2-10
B90 Low Impedance Bus Differential System
GE Multilin
2.2 SPECIFICATIONS
2 PRODUCT DESCRIPTION
2
2.2SPECIFICATIONS
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE
2.2.1 PROTECTION ELEMENTS
The operating times below include the activation time of a trip rated form-A output contact unless otherwise indi-
cated. FlexLogic operands of a given element are 4 ms faster. Take this into account when using FlexLogic to inter-
connect with other protection or control elements of the relay, building FlexLogic equations, or interfacing with other
IEDs or power system devices via communications or different output contacts.
BUS DIFFERENTIAL (87B)
Pickup level:
0.050 to 2.000 pu in steps of 0.001
Low slope:
15 to 100% in steps of 1
High slope:
50 to 100% in steps of 1
Low breakpoint:
1.00 to 30.00 pu in steps of 0.01
High breakpoint:
1.00 to 30.00 pu in steps of 0.01
High set level:
0.10 to 99.99 pu in steps of 0.01
Dropout level:
97 to 98% of pickup
Level accuracy:
0.1 to 2.0
CT rating: ±0.5% of reading or ±1% of rated (whichever is greater)
>2.0
CT rating
±1.5% of reading
Operating time:
one power system cycle (typical)
Number of zones:
1 or 4 (option)
Max number of inputs:
8, 16, or 24 (option)
CT TROUBLE
Responding to:
Differential current
Pickup level:
0.020 to 2.000 pu in steps of 0.001
Pickup delay:
1.0 to 60.0 sec. in steps of 0.1
Time accuracy:
±3% or ±40 ms, whichever is greater
Availability:
one per zone of protection
ISOLATOR MONITORING
Responding to:
Both normally-open and normally-closed auxiliary contacts
Asserting:
Isolator Position, Isolator Alarm, Block Switching
Alarm pickup delay:
0.00 to 10.00 s in steps of 0.05
Time accuracy:
±3% or ±40 ms, whichever is greater
TIME OVERCURRENT
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 1% of nominal (whichever is greater)
above 2.0
CT
1.5% of reading
Curve shapes:
IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse, Short/Very/
Extremely Inverse; I
2
t; FlexCurves™ (programmable); Definite Time (0.01 s base curve)
TD multiplier:
0.00 to 600.00 in steps of 0.01
Reset type:
Instantaneous or Timed (per IEEE)
Time accuracy:
±3% or ±40 ms, whichever is greater
INSTANTANEOUS OVERCURRENT
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 1% of nominal (whichever is greater)
above 2.0
CT
1.5% of reading
Pickup delay:
0 to 65.535 s in steps of 0.001
Reset delay:
0 to 65.535 s in steps of 0.001
NOTE
Summary of Contents for B90 UR Series
Page 316: ...A 4 B90 Low Impedance Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 406: ...B 90 B90 Low Impedance Bus Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Page 436: ...C 30 B90 Low Impedance Bus Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 446: ...D 10 B90 Low Impedance Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
