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CHAPTER 9 Capstone PROTECTIVE RELAY FUNCTIONS Fast Over Voltage Trip The Fast Over Voltage is adjustable from the Over Voltage up to 634 V. (Initial factory setting = 576V). The time period is adjustable from 0.03 to 1.00 second in 0.01 second increments. (Initial factory setting = 0.16 seconds). The UL1741 requirement for this function is: The device should cease to energize the output within 0.16 seconds when any of the phase voltages is higher than 333 VL-N while the other phase voltages remain at 277 VL-N As shipped, each microturbine is tested to verify that it meets the UL1741 requirement to cease power export to the grid within 160 ms if any phase voltage swells to 333 VL-N. The Fast Over Voltage Trip level may be adjusted downwards as indicated in Table 9-2 and still comply with UL1741. The duration to Fast Over Voltage Trip may also be adjusted downwards as indicated in Table 9-2 and still comply with UL1741. These Over Voltage protective functions are illustrated in Figure 9-2. The over voltage trips are programmed into the Power Controller as phase-to-phase voltages. Voltages indicated in Figure 9-2 are phase-to-phase voltages. However, the actual trip functions are based on phase-to-neutral voltages with equivalent trip levels. Table 9-2. Over Voltage Protective Function Parameters Display Mode Parameter Description Parameter Value Initial Factory Settings RS-232 Command to read the settings Grid Connect Menu Over Voltage If the voltage on any phase rises above this setting for greater than Over Voltage Time, the system will shut down. Under Voltage to 528 V (L-L) 528 OVRVLT Establishes the time period Over Voltage Time allowed for any phase voltage to rise above the Over Voltage limit. 0.01 to 10.00 seconds 1.00 OVLTTM Fast Over Voltage The system will cease to export power to the grid within 1 msec if any phase voltage rises above this voltage for greater than Fast Over Voltage Time. Over Voltage to 634 V (L-L) 576 FSTOVL Fast Over Voltage Time Establishes the time period allowed for any phase voltage to rise above the Fast Over Voltage limit. 0.03 to 1.00 seconds 0.16 OVFSTM 410066 Rev C (June 2009) 9-5 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 | CAPSTONE C200 MICROTURBINE TECHNICAL REFERENCE
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