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Capstone Turbine Corporation 21211 Nordhoff Street Chatsworth CA 91311 USA Technical Reference: Dual Mode System Controller (DMSC) Adjustable Settings Settings that are adjustable by the user are described in Table 1. Table 1. Undervoltage Relay Adjustable Settings Parameter Settings UVR Dial Undervoltage 80 to 95% of nominal voltage (Suggested setting = 85%) The UVR trips when the average of all three lines is less than the adjusted setpoint for a period longer than the adjustable time delay. UNDERVOLTAGE Nominal Voltage 208, 220, 230, 240, 400, 440, 460, 480 V This must be set to the actual three-phase voltage before line voltage is applied to the DMSC. DO NOT adjust this setting with line voltage applied. NOMINAL VOLTAGE Phase Unbalance 2 to 10%, DISABLE (Suggested setting = 10%) The UVR trips when any one of the three phases deviates from the average of all three phases by more than the adjusted setpoint. The Disable setting turns off phase unbalance protection for installations where voltage fluctuations cause nuisance tripping. UNBALANCE Undervoltage Time Delay Setting 0.1 to 20 seconds (Suggested setting = 3 sec) The UVR trips if an undervoltage condition lasts longer than the time period of this setting. TIME DELAY UNDER- VOLTAGE Time Delay Restart 1 to 300 seconds (Suggested setting = 30 sec) This setting should be the required time period for the relay to wait before energizing after a fault has been cleared. TIME DELAY RESTART 410071 Rev. B (January 2009) Page 21 of 71 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 | TECH REF DMSC RB
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