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Capstone Turbine Corporation 21211 Nordhoff Street Chatsworth CA 91311 USA Technical Reference: Capstone C65 Electrical For some applications, the current draw required on the external equipment may exceed the rated current on the UCB relays. In these cases, an interposing relay must be installed. Electromechanical interposing relays are highly recommended over solid-state relays for electrical isolation. The digital outputs (output relays) are simple contact closures intended for dry contact circuits. Wetting voltage must be provided by external power source. The following functions (set in CRMS) are available for Digital Outputs: Control State Functions - digital outputs can be selected to switch at any control state as defined in Table 16. Active (Open / Close) o Active Open – If a control state is TRUE the digital output will change from a closed to open position. o Active Close – If a control state is TRUE the digital output will change from an open to closed position. NOTE: When the microturbine is powered off the digital outputs revert back to their de- energized state of normally open. Table 16 lists the control state functions that can be used with the output relays described in Table 15. Refer to the CRMS Technical Reference Maintenance Edition (410014) for details. CAUTION: Digital outputs must be configured BEFORE making any electrical connections. Failure to do this may cause damage to the microturbine and void the warranty. CAUTION: The coil rating of the interposing relay must not exceed the rated current and voltage on the UCB relays. Otherwise permanent damage to the UCB board may occur. Function Control State (Function is True) Standby Run Contactor Closed Fault Stand Alone Stand Alone Load Disable Fuel On Fuel Purge Load State Table 16. Control State Functions System is in the Standby state. Engine is running or power electronics are enabled. Output Contactor is closed. Fault occurs that is severity level 3 or greater System is in the Stand Alone mode System is in the Stand Alone mode and in the Load State. System is in the Disable state. Electrical fuel shut-off is enabled. 10 seconds after the electrical fuel shutoff is closed (for units equipped for liquid fuel only). System is in the Load State (GC or SA). 410001 Rev N (August 2013) Page 40 of 43 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 Model C65 Electrical
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