GE Multilin
C70 Capacitor Bank Protection and Control System
5-167
5 SETTINGS
5.6 GROUPED ELEMENTS
5
The C70 contains protection elements for neutral time overcurrent (ANSI device 51G), neutral instantaneous overcurrent
(ANSI device 50G), and neutral current unbalance (ANSI device 60N). A maximum of six ground time overcurrent and
twelve ground instantaneous overcurrent elements are available, dependent on the CT/VT modules ordered with the relay.
Three neutral current unbalance elements are available.
b) NEUTRAL TIME OVERCURRENT
(ANSI 51N, IEC PTOC)
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
NEUTRAL CURRENT
NEUTRAL TOC1(6)
The neutral time overcurrent element can provide a desired time-delay operating characteristic versus the applied current
or be used as a simple definite time element. The neutral current input value is a quantity calculated as 3Io from the phase
currents and may be programmed as fundamental phasor magnitude or total waveform RMS magnitude as required by the
application.
MESSAGE
NEUTRAL CURRENT
UNBALANCE 1
MESSAGE
NEUTRAL CURRENT
UNBALANCE 2
MESSAGE
NEUTRAL CURRENT
UNBALANCE 3
NEUTRAL TOC1
NEUTRAL TOC1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NEUTRAL TOC1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
MESSAGE
NEUTRAL TOC1
INPUT: Phasor
Range: Phasor, RMS
MESSAGE
NEUTRAL TOC1
PICKUP: 1.000
pu
Range: 0.000 to 30.000 pu in steps of 0.001
MESSAGE
NEUTRAL TOC1
CURVE: IEEE Mod Inv
Range: See OVERCURRENT CURVE TYPES table
MESSAGE
NEUTRAL TOC1
TD MULTIPLIER: 1.00
Range: 0.00 to 600.00 in steps of 0.01
MESSAGE
NEUTRAL TOC1
RESET: Instantaneous
Range: Instantaneous, Timed
MESSAGE
NEUTRAL TOC1 BLOCK:
Off
Range: FlexLogic operand
MESSAGE
NEUTRAL TOC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
NEUTRAL TOC1
EVENTS: Disabled
Range: Disabled, Enabled
Summary of Contents for C70
Page 10: ...x C70 Capacitor Bank Protection and Control System GE Multilin TABLE OF CONTENTS ...
Page 394: ...5 270 C70 Capacitor Bank Protection and Control System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 676: ...E 10 C70 Capacitor Bank Protection and Control System GE Multilin E 1 OVERVIEW APPENDIX E E ...
Page 698: ...H 8 C70 Capacitor Bank Protection and Control System GE Multilin H 3 WARRANTY APPENDIX H H ...