GE C70 Instruction Manual page 350

GROUPED ELEMENTS
NEUTRAL TOC1 FUNCTION
NEUTRAL TOC1 SIGNAL SOURCE
NEUTRAL TOC1 INPUT
selected as fundamental phasor magnitudes or total waveform RMS magnitudes as required by the application.
NEUTRAL TOC1 PICKUP
NEUTRAL TOC1 CURVE
NEUTRAL TOC1 TD MULTIPLIER
Programming this value to zero results in an instantaneous response to all current levels above pickup.
NEUTRAL TOC1 RESET
relays, which set the energy capacity directly to zero when the current falls below the reset threshold. The "Timed" reset
method can be used where the relay must coordinate with electromechanical relays.
NEUTRAL TOC1 BLOCK
element.
NEUTRAL TOC1 EVENTS
of events recorder.
5
5.7.4.3 Neutral instantaneous overcurrent (ANSI 50N, IEC PIOC)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  NEUTRAL CURRENT  NEUTRAL IOC1(6)
 NEUTRAL IOC1

5-184
— This setting enables and disables the neutral time overcurrent protection element.
— This setting selects the signal source for the neutral time overcurrent protection element.
— This setting selects how neutral current input quantities are interpreted by the C70. Inputs can be
— This setting specifies the neutral time overcurrent pickup level in per-unit values.
— This setting selects the inverse time overcurrent curve style.
— This setting specifies a multiple of the base curve shape specified by the
— The "Instantaneous" reset method is intended for applications with other relays, such as most static
— Assertion of the operand assigned to this setting blocks operation of the neutral time overcurrent
— This setting enables and disables the logging of neutral time overcurrent events in the sequence
Figure 5-92: Neutral time overcurrent 1 logic
NEUTRAL IOC1

FUNCTION: Disabled
NEUTRAL IOC1 SIGNAL

SOURCE: SRC 1
NEUTRAL IOC1

PICKUP: 1.000 pu
NEUTRAL IOC1 PICKUP

DELAY: 0.00 s
NEUTRAL IOC1 RESET

DELAY: 0.00 s
NEUTRAL IOC1 BLOCK:

Off
NEUTRAL IOC1

TARGET: Self-reset
NEUTRAL IOC1

EVENTS: Disabled
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.020 to 30.000 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
setting.
CURVE