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8BPROTECTION FUNCTIONS OVERVIEW
INTRODUCTION
1.8. PROTECTION FUNCTIONS OVERVIEW
ANSI/IEEE
Code
Function
Ranges
Increment
Accuracy
Open Phase
Pickup
0.1 a 0.5% (p.u. to I
2
/I
1
)
0.01 (p.u. of
I
2
/I
1
)
±
10 mA or
±
0.5%
Fastest trip: 80ms
Definite Time
0.0 a 300 s
0.01 s
±
half cycle
ANSI/IEEE
Code
Function
Ranges
Increment
Accuracy
Sequence Overcurrent
Negative Sequence Inverse Time Overcurrent
Pickup I2
0.02 a 20 A (In = 1 A)
0.001 A
10mA o ± 0.5%
0.1 a 100 A (In = 5 A)
0.001 A
15mA o ± 0.5%
Definite Time
0 a 60 s
0.01
± half cycle
Fastest trip: 70ms
Negative Sequence Definite Time Overcurrent
Pickup I2
0.02 a 20 A (In = 1 A)
0.001 A
10mA o ± 0.5%
0.1 a 100 A (In = 5 A)
0.001 A
15mA o ± 0.5%
ANSI/IEEE
Code
Function
Ranges
Increment
Accuracy
Low/High Instantaneous Overcurrent
Phase/Ground
Pickup
0.02 a 20 A (In = 1 A)
0.1 a 100 A (In = 5 A)
0.001 A
10mA o ± 0.5%
15mA o ± 0.5%
Neutral Pickup
0.005 a 10 A (In = 1 A)
0.025 a 50 A (In = 5 A)
0.001 A
10mA o ± 0.5 %
Definite Time
0 a 60 s
0.01 s
±
0.5 cycle or
+/- 0.25%
Fastest tirp:30ms
50
46
DT
46
IT
46
OP
Summary of Contents for smART P500
Page 1: ...Instruction Manual Multifunction Protection Relay smART P500...
Page 23: ...2BTABLES INDEX THIS PAGE HAS BEEN LEFT BLANK INTENTIONALLY...
Page 39: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 9 Wye Wye Connection measured neutral...
Page 40: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 10 Wye Wye Connection sensitive neutral...
Page 41: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 11 Open Delta Connection measured neutral...
Page 42: ...5BHARDWARE FEATURES INTRODUCTION Figure 1 12 Open Delta Connection sensitive neutral...
Page 511: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 6 Moderately ANSI curve...
Page 513: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 7 Very inverse ANSI curve...
Page 515: ...2BANSI CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 8 Extremely inverse ANSI curve...
Page 532: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 14 Recloser Curves 101 119...
Page 535: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 15 Recloser Curves 120 142...
Page 538: ...4BRECLOSER CURVES 0BCURVES FOR TIME CHARACTERISTICS Figure I 16 Recloser Curves 151 202...