GE L90 Instruction Manual page 429

CHAPTER 5: SETTINGS
— Specifies a multiple of the base curve shape specified by the
TD MULTIPLIER
zero results in an instantaneous response to all current levels above pickup.
— The "Instantaneous" reset method is intended for applications with other relays, such as most static relays, which
RESET
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.
— Enables and disables the phase time overcurrent voltage restraint feature.
VOLTAGE RESTRAINT
— Assertion of the operand assigned to this setting blocks phase A of the phase time overcurrent element.
BLOCK A
— Enables and disables the logging of phase time overcurrent events in the sequence of events recorder.
EVENTS
5.7.8.4 Phase instantaneous overcurrent (ANSI 50P, IEC PIOC)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT  PHASE IOC 1(8)
 PHASE IOC 1

L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
Figure 5-130: Phase time overcurrent 1 logic
PHASE IOC1

FUNCTION: Disabled
PHASE IOC1 SIGNAL

SOURCE: SRC 1
PHASE IOC1

PICKUP: 1.000 pu
PHASE IOC1 PICKUP

DELAY: 0.00 s
PHASE IOC1 RESET

DELAY: 0.00 s
GROUPED ELEMENTS
setting. Programming this value to
CURVE
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
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
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