Specifications; Protection Elements - GE C70 Instruction Manual

2 PRODUCT DESCRIPTION
2.4SPECIFICATIONSSPECIFICATIONS 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
power system devices via communications or different output contacts. If not specified, the operate times given
here are for a 60 Hz system at nominal system frequency. Operate times for a 50 Hz system are 1.2 times longer.
VOLTAGE DIFFERENTIAL
Operation: per phase
Auto-setting: on demand from keypad, per phase
Number of elements: 1 per VT bank, maximum of 3
Matching factor: 0.5000 to 2000.0000 in steps of 0.0001,
per phase
Number of trip/alarm stages: 4 per phase with individual timers per
stage
Pickup threshold: 0.001 to 1.000 pu of bus voltage in steps
of 0.001
Pickup level accuracy: 0.003 pu
Hysteresis: 3% or 0.0005 pu whichever is greater
Pickup delay: 0 to 600.00 s in steps of 0.01
Timer accuracy: ±3% of operate time or ±35 ms, which-
ever is greater
Operate time: <35 ms at 60 Hz
CAPACITOR CONTROL
Functionality: 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
Closing inhibit delay: 0 to 60 minutes in steps of 1 second
Trip and close seal-in timers: 0 to 60.000 s in steps of 0.001
AUTOMATIC VOLTAGE REGULATOR
Number of elements: 1 per CT/VT module, maximum of 3
Modes: voltage with load drop compensation or
reactive power with power factor limit
Minimum voltage supervision: 0.500 to 1.500 pu in steps of 0.001
Close voltage level: 0.750 to 1.500 pu in steps of 0.001
Open voltage level: 0.750 to 1.500 pu in steps of 0.001
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 0.50 to 1.00 in steps of 0.01
Power factor accuracy: ±0.05
Hysteresis: 0.02 pu (voltage); 0.05 pu (vars)
Close delay: 0 to 65.353 s in steps of 0.001
Open delay: 0 to 65.353 s in steps of 0.001
Timer accuracy: ±3% of operate time or ±20 ms, which-
ever is greater
Operate time: <80 ms at 60 Hz
GE Multilin C70 Capacitor Bank Protection and Control System

2.4.1 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:
0.1 to 2.0 × CT:
±0.5% of reading or ±0.4% of rated
(whichever is greater)
> 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
Voltage restraint: modifies pickup current for voltage in the
range of 0.1<V<0.9 VT Nominal in a
fixed linear relationship
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)

2.4 SPECIFICATIONS

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t; FlexCurves™
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