GE Multilin
B90 Low Impedance Bus Differential System
5-113
5 SETTINGS
5.5 GROUPED ELEMENTS
5
The instantaneous overcurrent element is used primarily for supervising main protection trip commands on a per-breaker
basis (that is, differential, breaker failure, and end fault protection). It responds to a single-phase current. If the intention is
to allow three-phase tripping if any phase current is above the threshold, the appropriate FlexLogic™ operands are passed
between the IEDs using the B90 fiber optic communications (Direct I/Os).
Instantaneous Overcurrent supervision can also be used to prevent tripping feeders with low currents or for definite time
backup protection.
The pickup setting is specified in per unit values. The nominal current as entered under
SYSTEM SETUP
AC INPUTS
CUR-
RENT BANK XY
CT XY SECONDARY
is 1 p.u. The element can be effectively enabled only when
B90 FUNCTION
is set to "Pro-
tection". One instantaneous overcurrent element is available per each CT input of the relay.
Figure 5–49: INSTANTANEOUS OVERCURRENT LOGIC
d) TIME OVERCURRENT
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
CURRENT ELEMENTS
TIME OVERCURRENT
TIME
OVERCURRENT 1
TOC1 FUNCTION:
Disabled
Range: Disabled, Enabled
MESSAGE
TOC1 CT:
F1
Range: Available current channels
MESSAGE
TOC1 PICKUP:
1.200 pu
Range: 0.000 to 30.000 pu in steps of 0.001
MESSAGE
TOC1 CURVE:
IEEE Mod Inv
Range: see OVERCURRENT CURVE TYPES table
MESSAGE
TOC1 TD MULTIPLIER:
1.00
Range: 0.000 to 600.00 in steps of 1
MESSAGE
TOC1 RESET:
Instantaneous
Range: Instantaneous, Timed
MESSAGE
TOC1 BLOCK:
Off
Range: FlexLogic™ operand
MESSAGE
TOC1 TARGET:
Self-Reset
Range: Self-Reset, Latched, Disabled
MESSAGE
TOC1 EVENTS:
Disabled
Range: Enabled, Disabled
SETTING
IOC 1 FUNCTION:
Disabled = 0
Enabled = 1
SETTING
SETTING
IOC 1 CT:
Current Magnitude, |I|
| I | > PICKUP
RUN
FLEXLOGIC OPERANDS
IOC 1 OP
SETTINGS
IOC 1 PICKUP DELAY:
t
PKP
t
RST
SETTING
B90 FUNCTION:
Logic = 0
Protection = 1
AN
D
SETTING
IOC 1 BLOCK:
Off = 0
IOC 1 PICKUP:
IOC 1 RESET DELAY:
IOC 1 DPO
IOC 1 PKP
Содержание B90 UR Series
Страница 28: ...1 20 B90 Low Impedance Bus Differential System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 114: ...4 28 B90 Low Impedance Bus Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 272: ...6 14 B90 Low Impedance Bus Differential System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 316: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 406: ...B 90 B90 Low Impedance Bus Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 436: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 446: ...D 10 B90 Low Impedance Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...