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Capstone Turbine Corporation 21211 Nordhoff Street Chatsworth CA 91311 USA Technical Reference: Capstone MicroTurbine Electrical Installation breaker disconnect must be included between the batteries and the unit. See the C65 Hybrid UPS Application Guide (Refer to Table 1) for more details on battery system specification. Three- or four-wire connections are allowable, as shown in Figure 20 and Figure 21. For four- wire connections, the critical loads need not be balanced as long as the current limits per phase are not exceeded. 7.1. Surge Protection Device Due to the unique internal architecture of the C65 Hybrid UPS system, a surge protection device must be installed on the grid-side connection of the isolation transformer for each unit. Capstone will provide the device required for UL installations as well as any other 4-wire 480Y/277V installations. All other wiring configurations will require an alternative surge protection device, which must be specified with the assistance of Capstone Applications Engineering. The spec sheet and installation documents from the manufacturer are listed in Appendix of the C65 Hybrid UPS Application Guide (480049). The required connections for the surge protection device are described in detail in Figure 20 through Figure 22 below. The device should be mounted with leads as short as possible, recommended not to exceed 1m in length. WARNING: Three-wire critical load connections are allowable as long as the neutral on the critical load side of the isolation transformer is grounded AND the critical loads are BALANCED. No unbalanced critical loads are allowed for 3-wire critical load connections. 7.2. Allowable Connections Table 6. HUPS Allowable Connections 16 X X Yes Wye/Wye Supplied by Capstone Figure No. Grid Connection Wiring Critical Load Connection UL2200/1741 Compliance Isolation Transformer Windings Surge Protection Device 4-wire 3- wire 4-wire 3-wire 17 X X Yes Wye/Wye Contact Applications Engineering 18 X X No Wye/Delta Contact Applications Engineering 410009 Rev F (October 2013) Page 26 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.PDF Image | Technical Reference Capstone MicroTurbine Electrical Installation
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