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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Protective Relay Functions for Capstone MicroTurbines Table 1. Under Voltage Protective Function Parameters Display Mode Grid Connect Menu Parameter Description Parameter Value Default RS-232 Command Under Voltage If the voltage on any phase falls below this setting for greater than Under Voltage Time, the system will shut down. 360 to Over Voltage (L-L) 428 UNDVLT Under Voltage Time Establishes the time period allowed for any phase voltage to fall below the Under Voltage limit. 0.3 to 10 seconds 1.90 UVLTTM Fast Under Voltage The system will cease to export power to the grid within 1 msec if any phase voltage drops below this voltage for greater than Fast Under Voltage Time. 0 to Under Voltage (L-L) 264 FSTUVL Fast Under Voltage Time Establishes the time period allowed for any phase voltage to fall below the Fast Under Voltage limit. 0.03 to 1.000 seconds 0.095 UVFSTM Power Export Suspended for Swells in this Region Continous Operations Area Grid Fault Shutdown Initiated 600 524 429 264 Grid Fault Shutdown Initiated 600 400 200 0 Note: Trip voltages and durations shown in Figure 3 are those entered into the Power Controller prior to shipment. The Primary and Fast Over/Under Voltage trip levels and durations may be adjusted at installation as indicated in Tables 1 and 2. Figure 3. Grid Fault Shut down Trip Limits for Over/Under Voltage Events 410033 Rev. D (February 2006) Page 5 of 10 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the equipment specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Power Export Suspended for Sags in this Region 0.01 0.1 1 5 0.015 0.095 1.9 DURATION OF VOLTAGE SAG/SWELL (SECONDS) GRID VOLTAGE AT THE MICROTURBINE (LINE-TO-LINE PMS VOLTS)PDF Image | Technical Reference Protective Relay Functions for Capstone MicroTurbines
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