Capstone Turbine Corporation • 16640 Stagg Street • Van Nuys • CA 91406 • USA
Installation Guide: Capstone C1000S/C800S/C600S with C1000 Series Controller
480064 Rev C (December 2018) Page 86 of 122
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.
Figure 37. Delta Service with Grounding Transformer and 3-Pole Breaker
3-wire delta utility service connections require a grounding (zig zag) transformer,
as phase-to-ground voltages float and, over time, become unbalanced with
respect to ground which causes microturbine nuisance trips. In addition, the
phase-to-ground voltages reach levels that can break the insulation in the
IGBTs-to-ground and cause equipment failure. Capstone Applications approval
is required for grounding transformer applications.
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