GE T60 Instruction Manual page 374

5.6 GROUPED ELEMENTS
c) PHASE TIME OVERCURRENT (ANSI 51P, IEC PTOC)

PATH: SETTINGS GROUPED ELEMENTS
 PHASE TOC1

5
The phase time overcurrent element can provide a desired time-delay operating characteristic versus the applied current or
be used as a simple definite time element. The phase current input quantities may be programmed as fundamental phasor
magnitude or total waveform RMS magnitude as required by the application.
Two methods of resetting operation are available: "Timed" and "Instantaneous" (see the Inverse TOC Curve Characteristics
section earlier for details on curve setup, trip times, and reset operation). When the element is blocked, the time accumula-
tor will reset according to the reset characteristic. For example, if the element reset characteristic is set to "Instantaneous"
and the element is blocked, the time accumulator will be cleared immediately.
The
PHASE TOC1 PICKUP
plished via the multipliers (Mvr) corresponding to the phase-phase voltages of the voltage restraint characteristic curve (see
the figure below); the pickup level is calculated as 'Mvr' times the
is disabled, the pickup level always remains at the setting value.
5-228

SETTING GROUP 1(6)
PHASE TOC1
FUNCTION: Disabled
PHASE TOC1 SIGNAL
MESSAGE
SOURCE: SRC 1
PHASE TOC1
MESSAGE
INPUT: Phasor
PHASE TOC1
MESSAGE
PICKUP:
PHASE TOC1
MESSAGE
CURVE: IEEE Mod Inv
PHASE TOC1
MESSAGE
TD MULTIPLIER:
PHASE TOC1
MESSAGE
RESET: Instantaneous
PHASE TOC1 VOLTAGE
MESSAGE
RESTRAINT: Disabled
PHASE TOC1 BLOCK A:
MESSAGE
Off
PHASE TOC1 BLOCK B:
MESSAGE
Off
PHASE TOC1 BLOCK C:
MESSAGE
Off
PHASE TOC1
MESSAGE
TARGET: Self-reset
PHASE TOC1
MESSAGE
EVENTS: Disabled
setting can be dynamically reduced by a voltage restraint feature (when enabled). This is accom-
T60 Transformer Protection System

PHASE CURRENT
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: Phasor, RMS
Range: 0.000 to 30.000 pu in steps of 0.001
1.000 pu
Range: See Overcurrent Curve Types table
Range: 0.00 to 600.00 in steps of 0.01
1.00
Range: Instantaneous, Timed
Range: Disabled, Enabled
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
PHASE TOC1 PICKUP
5 SETTINGS

PHASE TOC1(6)
setting. If the voltage restraint feature
GE Multilin