User-Programmable Elements - GE B90 Instruction Manual
Low impedance bus differential
system
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Also See for B90:
- Instruction manual (510 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (440 pages)
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CHAPTER 2: PRODUCT DESCRIPTION
TD multiplier:
Reset type:
Curve timing accuracy at 1.03 to 20 x pickup:
INSTANTANEOUS OVERCURRENT
Pickup level:
Dropout level:
Level accuracy:
0.1 to 2.0 × CT
above 2.0 × CT
Pickup delay:
Reset delay:
Timer accuracy:
Operate time:
UNDERVOLTAGE
Pickup level:
Dropout level:
Level accuracy:
Pickup delay:
Reset delay:
Timer accuracy:
Operate time:
END FAULT PROTECTION
IOC pickup level:
IOC dropout level:
Level accuracy
at 0.1 to 2.0 × CT:
above 2.0 × CT:
CB open pickup timer:
End Fault pickup timer:
Timer accuracy:
BREAKER FAILURE
Mode:
Current supervision:
Current supv. pickup:
Current supv. dropout:
Current supv. accuracy:
0.1 to 2.0 × CT rating:
above 2 × CT rating:
Timer accuracy:
TRIP BUS (TRIP WITHOUT FLEXLOGIC)
Number of elements:
Number of inputs:
Operate time:
Timer accuracy:
2.5.2 User-programmable elements
FLEXLOGIC
Programming language:
Lines of code:
Internal variables:
B90 LOW IMPEDANCE BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
0.00 to 600.00 in steps of 0.01
Instantaneous or Timed (per IEEE)
±3.5% of operate time or ±1/2 cycle (whichever is greater) from pickup to operate
0.020 to 30.000 pu in steps of 0.001
97 to 98% of pickup
0.5% of reading or 1% of nominal (whichever is greater)
1.5% of reading
0 to 65.535 s in steps of 0.001
0 to 65.535 s in steps of 0.001
±3% of operate time or ±1/4 cycle (whichever is greater)
<16 ms at 3x pickup at 60 Hz
0.004 to 3.000 pu in steps of 0.001
102 to 103% of pickup
±0.5% of reading from 10 to 208 V
0 to 65.535 s in steps of 0.001
0 to 65.535 s in steps of 0.001
±3% of operate time or ±1/4 cycle (whichever is greater)
<16 ms at <0.9 x pickup at 60 Hz
0.020 to 30.000 pu in steps of 0.001
97 to 98% of pickup
0.5% of reading or 1% of nominal (whichever is greater)
1.5% of reading
0 to 65.535 s in steps of 0.001
0 to 65.535 s in steps of 0.001
±3% of operate time or ±8 ms, whichever is greater
3-pole
phase current
0.020 to 30.000 pu in steps of 0.001
97 to 98% of pickup
±0.75% of reading or ±2% of rated (whichever is greater)
±2.5% of reading
±3% of operate time or ±1/4 cycle (whichever is greater)
6
16
<2 ms at 60 Hz
±3% or 10 ms, whichever is greater
Reverse Polish Notation with graphical visualization (keypad programmable)
1024
64
SPECIFICATIONS
2
2-17
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