GE Multilin C70 Capacitor Bank Protection and Control System 5-2255 SETTINGS 5.7 CONTROL ELEMENTS5• AVR 1 VOLT LEVEL TO OPEN: In the voltage mode, this setting specifies the voltage level at or above which to issuethe open command. The following figure illustrates voltage control level settings.Figure 5–101: CLOSE AND OPEN LEVELS WHEN CONTROLLING VOLTAGE OR VARS• AVR 1 VOLT DROP COMPENS Z: In the voltage mode, this setting allows compensating for voltage drop on the linewhen the relay measuring point is located upstream of the load. Positive-sequence line impedance is entered in sec-ondary ohms. Compensation cannot exceed 20% of the nominal phase voltage.• AVR 1 VOLT DROP COMPENS RCA: In the voltage mode, this setting specifies the angle of the line impedance forvoltage drop calculations.• AVR 1 VAR LEVEL TO CLOSE: In the “VAR” mode, this setting specifies level for the three-phase reactive power levelat or above which to issue the close command. The 1 pu value is the product of the nominal primary phase-to-phasevoltage, the CT primary, and . When the source current is an internal summation of two or more CT bank currents,the largest CT primary is used to define the 1 pu value for this setting.• AVR 1 VAR LEVEL TO OPEN: In the “VAR” mode, this setting specifies level for the three-phase reactive power levelat or below which to issue the OPEN command. The 1 pu value is defined as for the VAR LEVEL TO CLOSE setting.• AVR 1 POWER FACTOR LIMIT: In the “VAR” mode, this setting specifies the power factor below which close com-mands are allowed. Also affects open commands as shown in the above figure. If set to “1.00”, the power factor has noeffect.• AVR 1 VAR OPEN MODE: Selects the close command characteristic, either “Minimize No. of Ops.” (minimize numberof operations) or “Minimize Uptime”, as described earlier in the Automatic voltage regulator pickup characteristics in“VAR” mode diagram.• AVR 1 DELAY BEFORE CLOSE: This setting specifies delay before issuing the close command, and is used to coor-dinate with other regulators, or to ride through abnormal system conditions such as faults or re-close sequences.• AVR 1 DELAY BEFORE OPEN: This setting specifies delay before issuing the open command, and is used to coordi-nate with other regulators, or to ride through abnormal system conditions such as faults or re-close sequences.• AVR 1 BLOCK: This setting specifies a dynamic blocking condition. When blocked the element resets its output flagsand internal timers. VT fuse fail is a typical application.834733A1.CDRVOLTAGEOPENCLOSEVOLT LEVELTO CLOSEVOLT LEVELTO OPEN VARsOPENCLOSEVAR LEVELTO OPENVAR LEVELTO CLOSE3
