GE C70

5-206 C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS CHAPTER 5: SETTINGS
5
NEUTRAL TOC1 FUNCTION — This setting enables and disables the neutral time overcurrent protection element.
NEUTRAL TOC1 SIGNAL SOURCE — This setting selects the signal source for the neutral time overcurrent protection element.
NEUTRAL TOC1 INPUT — This setting selects how neutral current input quantities are interpreted by the C70. Inputs can be
selected as fundamental phasor magnitudes or total waveform RMS magnitudes as required by the application.
NEUTRAL TOC1 PICKUP — This setting specifies the neutral time overcurrent pickup level in per-unit values.
NEUTRAL TOC1 CURVE — This setting selects the inverse time overcurrent curve style.
NEUTRAL 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.
NEUTRAL TOC1 RESET — The “Instantaneous” reset method is intended for applications with other relays, such as most static
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 — Assertion of the operand assigned to this setting blocks operation of the neutral time overcurrent
element.
NEUTRAL TOC1 EVENTS — This setting enables and disables the logging of neutral time overcurrent events in the sequence
of events recorder.
Figure 5-104: Neutral time overcurrent 1 logic
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


NEUTRAL IOC1
FUNCTION: Disabled
Range: Disabled, Enabled

NEUTRAL IOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6

NEUTRAL IOC1
PICKUP: 1.000 pu
Range: 0.020 to 30.000 pu in steps of 0.001

NEUTRAL IOC1 PICKUP
DELAY: 0.00 s
Range: 0.00 to 600.00 s in steps of 0.01

NEUTRAL IOC1 RESET
DELAY: 0.00 s
Range: 0.00 to 600.00 s in steps of 0.01

NEUTRAL IOC1 BLOCK:
Off
Range: FlexLogic operand

NEUTRAL IOC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled

NEUTRAL IOC1
EVENTS: Disabled
Range: Disabled, Enabled