GE C70 Instruction Manual page 48

2.4 SPECIFICATIONS
NEGATIVE SEQUENCE TOC
Pickup level:
Dropout level:
Level accuracy:
2
Curve shapes:
Curve multiplier (Time dial): 0.00 to 600.00 in steps of 0.01
Reset type:
Curve timing accuracy
at 1.03 to 20 x pickup:
NEGATIVE SEQUENCE IOC
Pickup level:
Dropout level:
Level accuracy:
Overreach:
Pickup delay:
Reset delay:
Operate time:
Timer accuracy:
PHASE DIRECTIONAL OVERCURRENT
Relay connection:
Quadrature voltage:
Polarizing voltage threshold: 0.000 to 3.000 pu in steps of 0.001
Current sensitivity threshold: 0.05 pu
Characteristic angle:
Angle accuracy:
Operation time (FlexLogic operands):
2-18
0.000 to 30.000 pu in steps of 0.001
97% to 98% of pickup
±0.5% of reading or ±0.4% of rated
(whichever is greater)
from 0.1 to 2.0 x CT rating
±1.5% of reading > 2.0 x CT rating
IEEE Moderately/Very/Extremely
Inverse; IEC (and BS) A/B/C and Short
Inverse; GE IAC Inverse, Short/Very/
2
Extremely Inverse; I t; FlexCurves™
(programmable); Definite Time (0.01 s
base curve)
Instantaneous/Timed (per IEEE) and Lin-
ear
±3.5% of operate time or ±½ cycle
(whichever is greater) from pickup to
operate
0.000 to 30.000 pu in steps of 0.001
97 to 98% of pickup
0.1 to 2.0 × CT rating: ±0.5% of reading
or ±0.4% of rated (whichever is greater);
> 2.0 × CT rating: ±1.5% of reading
<2%
0.00 to 600.00 s in steps of 0.01
0.00 to 600.00 s in steps of 0.01
<20 ms at 3 × pickup at 60 Hz
±3% of operate time or ±1/4 cycle
(whichever is greater)
°
90 (quadrature)
ABC phase seq.: phase A (V ), phase
BC
B (V ), phase C (V ); ACB phase
CA AB
seq.: phase A (V ), phase B (V
CB AC
phase C (V )
BA
°
0 to 359 in steps of 1
±2°
Tripping (reverse load, forward fault):<
12 ms, typically
Blocking (forward load, reverse fault):<
8 ms, typically
C70 Capacitor Bank Protection and Control System
NEUTRAL DIRECTIONAL OVERCURRENT
Directionality:
Polarizing:
Polarizing voltage:
Polarizing current:
Operating current:
Level sensing:
Restraint, K:
Characteristic angle:
Limit angle:
Angle accuracy:
Offset impedance:
Pickup level:
Dropout level:
Operation time:
NEGATIVE SEQUENCE DIRECTIONAL OC
Directionality:
Polarizing:
Polarizing voltage:
Operating current:
Level sensing:
Restraint, K:
Characteristic angle:
Limit angle:
Angle accuracy:
Offset impedance:
Pickup level:
Dropout level:
Operation time:
PHASE CURRENT UNBALANCE
),
Operation:
Auto-setting:
Number of elements:
Inherent unbalance factor:–0.1000 to 0.1000 in steps of 0.0001,
Number of trip/alarm stages: 4 per phase with individual timers per
Pickup threshold:
Pickup level accuracy:
Hysteresis:
Pickup delay:
Timer accuracy:
Operate time:
2 PRODUCT DESCRIPTION
Co-existing forward and reverse
Voltage, Current, Dual, Dual-V, Dual-I
V_0 or VX
IG
I_0
3 × (|I_0| – K × |I_1|), IG
Independent for forward and reverse
0.000 to 0.500 in steps of 0.001
–90 to 90° in steps of 1
40 to 90° in steps of 1, independent for
forward and reverse
±2°
0.00 to 250.00 Ω in steps of 0.01
0.002 to 30.000 pu in steps of 0.01
97 to 98%
<16 ms at 3 × pickup at 60 Hz
Co-existing forward and reverse
Voltage
V_2
I_2
Zero-sequence:|I_0| – K × |I_1|
Negative-sequence:|I_2| – K × |I_1|
0.000 to 0.500 in steps of 0.001
0 to 90° in steps of 1
40 to 90° in steps of 1, independent for
forward and reverse
±2°
0.00 to 250.00 Ω in steps of 0.01
0.015 to 30.000 pu in steps of 0.01
97 to 98%
<16 ms at 3 × pickup at 60 Hz
per phase
on demand from keypad, per phase
1 per CT bank, maximum of 3
per phase
stage
0.001 to 5.000 pu of split-phase CT nom-
inal in steps of 0.001
0.002 pu for <1 pu current and <20 CT
mismatch between phase and differen-
tial CT
3% or 0.001 pu, whichever is greater
0 to 600.00 s in steps of 0.01
±3% of operate time or ±35 ms, which-
ever is greater
<35 ms at 60 Hz
GE Multilin