GE c60 Instruction Manual page 312

GROUPED ELEMENTS
The
PHASE TOC1 PICKUP
accomplished 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
restraint feature is disabled, the pickup level always remains at the setting value.
5
5.7.3.4 Phase instantaneous overcurrent (ANSI 50P, IEC PIOC)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT  PHASE IOC 1(8)
 PHASE IOC 1

5-186
setting can be dynamically reduced by a voltage restraint feature (when enabled). This is
Figure 5-88: Phase time overcurrent voltage restraint characteristic
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.1 0.2 0.3
Phase-Phase Voltage ÷ VT Nominal Phase-phase Voltage
Figure 5-89: Phase time overcurrent 1 logic
PHASE IOC1

FUNCTION: Disabled
PHASE TOC1 PICKUP
0.4 0.5 0.6 0.7 0.8 0.9
818784A4.CDR
Range: Disabled, Enabled
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
setting. If the voltage
1.0