CHAPTER 5: SETTINGS GROUPED ELEMENTSL90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-2615GROUND TOC1 TD MULTIPLIER — This setting specifies a multiple of the base curve shape specified by the CURVE setting.Programming this value to zero results in an instantaneous response to all current levels above pickup.GROUND TOC1 RESET — The “Instantaneous” reset method is intended for applications with other relays, such as most staticrelays, which set the energy capacity directly to zero when the current falls below the reset threshold. The “Timed” resetmethod can be used where the relay must coordinate with electromechanical relays.GROUND TOC1 BLOCK — Assertion of the operand assigned to this setting blocks operation of the ground time overcurrentelement.GROUND TOC1 EVENTS — This setting enables and disables the logging of ground time overcurrent events in the sequenceof events recorder.Figure 5-140: Ground TOC1 logic5.7.11.3 Ground instantaneous overcurrent (ANSI 50G, IEC PIOC)SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) GROUND CURRENT GROUND IOC1(8)The ground instantaneous overcurrent element can be used as an instantaneous element with no intentional delay or as adefinite time element. The ground current input is the quantity measured by the ground input CT and is the fundamentalphasor magnitude.These elements measure the current that is connected to the ground channel of a CT/VT module. The conversionrange of a standard channel is from 0.02 to 46 times the CT rating. GROUND IOC1 GROUND IOC1FUNCTION: DisabledRange: Disabled, Enabled GROUND IOC1 SIGNALSOURCE: SRC 1Range: SRC 1, SRC 2, SRC 3, SRC 4 GROUND IOC1PICKUP: 1.000 puRange: 0.020 to 30.000 pu in steps of 0.001 GROUND IOC1 PICKUPDELAY: 0.00 sRange: 0.00 to 600.00 s in steps of 0.01 GROUND IOC1 RESETDELAY: 0.00 sRange: 0.00 to 600.00 s in steps of 0.01 GROUND IOC1 BLOCK:OffRange: FlexLogic operand GROUND IOC1TARGET: Self-resetRange: Self-reset, Latched, Disabled GROUND IOC1EVENTS: DisabledRange: Disabled, Enabled
