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1BPROTECTION FUNCTIONS
PROTECTION, CONTROL AND METERING FUNCTIONS
Figure 2-4 Neutral time overcurrent elements
2.1.2.2.1. SETTING RANGES (6 GROUPS)
The settings for these functions are shown in Table 2-4
Setting
Minimum
Maximum
Step
Notes
Enable
YES/NO
Pickup (A)
0,02
20
0,001
For In=1 A
0,10
100
0,001
For In=5 A
Time Multiplier(Dial)
0,05
1,09
0,01
For IEC curves
0,5
30
0,01
For ANSI curves
0,5
15
0,01
For US curves
Time Adder
0
100
0,01
Minimun Response Time Adder
0.013
1
0.001
Definite time (s)
0
600
0,01
Table 2-4 Settings range for the neutral overcurrent elements
The trip current is set in secondary Amperes. The notes about operation time are
the same as those given for phases.
2.1.2.3. INSTANTANEOUS CHARACTERISTICS (50N)
Two instantaneous elements are available (low-level and high-level), with an
additional time option.
Figure 2-5 shows the logical diagram for the low-level neutral instantaneous
overcurrent element.
blkAnyOC
blkAnyProt
blk51
+
-
IFN
MED
IFN Pickup
blk51N
r51NPkup
(pickup)
r51NTrip
(trip)
Time element
Time Element
•
Pickup
•
Curve
•
Curve family
•
Characteristic
•
Electromechanical Reset (S/N)
•
Definite time
•
Curve Modifiers
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...