short circuit through the internal power electronics. The required LLCM and GLCM AC power connections must be three-phase, four wire un- grounded wye. . CAUTION: The maximum length for the conductor between each microturbine AC connection and the isolation transformer is 10 meters. All conductor should be run using grounded conduit. Exceeding this length could result in excessive EMF generation, which could interfere with operation of sensitive electrical equipment. Contact Capstone Applications Engineering with any questions. The DC external battery should be connected with proper polarity of positive and negative verified. There should be no power grounding on the external battery string, since this is provided internally to the Hybrid UPS Microturbine. For the DC battery connection, a DC circuit 410009 Rev F (October 2013) Page 25 of 31 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. Protected Loads PE/G WARNING: The neutral wire should NOT be grounded at the microturbine connection bay or at either isolation transformer. The only ground connection should be the chassis ground connection at each C65 Hybrid UPS microturbine. This is due to the fact that the positive DC bus is grounded internally. The chassis grounding is required per normal installation guidelines listed in Section 3.2.PDF Image | Technical Reference Capstone MicroTurbine Electrical Installation
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