Protection Elements - GE C70 Instruction Manual

SPECIFICATIONS

2.5.1 Protection elements

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 intelligent electronic
devices (IEDs) or 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.
2
VOLTAGE DIFFERENTIAL
Operation:
Auto-setting:
Number of elements:
Matching factor:
Number of trip/alarm stages:
Pickup threshold:
Pickup level accuracy:
Hysteresis:
Pickup delay:
Timer accuracy:
Operate time:
CAPACITOR CONTROL
Functionality:
Closing inhibit delay:
Trip and close seal-in timers:
AUTOMATIC VOLTAGE REGULATOR
Number of elements:
Modes:
Minimum voltage supervision:
Close voltage level:
Open voltage level:
Voltage pickup accuracy:
Close reactive power level:
Open reactive power level:
Power pickup accuracy:
Power factor limit
Power factor accuracy:
Hysteresis:
Close delay:
Open delay:
Timer accuracy:
Operate time:
PHASE/NEUTRAL/GROUND TOC
Current:
Pickup level:
Dropout level:
Level accuracy:
0.1 to 2.0 × CT:
> 2.0 × CT:
Curve shapes:
Curve multiplier:
2-18
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
4 per phase with individual timers per 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, whichever 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 outputs to control tripping and closing
0 to 60 minutes in steps of 1 second
0 to 60.000 s in steps of 0.001
1 per CT/VT module, maximum of 3
voltage with load drop compensation or reactive power with power factor limit
0.500 to 1.500 pu in steps of 0.001
0.750 to 1.500 pu in steps of 0.001
0.750 to 1.500 pu in steps of 0.001
±0.5% of setting from 10 to 208 V
–1.50 to 1.50 pu in steps of 0.01
–1.50 to 1.50 pu in steps of 0.01
±0.05 pu
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, whichever is greater
<80 ms at 60 Hz
Phasor or RMS
0.020 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)
±1.5% of reading > 2.0 × CT rating
IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse,
2
Short/Very/ Extremely Inverse; I t; FlexCurves™ (programmable); Definite Time (0.01 s base
curve)
Time Dial = 0.00 to 600.00 in steps of 0.01
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
CHAPTER 2: PRODUCT DESCRIPTION