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Symmetrical Components Explained
Transient Fault Current Derivation
Aspen Breaker Modeling
Aspen Breaker Model Calculator
Breaker Fault Duty Calculator
IEEE 57.12.90 Xfmr Tests
YY Xfmr in Zero Sequence
YΔ Xfmr in Zero Sequence
YYΔ Xfmr in Zero Sequence
Zero Sequence Xfmr Models
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Aspen Breaker Model Calculator
Nameplate Data
interrupt
cycles
2
3
5
8
kV
max
I
Rated
kA
K factor
S factor
CPT
IEEE 'S' Factor assumes X/R = 17
Interrupt
Cycles
S Factor
2
1.3
3
1.2
5
1.1
8
1.0
Total Current Method
Rated short circuit MVA
Max design kV
Rated momentary amps
Interrupting time (cycles)
kV range factor
Contact parting time (cycles)
Symmetrical Current Method
Rated short circuit amps
Max design kV
Rated momentary amps
Interrupting time (cycles)
kV range factor
Contact parting time (cycles)
Defaults
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