CHAPTER 5: SETTINGS GROUPED ELEMENTSC70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL 5-2395Use the negative-sequence overvoltage element to detect loss of one or two phases of the source, a reversed phasesequence of voltage, or a non-symmetrical system voltage condition.Figure 5-126: Negative-sequence overvoltage logic5.7.8.6 Auxiliary overvoltage (ANSI 59X, IEC PTOV)SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS AUXILIARY OV1(3)The C70 contains one auxiliary overvoltage element for each VT bank. This element is intended for monitoring overvoltageconditions of the auxiliary voltage. The nominal secondary voltage of the auxiliary voltage channel entered under SYSTEMSETUP AC INPUTS VOLTAGE BANK X5 AUXILIARY VT X5 SECONDARY is the per-unit (pu) base used when setting thepickup level. AUXILIARY OV1 AUX OV1FUNCTION: DisabledRange: Disabled, Enabled AUX OV1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6 AUX OV1 PICKUP:0.300 puRange: 0.004 to 3.000 pu in steps of 0.001 AUX OV1 PICKUPDELAY: 1.00 sRange: 0.00 to 600.00 s in steps of 0.01 AUX OV1 RESETDELAY: 1.00 sRange: 0.00 to 600.00 s in steps of 0.01 AUX OV1 BLOCK:OffRange: FlexLogic operand AUX OV1 TARGET:Self-resetRange: Self-reset, Latched, Disabled AUX OV1 EVENTS:DisabledRange: Disabled, Enabled
