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Capstone Turbine Corporation UPS Controller User’s Manual Emergency Stop All Capstone microturbines have an emergency stop function called “E-Stop”, which will immediately disconnect power from the load as well as the incoming utility, shut off fuel input, and force the turbines into a hot shutdown. In a hot shutdown, the turbines do not receive power from the utility or the external energy storage system, and therefore cannot be motored to a controlled stop. Instead, the turbines coast to a stop and excess thermal energy stored in the engine’s recuperator section is released through a compressor bypass valve. This uncontrolled stop puts abnormal mechanical and thermal stresses on the engines, and can reduce the turbine generator life. Therefore, E-Stop should only be used as a worst case emergency means to shut the system off. The E-Stop function is controlled using a discrete input to the UPS Controller, and can be wired to a building management system for automatic operating in case of emergency, or can be wired to a manual “Emergency Stop” button. Refer to specific instructions provided by the building management system integrator or system installer for the location of any Emergency Stop button and instructions how to activate this function from the building management system. WARNING Activation of the Emergency Stop function represents an extremely abnormal event which could be due to building, equipment, or personnel safety concerns. Thoroughly investigate the reason for issuing an Emergency Stop command and make sure the cause has been remedied before attempting to return the system to normal operation. CAUTION Repeated use of the optional Emergency Stop function will result in damage to the microturbine. Use only in emergency situations. After an emergency stop, the power to the microturbine must be turned off for 30 seconds before a restart can be attempted. Emergency stops should NEVER be used for routine shutdowns. Also, after an E-Stop, you may want to manually close the external fuel isolation valves to shut off potential fuel flow into the microturbine in case there is a fuel leak. The external fuel isolation valve must be returned to the open position before a restart of the microturbine is attempted. An E-Stop operation should be viewed as an extremely abnormal event, and a thorough investigation as to why the E-Stop command was given should be conducted before returning the system to normal operation. 400028 Rev B (January 2014) Page 31 of 35 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 | Hybrid UPS Controller User's Manual
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