GE b30, Instruction Manual, Page: 431 / 632

CHAPTER 5: SETTINGS GROUPED ELEMENTS
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-223
5
Using the drop-out undervoltage operand as the Block input to the differential element is not recommended. The
differential element includes the saturation detector that responds to certain time relationships between the differential
and restraining currents, and therefore, it must be operational all the time in order to function properly.
This element is used to give a time-delay operating characteristic versus the applied fundamental voltage (phase-to-
ground or phase-to-phase for wye VT connection, or phase-to-phase for delta VT connection) or as a definite time
element. The element resets instantaneously if the applied voltage exceeds the dropout voltage. The delay setting selects
the minimum operating time of the phase undervoltage. The minimum voltage setting selects the operating voltage below
which the element is blocked (a setting of “0” allows a dead source to be considered a fault condition).
Figure 5-116: Phase undervoltage1 logic
5.7.8.3 Phase overvoltage (ANSI 59P, IEC PTOV)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  PHASE OVERVOLTAGE1

PHASE
 OVERVOLTAGE1

PHASE OV1
FUNCTION: Disabled
Range: Disabled, Enabled

PHASE OV1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6

PHASE OV1
PICKUP: 1.000 pu
Range: 0.004 to 3.000 pu in steps of 0.001

PHASE OV1 PICKUP
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01

PHASE OV1 RESET
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01

PHASE OV1 BLOCK:
Off
Range: FlexLogic Operand

PHASE OV1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled

PHASE OV1
EVENTS: Disabled
Range: Disabled, Enabled