GE D30 User Manual

CHAPTER 5: SETTINGS GROUPED ELEMENTS
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 5-225
5
FlexCurves
FlexCurves are described in the FlexCurves section later in this chapter. The curve shapes for the FlexCurves are derived
from the formulae:
Eq. 5-11
Eq. 5-12
where
T = operate time (in seconds)
TDM = Multiplier setting
I = Input Current
I
pickup
= Pickup Current setting
T
RESET
= Reset Time in seconds (assuming energy capacity is 100% and RESET: Timed)
Definite time curve
The Definite Time curve shape operates as soon as the pickup level is exceeded for a specified period of time. The base
definite time curve delay is in seconds. The curve multiplier of 0.00 to 600.00 makes this delay adjustable from
instantaneous to 600.00 seconds in steps of 10 ms. The definite time curve shapes are defined as follows:
Eq. 5-13
Eq. 5-14
where
T = Operate Time (in seconds)
TDM = Multiplier setting
I = Input Current
I
pickup
= Pickup Current setting
T
RESET
= Reset Time in seconds (assuming energy capacity is 100% and RESET: Timed)
Recloser curves
The D30 uses the FlexCurve feature to facilitate programming of 41 recloser curves. See the FlexCurves settings section
earlier in this chapter for details.
5.7.7.3 Phase time overcurrent (ANSI 51P, IEC PTOC)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  PHASE CURRENT  PHASE TOC1(2)
 PHASE TOC 1


PHASE TOC1
FUNCTION: Disabled
Range: Disabled, Enabled

PHASE TOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2

PHASE TOC1
INPUT: Phasor
Range: Phasor, RMS

PHASE TOC1
PICKUP: 1.000 pu
Range: 0.020 to 30.000 pu in steps of 0.001

PHASE TOC1
CURVE: IEEE Mod Inv
Range: see Overcurrent Curve Types table

GE D30 Specifications

General

Brand	GE
Model	D30
Category	Relays
Language	English