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CHAPTER 4 Capstone OPERATING MODES needs to be taken to avoid conflicting commands that could damage equipment. Capstone offers a Dual Mode System Controller accessory which provides the necessary wiring and logic to sense utility grid problems and automatically switch between these two operating modes. Fast Transfer The C200 is able to transition from Grid Connect to Stand Alone mode in less than 10 seconds. The microturbine is not able to reconnect to a utility grid without first sensing voltage stability for at least 5 minutes (refer to Grid Connect above). However, protected loads can be quickly transitioned back to a utility source by first stopping microturbine power output in Stand Alone mode, and then reconnecting the protected loads back to the utility. The microturbine can then continue to operate in a Hot Standby mode (producing no load power but recharging its batteries) until it senses the utility is stable and then reconnecting automatically in Grid Connect mode. The Dual Mode System Controller Technical Reference (410071) provides details about the transitions and timing for fast transfer. MultiPac This section provides technical information for operating the Capstone Model C200 microturbine in a collective arrangement known as a MultiPac. In a MultiPac, microturbines can be installed in groups of up to 20 units (more with the optional Capstone Advanced Power Server) to operate as a single power generation source. Refer to the Capstone Advanced Power Server Technical Reference (480023) for details utilizing an Advanced Power Server in MultiPac installations. MultiPac operation features synchronous voltage and frequency for all microturbines in the group. Individual microturbines share power and load on both a dynamic and steady state basis. A single physical and logical control point, designated as the “Master”, directs signal and command information to all other turbines. Any individual turbine in the group or the Advanced Power Server may be designated as the Master. MultiPac can be operated in either of the operating modes described above: Stand Alone or Grid Connect. In each mode, individual microturbines share power, current and load on both a dynamic and steady state basis, and generate current to meet the required load demand. Dual Mode operation requires purchase of a Capstone Dual Mode System Controller. An illustrative interconnection diagram is presented in Figure 4-1. 410066 Rev C (June 2009) 4-7 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. CAUTION The microturbine can only provide power in L1, L2, L3 counter clockwise phase rotation in Stand Alone mode. Therefore, proper phase wiring must be respected relative to the utility grid voltage. Connections L2 and L3 to the microturbine may need to be swapped to achieve a consistent phase rotation when switching between utility voltage in Grid Connect mode and microturbine voltage in Stand Alone mode to avoid damage to loads that are sensitive to phase rotation.PDF Image | CAPSTONE C200 MICROTURBINE TECHNICAL REFERENCE
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