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T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS
CHAPTER 5: SETTINGS
5
The phase time overcurrent element can provide a specified time-delay operating characteristic versus the applied current
or be used as a simple definite time element. The phase current input quantities can 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
accumulator resets according to the reset characteristic. For example, if the element reset characteristic is set to
“Instantaneous” and the element is blocked, the time accumulator clears immediately.
The
PHASE TOC1 PICKUP
setting can be reduced dynamically by a voltage restraint feature (when enabled). This is
accomplished via the multipliers (Mvr) corresponding to the phase-phase voltages of the voltage restraint characteristic
curve (see the figure); the pickup level is calculated as Mvr times the
PHASE TOC1 PICKUP
setting. If the voltage restraint
feature is disabled, the pickup level always remains at the setting value.
Figure 5-108: Phase time overcurrent voltage restraint characteristic
FUNCTION
— This setting enables and disables the phase time overcurrent protection element.
SIGNAL SOURCE
— Selects the signal source for the phase time overcurrent protection element.
INPUT
— Selects how phase current input quantities are interpreted by the T35. Inputs can be selected as fundamental
phasor magnitudes or total waveform RMS magnitudes as required by the application.
PICKUP
— Specifies the phase time overcurrent pickup level in per-unit values.
CURVE
— Selects the time inverse overcurrent curve style.
PHASE TOC1
TD MULTIPLIER: 1.00
Range: 0.00 to 600.00 in steps of 0.01
PHASE TOC1
RESET: Instantaneous
Range: Instantaneous, Timed
PHASE TOC1 VOLTAGE
RESTRAINT: Disabled
Range: Disabled, Enabled
PHASE TOC1 BLOCK A:
Off
Range: FlexLogic operand
PHASE TOC1 BLOCK B:
Off
Range: FlexLogic operand
PHASE TOC1 BLOCK C:
Off
Range: FlexLogic operand
PHASE TOC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
PHASE TOC1
EVENTS: Disabled
Range: Disabled, Enabled
Содержание T35
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Страница 14: ...1 4 T35 TRANSFORMER PROTECTION SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
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Страница 472: ...5 270 T35 TRANSFORMER PROTECTION SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 500: ...6 28 T35 TRANSFORMER PROTECTION SYSTEM INSTRUCTION MANUAL PRODUCT INFORMATION CHAPTER 6 ACTUAL VALUES 6 ...
Страница 514: ...7 14 T35 TRANSFORMER PROTECTION SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
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Страница 588: ...C 6 T35 TRANSFORMER PROTECTION SYSTEM INSTRUCTION MANUAL COMMAND LINE INTERFACE APPENDIX C COMMAND LINE INTERFACE C ...
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