Specifications; Protection Elements - GE L90 Instruction Manual

2.4 SPECIFICATIONS

2.4SPECIFICATIONS
The operating times below include the activation time of a trip rated form-A output contact unless otherwise indi-
cated. FlexLogic operands of a given element are 4 ms faster. Take this into account when using FlexLogic to inter-
connect with other protection or control elements of the relay, building FlexLogic equations, or interfacing with other
NOTE
IEDs or power system devices via communications or different output contacts.
PHASE DISTANCE
2
Characteristic:
Number of zones:
Directionality:
Reach (secondary ):
Reach accuracy:
Distance:
Characteristic angle:
Comparator limit angle: 30 to 90° in steps of 1
Directional supervision:
Characteristic angle:
Limit angle:
Right blinder (Quad only):
Reach:
Characteristic angle:
Left Blinder (Quad only):
Reach:
Characteristic angle:
Time delay:
Timing accuracy:
Current supervision:
Level:
Pickup:
Dropout:
Memory duration:
VT location:
CT location:
Voltage supervision pickup (series compensation applications):
Operation time:
Reset time:
2-16
mho (memory polarized or offset) or
quad (memory polarized or non-direc-
tional), selectable individually per zone
5
forward, reverse, or non-directional
0.02 to 500.00  in steps of 0.01
±5% including the effect of CVT tran-
sients up to an SIR of 30
30 to 90° in steps of 1
30 to 90° in steps of 1
30 to 90° in steps of 1
0.02 to 500  in steps of 0.01
60 to 90° in steps of 1
0.02 to 500  in steps of 0.01
60 to 90° in steps of 1
0.000 to 65.535 s in steps of 0.001
±3% or 4 ms, whichever is greater
line-to-line current
0.050 to 30.000 pu in steps of 0.001
97 to 98%
5 to 25 cycles in steps of 1
all delta-wye and wye-delta transformers
all delta-wye and wye-delta transformers
0 to 5.000 pu in steps of 0.001
1 to 1.5 cycles (typical)
1 power cycle (typical)
L90 Line Current Differential System
2 PRODUCT DESCRIPTION

2.4.1 PROTECTION ELEMENTS

GROUND DISTANCE
Characteristic: Mho (memory polarized or offset) or
Quad (memory polarized or non-direc-
tional)
Reactance polarization: negative-sequence or zero-sequence
current
Non-homogeneity angle: –40 to 40° in steps of 1
Number of zones: 5
Directionality: forward, reverse, or non-directional
Reach (secondary ): 0.02 to 500.00  in steps of 0.01
Reach accuracy: ±5% including the effect of CVT tran-
sients up to an SIR of 30
Distance characteristic angle: 30 to 90° in steps of 1
Distance comparator limit angle: 30 to 90° in steps of 1
Directional supervision:
Characteristic angle: 30 to 90° in steps of 1
Limit angle: 30 to 90° in steps of 1
Zero-sequence compensation
Z0/Z1 magnitude: 0.00 to 10.00 in steps of 0.01
Z0/Z1 angle: –90 to 90° in steps of 1
Zero-sequence mutual compensation
Z0M/Z1 magnitude: 0.00 to 7.00 in steps of 0.01
Z0M/Z1 angle: –90 to 90° in steps of 1
Right blinder (Quad only):
0.02 to 500  in steps of 0.01
Reach:
Characteristic angle: 60 to 90° in steps of 1
Left blinder (Quad only):
0.02 to 500  in steps of 0.01
Reach:
Characteristic angle: 60 to 90° in steps of 1
Time delay: 0.000 to 65.535 s in steps of 0.001
Timing accuracy: ±3% or 4 ms, whichever is greater
Current supervision:
Level: neutral current (3I_0)
Pickup: 0.050 to 30.000 pu in steps of 0.001
Dropout: 97 to 98%
Memory duration: 5 to 25 cycles in steps of 1
Voltage supervision pickup (series compensation applications):
0 to 5.000 pu in steps of 0.001
Operation time: 1 to 1.5 cycles (typical)
Reset time: 1 power cycle (typical)
LINE PICKUP
Phase instantaneous overcurrent: 0.000 to 30.000 pu
Undervoltage pickup: 0.000 to 3.000 pu
Overvoltage delay: 0.000 to 65.535 s
GE Multilin