CHAPTER 5: SETTINGS GROUPED ELEMENTS
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-305
5
There are three phase overvoltage elements available. A phase overvoltage element is used as an instantaneous element
with no intentional time delay or as a definite time element. The input voltage is the phase-to-phase voltage, either
measured directly from delta-connected VTs or as calculated from phase-to-ground (wye) connected VTs. The figure
shows specific voltages to be used for each phase.
Figure 5-169: Phase overvoltage logic
5.7.14.4 Neutral overvoltage (ANSI 59N, IEC PTOV)
SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) VOLTAGE ELEMENTS NEUTRAL OV1(3)
If the source VT is wye-connected, then the phase overvoltage pickup condition is V > x Pickup for V
AB
, V
BC
, and
V
CA
.
NEUTRAL OV1
NEUTRAL OV1
FUNCTION: Disabled
Range: Disabled, Enabled
NEUTRAL OV1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
NEUTRAL OV1 PICKUP:
0.300 pu
Range: 0.004 to 3.000 pu in steps of 0.001
NEUTRAL OV1 CURVE:
Definite Time
Range: Definite Time, FlexCurve A, FlexCurve B,
FlexCurve C
NEUTRAL OV1 PICKUP:
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
NEUTRAL OV1 RESET:
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
NEUTRAL OV1 BLOCK:
Off
Range: FlexLogic operand
NEUTRAL OV1 TARGET:
Self-reset
Range: Self-reset, Latched, Disabled
NEUTRAL OV1 EVENTS:
Disabled
Range: Disabled, Enabled
To Next Page
Loading...
Need help?
General
