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1BPROTECTION FUNCTIONS
PROTECTION, CONTROL AND METERING FUNCTIONS
2.1.10. VOLTAGE UNBALANCE OVERVOLTAGE
2.1.10.1. GENERAL DESCRIPTION( 59 NC)
Overvoltage protection for voltage unbalance in capacitor banks (function 59NC). The
protection element activates when the voltage level measured in the fourth voltage
channel is above the setting value for a time equal to or longer than the setting time
selected by the user. An alarm level is also available for this function.
2.1.10.2. SETTINGS (6 TABLES)
Table 2-14 shows the setting ranges for the overvoltage protection function 59NC
Setting
Minimum
Maximum
Step
Notes
Enable
YES/NO
Pickup for trip (V)
0,8
10
0,01
Definite time (s)
0
600
0,01
Table 2-14 Settings range for the neutral overvoltage protection function 59NC
Figure 2-24 shows the logical diagram for the neutral overvoltage function 59NC
Figure 2-24 Neutral overvoltage function 59NC
2.1.11. VOLTAGE UNBALANCE PROTECTION
2.1.11.1. GENERAL DESCRIPTION (47)
This is a definite time protection unit. The pickup value is, in per unit, the absolute
value of the ratio between the inverse and direct sequence voltages.
V
s
Pickup
blk59NC
blkAnyProt
r59NCTrip
r59NCPkup
Def. Time
0
+
-
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...