Specifications; Protection Elements - GE C70 Instruction Manual

2.2 SPECIFICATIONS

2.2SPECIFICATIONSSPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
The operating times include the activation time of a trip rated form-A output contact unless otherwise indicated.
FlexLogic operands of a given element are 4 ms faster. Take this into account when using FlexLogic to interconnect
with other protection or control elements of the relay, building FlexLogic equations, or interfacing with other IEDs or
NOTE
2
power system devices via communications or different output contacts. If not specified, operate times are given
here for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.
VOLTAGE DIFFERENTIAL
Operation:
Auto-setting:
Number of elements:
Matching factor:
Number of trip/alarm stages: 4 per phase with individual timers per
Pickup threshold:
Pickup level accuracy:
Hysteresis:
Pickup delay:
Timer accuracy:
Operate time:
CAPACITOR CONTROL
Functionality:
Closing inhibit delay:
Trip and close seal-in timers: 0 to 60.000 s in steps of 0.001
AUTOMATIC VOLTAGE REGULATOR
Number of elements:
Modes:
Minimum voltage supervision: 0.500 to 1.500 pu in steps of 0.001
Close voltage level:
Open voltage level:
Voltage pickup accuracy: ±0.5% of setting from 10 to 208 V
Close reactive power level: –1.50 to 1.50 pu in steps of 0.01
Open reactive power level: –1.50 to 1.50 pu in steps of 0.01
Power pickup accuracy: ±0.05 pu
Power factor limit
Power factor accuracy:
Hysteresis:
Close delay:
Open delay:
Timer accuracy:
Operate time:
2-14
per phase
on demand from keypad, per phase
1 per VT bank, maximum of 3
0.5000 to 2000.0000 in steps of 0.0001,
per phase
stage
0.001 to 1.000 pu of bus voltage in steps
of 0.001
0.003 pu
3% or 0.0005 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
contains remote/local and auto/manual
non-volatile latches, collects trip, open
and close input requests and issues out-
puts to control tripping and closing
0 to 60 minutes in steps of 1 second
1 per CT/VT module, maximum of 3
voltage with load drop compensation or
reactive power with power factor limit
0.750 to 1.500 pu in steps of 0.001
0.750 to 1.500 pu in steps of 0.001
0.50 to 1.00 in steps of 0.01
±0.05
0.02 pu (voltage); 0.05 pu (vars)
0 to 65.353 s in steps of 0.001
0 to 65.353 s in steps of 0.001
±3% of operate time or ±20 ms, which-
ever is greater
<80 ms at 60 Hz
C70 Capacitor Bank Protection and Control System
2 PRODUCT DESCRIPTION

2.2.1 PROTECTION ELEMENTS

PHASE/NEUTRAL/GROUND TOC
Current: Phasor or RMS
Pickup level: 0.000 to 30.000 pu in steps of 0.001
Dropout level: 97% to 98% of pickup
Level accuracy:
for 0.1 to 2.0  CT:
±0.5% of reading or ±0.4% of rated
(whichever is greater)
for > 2.0  CT: ±1.5% of reading > 2.0  CT rating
Curve shapes: IEEE Moderately/Very/Extremely
Inverse; IEC (and BS) A/B/C and Short
Inverse; GE IAC Inverse, Short/Very/
Extremely Inverse; I
(programmable); Definite Time (0.01 s
base curve)
Curve multiplier: Time Dial = 0.00 to 600.00 in steps of
0.01
Reset type: Instantaneous/Timed (per IEEE)
Curve timing accuracy
at 1.03 to 20 x pickup: ±3.5% of operate time or ±½ cycle
(whichever is greater) from pickup to
operate
PHASE/NEUTRAL/GROUND IOC
Pickup level: 0.000 to 30.000 pu in steps of 0.001
Dropout level: 97 to 98% of pickup
Level accuracy:
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
Overreach: <2%
Pickup delay: 0.00 to 600.00 s in steps of 0.01
Reset delay: 0.00 to 600.00 s in steps of 0.01
<16 ms at 3  pickup at 60 Hz
Operate time:
(Phase/Ground IOC)
<20 ms at 3  pickup at 60 Hz
(Neutral IOC)
Timer accuracy: ±3% of operate time or ±1/4 cycle
(whichever is greater)
2
t; FlexCurves™
GE Multilin