GE Multilin D60 Line Distance Relay 5-1435 SETTINGS 5.5 GROUPED ELEMENTS5d) NEUTRAL OVERVOLTAGE (ANSI 59N)PATH: SETTINGS !" GROUPED ELEMENTS ! SETTING GROUP 1(6) !" VOLTAGE ELEMENTS !" NEUTRAL OV1The Neutral Overvoltage element can be used to detect asymmetrical system voltage condition due to a ground fault or tothe loss of one or two phases of the source. The element responds to the system neutral voltage (3V_0), calculated fromthe phase voltages. The nominal secondary voltage of the phase voltage channels entered under SETTINGS !" SYSTEMSETUP ! AC INPUTS !" VOLTAGE BANK ! PHASE VT SECONDARY is the p.u. base used when setting the pickup level.VT errors and normal voltage unbalance must be considered when setting this element. This function requires the VTs tobe Wye connected.Figure 5ñ89: NEUTRAL OVERVOLTAGE1 SCHEME LOGIC# NEUTRAL OV1#NEUTRAL OV1FUNCTION: DisabledRange: Disabled, EnabledMESSAGE NEUTRAL OV1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2, SRC 3, SRC 4MESSAGE NEUTRAL OV1 PICKUP:0.300 puRange: 0.000 to 1.250 pu in steps of 0.001MESSAGE NEUTRAL OV1 PICKUP:DELAY: 1.00 sRange: 0.00 to 600.00 s in steps of 0.01MESSAGE NEUTRAL OV1 RESET:DELAY: 1.00 sRange: 0.00 to 600.00 s in steps of 0.01MESSAGE NEUTRAL OV1 BLOCK:OffRange: FlexLogicô operandMESSAGE NEUTRAL OV1 TARGET:Self-resetRange: Self-reset, Latched, DisabledMESSAGE NEUTRAL OV1 EVENTS:DisabledRange: Disabled, Enabled827848A1.CDRFLEXLOGIC OPERANDSNEUTRAL OV1FUNCTION:NEUTRAL OV1 BLOCK:NEUTRAL OV1 SIGNALSOURCE:NEUTRAL OV1 PICKUP:NEUTRAL OV1 DPONEUTRAL OV1 OPNEUTRAL OV1 PKPRUNANDSETTINGSETTINGNEUTRAL OV1 RESETDELAY :NEUTRAL OV1 PICKUPDELAY :SETTINGEnabled=1Disabled=0tPKPt RSTSETTINGSETTINGOff=0ZERO SEQ VOLT (V_0)3V_0 Pickup <
