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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Protective Relay Functions for Capstone MicroTurbines Table 3. Over/Under Frequency Protective Function Parameters Display Mode Grid Connect Menu Under Frequency RS-232 Command Parameter Description Parameter Value Default If the grid frequency falls below this value for greater than Under Frequency Time, the system will shut down. 45 Hz to Over Frequency in 0.1 Hz increments For VDE compliance this setting must be 47.5 Hz 59.3 UNDFRQ Under Frequency Time Establishes the time period allowed for the Frequency to fall below the Under Frequency limit. C30: 0.06 to 10 sec C65/C200: 0.01 to 300 sec Adjustable in 0.01 second increments C30: 0.09 C65/C200: 0.10 UFRQTM Over Frequency If the grid frequency rises above this value for greater than Over Frequency Time, the system will shut down. Under Frequency to 65Hzin0.1Hz increments For VDE compliance this setting must be 51.5 Hz. 60.5 OVRFRQ Over Frequency Time Establishes the time period allowed for the Frequency to rise above the Over Frequency limit. C30: 0.06 to 10 sec C65/C200: 0.01 to 300 sec Adjustable in 0.01 second increments C30: 0.09 C65/C200: 0.10 OFRQTM Fast Under Frequency (C65/C200 only) If grid frequency drops below this value for greater than the fast under frequency time, the system will shut down. 0 to Under Frequency in 0.1 Hz increments 57.0 N/A Fast Under Frequency Time (C65/C200 only) Establishes the time period allowed for the frequency to drop below the Fast Under Frequency limit. 0.01 to 300 sec in 0.01 second increments 0.10 N/A 410033 Rev H (December 2013) Page 12 of 17 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 Protective Relay Functions for Capstone Microturbines
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